Engineering Pre-Design Study

Transcription

1 Engineering Pre-Design Study report for: University of Minnesota Project Name: University Project Number: KFI Project Number: March 2, 2017

2 Title Page Building Information University of Minnesota OIT Building 2218 University Avenue KFI Project Manager Information Mark E. Svenkeson, P.E. Karges-Faulconbridge, Inc. 670 County Road B West St. Paul, MN mesvenkeson@kfi-eng.com Office Fax Site Contacts George Mahowald University of Minnesota - Project Manager Capital Planning and Project Management 300 Donhowe Building th Avenue SE Minneapolis, MN mahow007@umn.edu 2 Page

3 Table of Contents Title Page...2 Table of Contents...3 Executive Summary...4 Existing Installation...5 General Facility Conditions... 5 Mechanical Systems... 5 Electrical Systems... 6 Fire Protection System... 8 Design standards...9 General Mission Critical facility Considerations... 9 Transition Considerations Required modifications to meet Tier I standard Recommended modifications to meet Tier I standard Mechanical Systems Mechanical Cooling Equipment Options Mechanical System Recommendations Electrical Systems Electrical System Recommendations Fire Protection System Recommendations Budgetary Considerations Appendix 1 Uptime Institute Standards Page

4 Executive Summary Karges-Faulconbridge, Inc. has been retained to provide a Pre-Design study for the University of Minnesota at the 2218 University Avenue address. The basis of the study effort is to assist the University in their transition from 48 volt DC powered equipment to processor based equipment which operates at universal AC power. The target standard has been identified as the Uptime Institutes Tier Standards. This report reviews the options available to modify the existing mechanical and electrical systems to meet the Tier 1 requirements in addition to considering the existing facility standards for building systems and mission critical application in particular. This report presents the result of that study effort as well as order of magnitude costs associated with a selected few approaches. The facility as found is a mixed-use facility of approximately 33,000 square feet, which is primarily single story construction with a small second story area. The facility supports approximately 3,300 sf of mission critical space, which has operated mainly as a telecommunications hub for the University. The telco equipment is transitioning from the existing support platform, which utilizes 48 volts direct current, to a modern platform, which utilizes 120 VAC power, and the facility must accommodate the change in requirements. The study effort presented herein discusses the change in power system requirements and the transition effort required. The standard as developed by the Uptime Institute for Tier 1 applications is utilized as a design bench mark and modifications required to meet that requirement are the subject discussed. Additional requirements, as they are identified by the University of Minnesota standards for facilities, are also considered in developing the recommended plan presented herein. Finally the report presents order of magnitude budgetary costs associated with the conceptual plans as they are presented. 4 Page

5 Existing Installation General Facility Conditions The existing facility is comprised of approximately 34,000 square feet of single story construction with a limited second story of approximately 1,050 square feet. A limited area of approximately 3,300 square feet is segregated into a dedicated space for support of the mission critical operations. This report focuses on the mission critical space and related systems only. The area under consideration is supported from the building electrical utility connection. Dedicated mechanical and electrical equipment is provided to support the existing processing equipment, which is arranged on open racks as is typical of a telecommunications installation. The space is arranged in rack rows with mechanical equipment on one end feeding an overhead ducted delivery system, with the general room space providing a return air pathway. The floor is concrete and the ceiling is open to the ceiling trusses. One corner of the room is partitioned off and serves as the entry point for the telecommunication pathways, this space is supported from the mission critical support systems and lies fully within the dedicated space provided. The space as it exists today does not operate under the NEC code for mission critical equipment, article 645 of the National Electrical Code allows special privileges and incurs responsibilities when invoked. This facility does not presently require the privileges allowed and therefore the code requirements for this section are not applicable. Mechanical Systems The mechanical support system is comprised of a pair of computer room air conditioners configured to provide up-flow air in support of the over-head, ducted delivery system. The two units are a DX based technology and were originally installed in The units installed within the room are each coupled with a dedicated condenser, which is mounted on the roof and rejects the heat into the environment. The mission critical space is fully supported by the installed units and do not appear to interact with the systems provided for the remaining building space. The installation utilizes a 5 Page

