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The notes explain using building automation systems (BAS) for major HVAC equipment and break down air side, water side, refrigeration, heat rejection, and controls, including centralized system examples and diagram 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HVAC-related roles are described for HVAC system projects?","Question",{"text":63,"@type":64},"The material lists a HVAC system designer for conceptual design and tendering support, controls vendor sales representatives, mechanical and electrical contractors for installation, controls contractors for control-system details, and facility managers/operators for operation and maintenance.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How is a typical HVAC system divided into sub-systems and components?",{"text":68,"@type":64},"It breaks the system into air side (e.g., outdoor air intake, preheater, filter, cooling/heating coils, humidifier, fan, duct, air terminal), refrigeration side (refrigeration machine or chiller), water side (pumps and water piping), heat rejection (cooling tower), and heating side (boiler and auxiliaries plus piping).",{"name":70,"@type":61,"acceptedAnswer":71},"What does the document indicate about using BAS to control major HVAC systems?",{"text":72,"@type":64},"It explains that BAS can be used to control major HVAC systems and equipment, including centralized, partially centralized, and local HVAC systems, with examples and referenced control diagrams and EMS components using direct digital control.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},656618,1793006716,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,101,105,110,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & 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\nIr Dr. Sam C. M. Hui  \nDepartment of Mechanical Engineering The University of Hong Kong E-mail: cmhui@hku.hk  \nNov 2023  \n\n|  |  |\n| --- | --- |\n| \u003Cbr>Contents \u003Cbr>|  |\n| • HVAC sub-systems\u003Cbr>• DDC system design\u003Cbr>• DDC controllers\u003Cbr>• HVAC control examples\u003Cbr>• Central plant optimization | |\n\n\n| HVAC sub-systems | |  |\n| --- | --- | --- |\n| • Key personnel for HVAC system projects:\u003Cbr>• HVAC system designer\u003Cbr>• Responsible for conceptual design, tendering, etc.\u003Cbr>• Controls vendor sales representative\u003Cbr>• Provide advice on control products & features |  | \u003Cbr>Design, plan, specification |\n| • Mechanical & electrical contractors\u003Cbr>• Installation of mechanical & electrical parts\u003Cbr>• Controls contractor\u003Cbr>• Details of control system + part of the installation |  | \u003Cbr>Installation |\n| • Facility managers & operators\u003Cbr>• Operation & maintenance | \u003Cbr>Operation, monitoring |  |\n\nUsing BAS to control major HVAC systems & equipment  \n[Source: Johnson Controls]  \n\n| HVAC sub-systems | |\n| --- | --- |\n| • HVAC sub-systems & components:\u003Cbr>• 1. Air-side ([e.g. fans](e.g. fans), air duct)\u003Cbr>• 2. Water-side (e.g. pumps, piping)\u003Cbr>• Chilled water, condenser water, seawater, etc.\u003Cbr>• 3. Refrigeration equipment\u003Cbr>• 4. Heat rejection (e.g. cooling towers)\u003Cbr>• 5. Controls\u003Cbr>• Including centralised, partially centralised & local HVAC systems |  |\n\nExample of a centralised HVAC system  \nAir-side equipment  \nWater-side equipment  \n(Source: [http://www.allhvacinfo.com/](http://www.allhvacinfo.com/))  \n\n| A space-conditioning air-conditioning system (fan-coil system) |\n| --- |\n| \u003Cbr> Air side \u003Cbr>\u003Cbr>Condenser water\u003Cbr>\u003Cbr>Refrigeration\u003Cbr>\u003Cbr>\u003Cbr>Heat rejection\u003Cbr>\u003Cbr>\u003Cbr>Chilled water\u003Cbr>|\n| (Source: Wang, S. K., Lavan, Z. and Norton, P., 2000. Air Conditioning and Refrigeration Engineering) |\n\nHVAC sub-systems & components  \n\n| Air side:\u003Cbr>1. Outdoor air intake (screen, louvers, dampers)\u003Cbr>2. Preheater\u003Cbr>3. Return air intake (dampers)\u003Cbr>4. Filter\u003Cbr>5. Cooling coil\u003Cbr>6. Dehumidifier\u003Cbr>7. Heating coil\u003Cbr>8. Humidifier\u003Cbr>9. Fan\u003Cbr>10.Duct system\u003Cbr>11.Air outlet\u003Cbr>12.Air terminal (with outlet) | Refrigeration side:\u003Cbr>1. Refrigeration machine or chiller (compressor, condenser, cooler and refrigerant piping)\u003Cbr>Water side:\u003Cbr>1. Pumps\u003Cbr>2. Water piping\u003Cbr>Heat rejection:\u003Cbr>1. Cooling tower\u003Cbr>Heating side:\u003Cbr>1. Boiler & auxiliaries\u003Cbr>2. Piping (hot water or steam) |\n| --- | --- |\n\nAir-side & control sub-systems for a typical floor of a HVAC system  \nControl diagram  \nAHU = air handling unit DDC = direct digital control  \n(Source: Wang, S. K., Lavan, Z. and Norton, P., 2000. Air Conditioning and Refrigeration Engineering)  \nComponents of a energy management system (EMS) with direct digital control (DDC)","cbCaihu9CP97IvDE","https://ap.wps.com/l/cbCaihu9CP97IvDE","pdf",6707616,66,"English","# HVAC sub-systems\n## DDC system design\n## DDC controllers\n## HVAC control examples\n## Central plant optimization","[{\"question\":\"What HVAC-related roles are described for HVAC system projects?\",\"answer\":\"The material lists a HVAC system designer for conceptual design and tendering support, controls vendor sales representatives, mechanical and electrical contractors for installation, controls contractors for control-system details, and facility managers/operators for operation and maintenance.\"},{\"question\":\"How is a typical HVAC system divided into sub-systems and components?\",\"answer\":\"It breaks the system into air side (e.g., outdoor air intake, preheater, filter, cooling/heating coils, humidifier, fan, duct, air terminal), refrigeration side (refrigeration machine or chiller), water side (pumps and water piping), heat rejection (cooling tower), and heating side (boiler and auxiliaries plus piping).\"},{\"question\":\"What does the document indicate about using BAS to control major HVAC systems?\",\"answer\":\"It explains that BAS can be used to control major HVAC systems and equipment, including centralized, partially centralized, and local HVAC systems, with examples and referenced control diagrams and EMS components using direct digital control.\"}]","MEBS6005 Building Automation Systems - Control of HVAC Systems - Lecture notes | PDF",1792969660,166]