HVAC DDC Open Systems. Frank Shadpour, P.E. SC Engineers, Inc.

Transcription

1 HVAC DDC Open Systems Frank Shadpour, P.E. SC Engineers, Inc.

2 Frank Shadpour, P.E. President of SC Engineers, Inc. ASHRAE Fellow ASHRAE TC 1.4 Past President - ASHRAE Instructor - UCSD USC Graduate Author of Fundamentals of HVAC DDC

3 Our Distinguished Guests Sara Page Rady Children s Hospital James Page Amylin Pharmaceuticals Mike Tarantino Poway School District Jason Lawrence Advanced Media Works

4 HVACDDC.com

5 The Book Overview DDC Open Systems Global Commissioning Online Training Panel Discussion Agenda

6 The Book Overview The Book Overview DDC Open Systems Global Commissioning Online Training Panel Discussion

7 The Book Overview A. The basics 1,2,3 B. DDC Networking 4,5,6 C. Hybrid Systems 7,8 D. Control Components 9,10,11 E. Practical Scenarios 12,13,14,15 F. Specifying DDC 16,17

8 DDC Open Systems Chapter 4, 5 and 6. The Book Overview DDC Open Systems Global Commissioning Online Training Panel Discussion

9 The Big Questions 1. Can I use an Open DDC system for my new facility? 2. Can I use an Open DDC system for my new addition? 3. Can I upgrade my existing DDC system to Open? 4. Can I utilize open DCC system for commissioning?

10 The Big Questions 1. Can I use an Open DDC system for my new facility? 2. Can I use an Open DDC system for my new addition? 3. Can I upgrade my existing DDC system to Open? 4. Can I utilize Open DCC system for commissioning?

11 Evolution of BAS HVAC DDC Evolution 1980 s System GPC s Protocol None 1990 s 2000 s 2010 s ASC s Networking Web Services Proprietary Open & Proprietary Open Web Services are selfcontained, modular applications that can be run over the Internet and can be integrated into other applications.

12 DDC - Open vs. Closed Type Open Closed Proprietary LonWorks Well-known Manufactures Non- Proprietary BACnet?

13 A BACnet Solution Model Native BACnet SOAP: Simple object Access protocol. A protocol that provides a standardized ML envelop for carrying application specific ML payloads. Native BACnet

14 BACnet o o o o BACnet Web-Services supersedes BACnet/IP BACnet/IP: Or BACnet Conveys messages between BACnet LAN via IP using a technique called Tunneling. It supersedes BACnet 95. PICS: Protocol Implementation Conformance Statement. The capabilities of any particular device that should accompany that device. BIBBs: BACnet Interoperability Building Blocks. Each BIBB states what BACnet feature must be implemented for client or server to achieve communication. B-ASC and B-AAC are standard BIBB replacements.

15 BACnet Resources o o o o o ASHRAE SPC 135, BTL BACnet Testing Laboratory, ASHRAE Guideline ,Specifying Direct Digital Control Systems obi Open Building Information Exchange OASIS: Organization for the Advancement of Structured Information Standards

16 What is obi BACnet/IP: Or BACnet Conveys messages between BACnet LAN via IP using a technique called Tunneling. It supercedes BACnet 95. "Open Building Information Change" PICS: Protocol Implementation Conformance Statement. The capabilities of any particular device that should accompany that device. BIBBs: BACnet Interoperability Building Blocks. Each BIBB states what BACnet feature must be implemented for client or server to achieve communication. B-ASC and B-AAC are standard BIBB replacements. OASIS: Organization for the Advancement of Structured Information Standards

17 A LonWorks Solution Model LonTalk A Router is intelligent hardware that filters the passing of message between two network segments. LonTalk LonTalk

18 LonWorks LonWorks: is a family of hardware products developed by the Echelon Corporation LonTalk: is the communication protocol for LonWorks networks. Similar to Ethernet LonTalk is CSMA. However, does not have CD. LonMark: is a brand name and an association formed in 1994 to promote and support those manufacturers that produce LonWorks products

19 What is PLC? PLCs are miniature industrial computers that contain hardware and software that is used to perform control functions. A PLC consists of two basic sections: the central processing unit (CPU) and the input/output interface system.) The first PLC can be traced back to 1968 when Bedford Associates, a company in Bedford, MA, developed a device called a Modular Digital Controller for General Motors (GM)..

20 PLC, DDC or PAC? PLC Programmable Logic Controller DDC/ PC Direct Digital Controller PAC Programmable Automation Controller 1. Real Time Operating System 2. Predefined Fixed Software 3. Rugged Mechanical Package 4. Limited Applications 5. Simple control process 6. No Motion Control 1. General Purpose 2. Easy Expansion 3. Commercial Use 4. Larger Memory Expansion 5. Windows Application 6. Not as Reliable 1. Real Time Operating System 2. Industrial Use 3. Rugged Mechanical Package 4. Reliable 5. Easy to expand 6. Large Central Plants RS Logic 500 PLC National Instrument PLC Fandom RS Christmas Light PLC Ladder Logic HVAC DDC

21 Global Commissioning The Book Overview DDC Open Systems Global Commissioning Online Training Panel Discussion

22 Using DDC as a Commissioning Tool Green Building Management Preventive Maintenance Trouble Shooting What is beyond?

23 Commissioning Phases & Steps Phase Phase 1 Phase 2 Phase 3 Phase 4 Phase 5 Step Pre-design design Const. Accept. Post Accept. Step 1 Plan Step 2 Schedule Step 3 Basis of Design Verification Step 4 Procedures Step 5 Shop Drawings Verification Step 6 Installation Verification Step 7 DDC Cx Verification Step 8 Start up Verification Step 9 Functional Performance Test Step 10 Training Verification

24 Open Solution for energy Efficiency Certification Level Certified Silver Gold Platinum 52 & Up GREEN is Money Money is GREEN! Building Automation System strategies can be applied to approximately 40% of the criteria of the U.S. Green Building Council s Leadership in Energy & Environmental Design (LEEDTM). Energy Efficiency Through Commissioning Creates a Better World

25 Online Training The Book Overview DDC Open Systems Global Commissioning Online Training Panel Discussion

26 LonWorks Lessons Learned Do s Define Interoperability Goals Don ts General Definition of LonWorks Lon over IP backbone Coordinate with IS admin Flexible Field bus architecture Ownership of tools and licenses Responsibility for integration Generic open specification Clear Sequence of Operation LonMark Certified Devices Lon Object list Vender specific Architecture Assume stand alone system Specify only one method Access only by one vender Specify in two places Vender s hooks Generic sequences LonMark Compatible Devices Generic interfaces

27 BACnet - Lessons Learned Do s Define Interoperability Goals BACnet / IP backbone Coordinate with IS admin Flexible field bus architecture Ownership of tools and licenses Responsibility for integration Generic open specification Clear Sequence of Operation BLT certified devices BACnet object list Don ts General Definition of BACnet Vendor specific architecture Assume stand alone system Specify only one method Access only by one vendor Specify in two places Vendor s hooks Generic sequences BACnet compatible devices Generic interfaces

28 Specialized Certificate Design and Control of HVAC Systems HVAC System Design April 2007 HVAC DDC Basics Online June HVAC Design Calculations Sep HVAC DDC Systems Design March 2008 HVAC DDC Networking June

29 Panel Discussion The Book Overview DDC Open Systems Global Commissioning Online Training Panel Discussion

30 HVAC DDC Open Systems Frank Shadpour, P.E. SC Engineers, Inc.