6 single overhead ducted delivery system with appropriate dampers to operate individually or as a pair. The average service life expectation is 15 years. The installed equipment has been well maintained and had upgrades incorporated, however it is still perceived to be at or nearing the end of its reliable service life and should be considered for replacement. The computer room air conditioners control the room temperature and humidity, the critical processing equipment provides a continuous requirement for air-conditioning. Humidity control is required to prevent condensation and static electricity. Electrical Systems The electrical system is derived from a connection to Xcel Energy s local distribution system via a pad mounted transformer. The transformer provides 480Y/277 VAC power to the facility service entrance equipment. The switchgear is located in a dedicated space within the facility and is comprised of a 800 amp, main circuit breaker and an attached section for distribution circuit breakers as shown is figure 1. Historical load data was provided and it records the maximum facility electrical demand as occurring in July, 2012 at a figure of 292 KW. The month of July appears to provide the largest electrical demand and it is shown decreasing steadily since 2012 to a recorded value of 225 KW for The utility records provide no indication how much of the power utilized is for the mission critical operation. The processing equipment electrical loading value was utilized as a basis to estimate the cooling load electrical demand. A factor of two times the processing load is considered a reasonable benchmark calculation for the overall process load estimation. The switchboard feeds the facility general requirements, the major mechanical system components and a dedicated circuit equipped with access to a roll up generator connection. A manual transfer switch is incorporated into the circuit to facilitate the generator connection. 6 Page

7 Figure 1 Partial Existing Electrical One Line Diagram 7 Page

8 A DC rectifier is installed with a sizable battery support bank to power the existing operations DC power requirements. A DC distribution network distributes power to the racks within the operational space. AC power is distributed from a transformer that distributes overhead, in many cases to support rack mounted UPS equipment. Approximately 1/3 of the present load is reported to operate on the installed DC system with the remainder served by point of use UPS systems installed in the rack assemblies. The reported load on the DC system was 440 amps at 54 VDC, which equates to approximately 24 KW. Extrapolating from the other information provided would place the processing load at something less than 75 KW, which is consistent with the report that the facility is presently capable of operating on one of the two installed a/c units and maintaining operational temperatures. Fire Protection System The existing facility Processing Room area is supported by double interlock pre-action system. This installation meets the requirements of the Uptime Institute tier 1 standard. Adjacent areas are protected as expected for what is presently office/lab type applications and will need to be modified for the new use described here in this report. The existing double interlock pre-action system is expected to remain in service. The existing detection/releasing system for the pre-action system should be evaluated to ensure the best sequence of operation is in place and that it meets the owner s expectations. 8 Page

9 Design standards The objective of this effort is to modify the existing mission critical operation to operate on an AC power source and to meet the requirements of the Uptime Institutes Tier 1 requirements. Additional considerations are required to address the University of Minnesota s facility electrical standards for building installations. A copy of the Uptime Institutes standards is provided as an appendix to this report. The University of Minnesota Electrical Standard is believed to be available to this audience and is not reproduced here. A Tier 1 installation as defined by the Uptime Institute includes non-redundant components of capacity to support the critical environment, a UPS system to filter the incoming power and a generator to provide power in case of a utility failure. There is no generator at the existing installation. The University building electrical standard requires that All building service main switchboards shall be a main-tie-main configuration. This facility is equipped with a single ended, 800 amp capacity, and main switchboard. General Mission Critical facility Considerations A mission critical facility generally exists to support processing equipment, which is critical to the mission of the owner who operates the facility. The function of the mission critical facility is to provide a reliable operating environment for the critical process, with the level of reliability determined by the owner of the process as a function of the value the process represents. Electrical support systems have been under development for many years and the available options generally have been well defined as the support technology has matured. The mechanical support systems have been in a state of change in recent years as efforts to achieve higher efficiency have resulted in a number of technology changes that are available for consideration in this environment. 9 Page

10 The power consumed within a mission critical space has is generally orders of magnitude larger than that required for a similar office environment. The designer of the mission critical space must first incorporate provisions into the electrical system to insure the presence of continuous power, even in the event of a utility failure. This search for reliability results in an engine generator installation on site. The critical electrical system (processing power) is momentarily supported via a battery system through a UPS or similar unit while the generator starts and connects. This requires the mechanical support systems to be capable of successfully handling the short duration outage associated with generator connection schemes, and restarting automatically once the generator is connected. The electrical processing loads are supported through the transition from utility to generator and back by some type of UPS utility system incorporating energy storage sufficient to span the required time frame. Mechanical flywheels and other means have been explored to provide this energy storage, however batteries remain the selection of choice for the majority of installations. As the power density within the protected space rises, there is a point where the cooling systems must be considered for operation through a transition from utility to generator and back. The point where this occurs is best defined in accordance with the processing equipment specifications. Most processing equipment can operate successfully in a wide range of temperatures; the industry relies on ASHRAE standards to provide universal definitions for common usage. The latest Ashrae standards indicate the strictest requirements (A1 classification) allow temperatures to range from 59 to 89 degrees farenheight, other less stringent categories allow greater temperature ranges. The difficult parameter to meet in this situation is the allowable rate of change to that temperature. This rate of change value varies between manufacturer but the most common figure found is a limit to the changing temperature to a rate of 36 degrees per hour. This figure will be very difficult to sustain during a generator transition when the HVAC system generally is out of service until the return of power to the facility. Note that a 10 degree change in 5 minutes represents a rate of 120 degrees per hour. The functional limitations of the installation are dependent on the processing equipment installed; however, it is widely held that the need for uninterruptable air conditioning is at the point where the compute power density reaches approximately 70 watts 10 Page

11 per square foot. The estimated power density at this facility is not expected to exceed 50 watts per square foot across the IT platform space in this facility. As the power density rises different approaches to system design are required to provide some form of continuous cooling through a momentary utility outage and the resulting generator transition. Modern cooling systems comprised of complex equipment which is microprocessor controlled. The units usually incorporate some type of fan to move the air, a compressor to provide the cooling and a microprocessor to control the system. In the generator connection sequence it is important to understand the time to start the compressor equipment and initialize cooling. This consideration must include the processor reboot time and generally will approach 1 minute before actual cooling can begin to operate. The approaches to continuous cooling can start by breaking out the power supply to the processor within the A/C equipment and providing it with continuous power, avoiding the reboot time element. Additional measures can range from breaking out the fan power for support by independent UPS supported circuit to supporting the entire mechanical system in extreme cases of high power density. The University of Minnesota 2218 building is not expected to present power densities above 50 watts per square foot and thus it is expected to operate without the need to provide any form of continuous cooling beyond the incorporation of a back-up generator for the site. Transition Considerations The transition from the existing installation to any of the options discussed herein will require careful coordination between multiple entities to be successful. Modification of the facility must provide a capability for the critical processing operation to continue throughout the process with the possible exception of minor/partial outages to portions of the operation where no alternatives are available. New support systems must be capable of being installed while the existing systems continue to support the critical process. Once new support systems are installed then a cutover from the existing to the new must occur which is where most severe difficulties generally are present and shut downs may be required. In addition, the 2218 building is served with a single utility connection and houses other functions besides the critical 11 Page

12 process installation. The other functions must also be considered when the building infrastructure is modified as they too may be subject to impact resulting form that effort. Required modifications to meet Tier I standard The existing facility support systems provide a reasonable representation of a tier I installation with the noted exception being there is no backup generator located at this facility. The processing operation is segregated into a dedicated space and has dedicated cooling with redundancy which exceeds the tier 1 standard requirement. The power filtering requirement is provided through a combination of small rack mounted UPS equipment and a large scale telcom style inverter battery system. The operations connection to the facility electrical service is routed through a manual transfer device that provides a connection point for a portable generator. In general the facility could be said to meet the tier 1 standard by replacing the existing manual connection with an automatically operated transfer device connected to a permanently installed generator. The facility operation is changing though and the electrical system must be modified to support the change in processing equipment. The utilization of DC voltage to support the telcom operation is giving way to more traditional processing equipment which operates on AC power. The existing DC power plant will be largely oversized to support the small remaining DC voltage powered equipment. The remaining equipment will be installed within processing racks forming a POD within the existing space. The remaining space will support the equipment which will continue to require traditional telco industry open racking systems. The mechanical and electrical systems need to be modified to support the new operation and the modification must be designed to allow an organized transition from the existing operation to the new. The existing facility has space adjacent to the existing processing space, which can be support. The existing mechanical system is at or nearing end of life and a plan has been developed which replaces the existing equipment with new and corrects existing air flow deficiencies at the same time. Options for cooling the space are presented in this report which includes in row cooling applications as well as the latest technology high efficiency applications. 12 Page

13 The new processing equipment installation will require UPS power to replace the function presently provided by the DC power system. The multiple existing small scale UPS system loads will be supported by the new central UPS system. The filtering function is similar as the small units installed but is more robust and therefore easier to monitor and maintain. Recommended modifications to meet Tier I standard Mechanical Systems The existing mechanical system supporting the critical process are direct expansion (DX) type air conditioners. Two independent modules provide up-flow air to an overhead ducted air distribution system which in turn delivers the cold air to the locations where needed. The existing room layout is shown in figure XX and it shows that the rack layout and air-conditioner arrangement do not work together well in the effort to provide clean efficient air flow patterns. The air is distributed to the Cold aisles through the overhead duct system and then must flow through the room to return to the A/C units. The return path is perpendicular to the rack rows and is forced to flow through or over the equipment to complete this journey. The result is less than optimal in efficiency. The present facility utilized telco type racking which is generally open and does allow some air to flow directly through the racks. As the facility migrates to more conventional data center racking the flow patterns will become constrained to flow around the racks and environmental control will deteriorate further. Discussions regarding relocating the processor racks show that it isn t feasible, therefore the remaining option is to relocate the cooling equipment. The existing equipment is at or near end of life and is recommended for replacement. Placing the new equipment within the space and locating it at the row ends to facilitate air-flow patterns is the recommended approach as it also is supportive of the necessary transition planning. 13 Page

14 Mechanical Cooling Equipment Options Physical arrangement of the processing equipment plays a role in the cooling of the space. As power densities are raised the first impact on the processing equipment (assuming the a/c units are already properly located in the space) is to modify the layout to create hot and cold aisles, thus preventing the hot air from one rack entering directly into the cooling intake or the equipment behind it. Various arrangements have been developed within the industry which further encapsulates either the Hot Aisle or the Cold Aisle to the point where the enclosed aisle containment is complete. Two obvious approaches have developed base on containment of the hot aisle of the cold aisle. Hot aisle containment is desirable because it results in a high temperature within the enclosed space allowing the A/C units to be loaded to a high percentage and operate efficiently. Some concerns exist in regards to the environment as workers must access the space with the warm temperatures and OSHA work rules must be considered. Other concerns with enclosing either aisle completely is the fire protection of the enclosed space. One example of a vender supported Hot Aisle arrangement is provided as figure 2. Cold Aisle containment is another option where the space in front of the rows is enclosed with doors at the end of the aisles to contain the cold air. A source of cold air is supplied to the enclosed row at the required rate to cool the equipment. Hot air is expelled from the rear of the processing equipment and is free to return to the A/C units. Modifications of this approach can provide ducted return as well. In general A/C systems in Minnesota will provide the best efficiency when designed to utilize the climate for the greatest amount of time possible. Systems which can operate with compressors during hot times and without when the temperatures permit provide the lowest operating costs, referred to as a free cooling mode, and are therefore preferred. Liquid based cooling systems are the first choice in utilizing the free cooling concept, as they generally provide this functionality at the least cost. However, there is great concern whenever water is introduced into a processing center, so this approach has been dismissed in this instance. 14 Page

15 Figure 2 Vender Recommended Hot Aisle Containment layout 15 Page

16 Pumped refrigerant or variable refrigerant flow (VRF) systems are ideal for use around electronic equipment or data centers. Using a control system, refrigerant is pumped through pipes to individually sized/configured evaporators in each space, each of which can have its own thermostat. It's a closed-loop system so refrigerant is continuously circulated, unlike a chilled water system, which requires new chilled water to be pumped into the pipes to make up water lost through cooling towers. The pumped refrigerant operates at low pressure becomes a gas a room conditions preventing any water damage that may occur with a chilled water system. The amount of refrigerant should be calculated and verified with ASHRAE Standard 15, Safety Standard for Refrigeration Systems. ASHRAE 15, in conjunction with the tables in ASHRAE Standard 34, Designation and Safety Classification of Refrigerants, establishes acceptable concentration limits based on room volume for different refrigerant types. The current version of ASHRAE 15 gives a value of 25 lb refrigerant/1,000 cu ft for R-410A. There are many manufacturers that produce equipment for data centers utilizing this technology. The cooling modules can be placed in a rack, pod, or in the general space to provide cooling where it is most needed to protect the data center equipment. Low ambient kits are vital to the success of the variable refrigerant systems. The outdoor condensing units must be capable of operating at the lowest ambient temperature in Minneapolis. Typically, this equipment can operate at 30 degrees F. VRF systems also require less maintenance and downtime than a water cooled system. Individual refrigerant circuits allow for redundancy within each system. The existing Liebert units or new units can provide the general cooling and dehumidification for the space while new units can provide the dedicated cooling required for the pod. Ventilation air should be provide to the space through the main HVAC system. The amount of ventilation air required is minimal and will not affect the temperature or humidity levels of the space. 16 Page

17 Mechanical System Recommendations The facility mechanical load is expected to be well served by two air conditioners of 20 tons nominal capacity. The existing units are not well placed and are at end of life and should be replaced. KFI recommends that new up-flow a/c units be provided and connected into the existing ceiling plenum. The existing units could remain as needed until the new units are functional. The new units would be placed along the outside wall at the rack row ends to facility proper airflow. A third up-flow type a/c unit could be added to provide redundancy; the independent operation of the a/c units provides excellent reliability. The lowest first cost installation would utilize DX type systems which are updated versions of the existing equipment. Another option to provide redundancy is to insert smaller capacity a/c units intermixed with the processing equipment, identified as in-row application. The planned POD arrangement can be served by in-row a/c units and redundancy provided by the overhead system. The in-row a/c units are available in DX type of operation also. An upgrade system which utilizes pumped refrigerant and is capable of providing free cooling is recommended for consideration. This option is available in the up flow a/c units as well as the in row application and costs have been provided for both. Detailed modeling of cost saving opportunities is outside the scope of this effort. A sketch of this arrangement is provided as figure Page

18 Figure 3 Modified Processing Room Layout 18 Page

19 Electrical Systems The existing processing operation is supported through a single circuit which connects it to the facility electrical service which can be connected to a portable generator if available when needed. The facility electrical load is estimated to represent approximately two thirds of the facility electrical consumption though it occupies only approximately 10% of the facility space. The tier 1 standard requires a generator and two spaces have been identified as candidate locations. Discussion with U of M staff have narrowed the generator location to a single space, which is adjacent to the processing operation and appears to be suitable for installation of a generator. The existing DC power plant should be removed and replaced with small scale systems as the new processing equipment is installed. A new UPS system of sufficient capacity to support the new processing equipment and the existing load supported by small scale UPS equipment. The existing method of distributing power to the load via isolation transformer, distribution panelboards and overhead wiring suits the facility while presenting a reliable, low cost approach, which can be easily replicated as needed to increase the available capacity up to and beyond that of the new UPS system. The power required for the processing operation is expected to approach 300 KW and as such will dominate the facility electrical service. The University of Minnesota standards for facilities requires a main-tie-main operation and KFI is in agreement that such equipment is appropriate for this type of process. As the facility load grows the existing switchgear is unable to grow in support due to access requirements which are effective for installations larger than the existing. The facility would do well to install new electrical equipment at this time of sufficient capacity to meet or exceed any future expectations. The new service equipment could be tailored to meet the processing operation support and the existing electrical service could be demoted to a sub fed board which supports the remaining facility operations, assuming the a/c units are already properly located within the space. 19 Page

20 Electrical System Recommendations The existing facility minimal modifications would utilize the existing service entrance switchgear and retain the single ended electrical connections as they exist today. It would be necessary to develop a second connection to the existing switchboard in order to develop connection interfaces for back-up generator interface with the system. The system would utilize the existing electrical support path and replace the manual transfer device with an automatic switch connected to a permanent generator installation. A sketch of the resulting electrical one line diagram is provided as figure 4. Figure 4 Modified Electrical One line diagram Single Ended Installation 20 Page

21 KFI recommends that a new service meeting the University standards be provided for this facility. The new equipment can be located within the area adjacent to the critical processing space along with the new UPS equipment and generator transfer equipment. The new equipment would be supported from a second pad mount type transformer located adjacent to the existing transformer installation. The new equipment would incorporate RELT maintenance capabilities and would prioritize the critical processing operations in the connection hierarchy. The existing manual transfer switch could be re-utilized to allow the building loads the option of connecting to either side of the Main tie main switchgear. A sketch of this concept electrical one line diagram is provided as figure 5 to illustrate. Figure 5 Electrical One line diagram New Switchgear Main Tie Main 21 Page

22 The generator capacity required for the critical processing operation should be at least 300 KW, based on existing and future loading predictions. A 300 KW unit is expected to be minimal and does not appear to provide the extra 20% capacity as required by the university electrical standards. A unit of up to 500 KW is expected to be able to be installed at this facility within the same space for a small increase in project costs. It is recommended that the 500 KW unit be selected to cover the known loads as well as the unexpected loads. The University Electrical Standards require an additional capacity which the 500 KW generator would provide. Implementation of the new switchgear and larger generator at this time would also allow for future upgrades to the facility in reference to the Uptime Institutes Tier Standards should they chose to do so. A new, 150 KVA capacity, dual conversion UPS system should be provided to support the new processing equipment loads as well as the loads presently supported by individual rack mounted UPS equipment. The UPS power can be distributed through the existing power system which includes an isolation transformer and distribution panelboards. The existing distribution capability and is expected to eventually be quadrupled once the facility processing loads approach the UPS capability. The UPS output power is expected to be distributed twice to each rack, each connection with capacity to support the rack and sourced from a different distribution transformer/panelboard combination. This is beyond the requirements of a tier 1 installation but has been specifically requested by the U of M staff. The UPS power is to be distributed to mimic dual path architecture from the UPS system to the load. Future considerations would allow a second UPS system to connect to half the distribution to develop a higher tier rated support infrastructure and realize increased reliability. A sketch of the proposed generator installation is provided as figure Page

23 Figure 6 Generator Installation with Main Tie Main Switchgear Fire Protection System Recommendations Processing Room The existing double interlock pre-action system for the Processing Room will remain in service. The existing detection/releasing system for the pre-action system is to be evaluated to ensure the best sequence of operation is in place and that it meets the owner s expectations. In addition to the pre-action system, KFI recommends installing a 3M Novec 1230 Clean Agent Fire Suppression System. The system should be sized to deliver a 4.7% concentration of Novec 1230 throughout the protected space. The room is approximately 3,200 sq. ft. with a gypsum board ceiling at 10-0 AFF. With this volume, two 750-pound clean agent cylinders will be provided and located in the adjacent lab room. An addressable UL listed/fm approved fire 23 Page

24 suppression control panel (FSCP) should be provided. The FSCP will include battery backup and be surface mounted in the Processing Room. Included with the clean agent system will be a manual release station and a suppression abort switch at each point of egress. Audio/visual horn/strobe devices must be provided for agent discharge notification inside and directly outside the protected space. A maintenance bypass switch is also provide to prevent agent discharge during maintenance activities. The clean agent system contractor will also provide a portable clean agent extinguisher. The system is required to be connected to, and monitored by, the building fire alarm system. The protected space will need to be properly sealed including all penetrations and cracks. For instance, sweeps and weather stripping will be required around doors. An air sampling detection system will be provided for the Processing Room. Air sampling ports should be provided at minimum spacing of 125 sq. ft. Generator Room There are multiple options to protect the diesel generator room including a wet-pipe fire sprinkler system, pre-action fire sprinkler system, carbon dioxide, compressed air foam, AFFF, water mist, or a hybrid (Vortex) system. The least expensive option is the wet-pipe fire sprinkler system. If selected, the system would be extended from the existing fire sprinkler system. Piping would meet NFPA 13 and the University of Minnesota Standards. Piping 2 and smaller would be black steel, schedule 40; 2 ½ and larger would be black steel schedule 40 or schedule 10. Another option is to extend the existing double interlock pre-action system to the generator room. Piping would meet NFPA 13 and University of Minnesota Standards. Galvanized pipe is required by the University Standards for pre-action systems. The system would be connected to and monitored by the building fire alarm system. A water mist system is what is recommended be installed for the generator room for the following reasons: The space does not have to be sealed. In most cases, the system can extinguish pool fires of diesel fuel. 24 Page

25 Water mist will not damage the generator equipment. Immediate activation of suppression system. Minimal to no water damage. Environmentally safe. Penetrates deep into the seat of the fire. Provides coverage even with obstructions present. Less water usage than fire sprinkler systems. Improved cooling effect from high evaporation rate. Safe for people. Water mist system should be provided and installed as per NFPA 750. UV/IR optical detection should be provided and installed as per the listing for release of the water mist system. A UL Listed/FM Approved fire suppression control panel (FSCP) should be provided and installed in the protected space. A single action emergency release device should also be provided. The manual release device should be located in an accessible location. Items expected to be included with the water mist system are two water mist skids with nitrogen cylinders, these are shown in the generator room in figure 5 above. A maintenance bypass switch will also be included. Audio/visual horn/strobe devices should also be provided for notification. 25 Page

26 Budgetary Considerations Multiple concepts have been explored and presented within this report. Order of magnitude Budgetary costs are presented here with options as discussed with the U of M staff. Please note that for items 1 and 2 below itemized options a, b, and c are offered. Option a is the base and options b and c offer redundancy in differing configurations. Options b and c in these cases are presented as either/or options. 1. Base Tier 1 Design Implementation costs a. Includes 300 KW generator, 100 KVA UPS system upgradeable to 150 KVA with distribution to match existing. Includes install of generator into space with provisions for space repurposing. Includes 2 Upflow DX type a/c units with overhead delivery. Includes 3M Novec 1230 gaseous suppression in processing room, water mist suppression in generator room and extension of the pre-action system through the new electrical equipment room. i. Total Budgetary Cost = $1,550, b. Add redundant DX A/C unit for a total of 3 i. Total Budgetary Cost = $1,650, c. Add redundancy using in row DX A/C units i. Total Budgetary Cost = $2,050, Base Tier 1 Design Implementation costs using CRV A/C systems a. Includes 300 KW generator, 100 KVA UPS system upgradeable to 150 KVA with distribution to match existing. Includes install of generator into space with provisions for space repurposing. Includes 2 Upflow CRV type a/c units with overhead delivery. Includes 3M Novec 1230 gaseous suppression in processing room, water mist suppression in generator room and extension of the pre-action system through the new electrical equipment room. i. Total Budgetary Cost = $1,650, b. Add redundant CRV A/C unit for a total of 3 i. Total Budgetary Cost = $1,850, c. Add redundancy using in row CRV A/C units i. Total Budgetary Cost = $1,950, Recommended Design Implementation costs a. Includes Main-tie-Main electrical service (utility costs excluded) 500 KW generator, 150 KVA UPS system with distribution to match existing. Includes 26 Page

27 install of generator into space with provisions for space repurposing. Includes 2 Upflow CRV type a/c units with overhead delivery and 4 in-row A/C units for redundancy. Includes 3M Novec 1230 gaseous suppression in processing room, water mist suppression in generator room and extension of the pre-action system through the new electrical equipment room. i. Total Budgetary Cost = $2,550, The costs as indicated above only account for the expected facility work, they do not include any utility costs, transformer costs or costs associated with work outside the facility. KFI did reach out to the utility provider for information, however the short nature of this effort conflicted with key personnel schedules and the utility was unable to provide the needed information within the allowed time frame. 27 Page

28 Appendix 1 Uptime Institute Standards 28 Page