1、07-02M 15819-1 SECTION 15819 ENERGY RECOVERY EQUIPMENT SPEC WRITER NOTE: Delete between /-/ if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. DESIGNER NOTES: 1. This specification has links connected to other documents in
2、 VA “Technical Information Library (TIL).” These links are to facilitate designers to look into related documents while edited this specification. These links must be deleted before the specification is finalized for a particular project. To delete these links make sure macros are installed on your
3、system, and if not do the following: Click on Tools. Go to Macro and click on Security. Check the Medium Security Level. Close the specification, if open. Open the specification (again) and follow the prompts on the screen. Click on Enable Macros when first prompt appears. Delete the links only if s
4、pecification is ready to be included in the project. 2. Coordinate VA Standard Details with this spec section and show them on the drawings as applicable: 3. HVAC Pumps Schedule Detail No.15140-3.DWG. 4. Typical Piping Connections to In-Line Water Pumps, Detail no. 15705-11.DWG. 5. Energy Recovery,
5、Run around Water Coil Schedule, Detail No.15819-1.DWG. 6. Air to Air Plate Heat Exchanger Schedule, Detail No. 15819-2.DWG. 7. Rotary Air to Air Heat Exchanger Schedule, Detail No. 15819-3.DWG. 8. See CD-54 for wind velocity requirements in coastal areas. Equipment installed outdoor shall withstand
6、wind forces stated in CD-54. 9. Follow manufacturers written instructions carefully for ductwork layout required for heat recovery equipment 10. VA normally does not recommend use of Rotary Air-to Air Heat Exchangers. Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
7、se from IHS-,-,-07-02M 15819-2 Discuss its use with VA before specifying it. PART 1 - GENERAL 1.1 DESCRIPTION A. Air-to-Air Heat Pipe Heat Exchanger: Unit transfers assembled heat via heat pipes without any moving parts. B. Rotary Air-to-Air Heat Exchanger: Unit transfers sensible and latent heat. T
8、his exchanger, popularly called a heat wheel, is a revolving cylinder, filled with an air permeable medium with a large internal surface area for intimate contact with the air passing through it. C. Air-to-Air Plate Heat Exchanger: Unit transfers sensible heat via metal plates without any moving par
9、ts. D. Run around Heat Exchangers. 1.2 RELATED WORK A. Section 01010, GENERAL REQUIREMENTS: Requirements for pre-test of equipment. B. Section 13081, SEISMIC RESTRAINT REQUIREMENTS FOR NON STRUCTURAL COMPONENTS: Seismic requirements for non-structural equipment. C. Section 15050, BASIC METHODS AND R
10、EQUIREMENTS (MECHANICAL): General mechanical requirements and items, which are common to more than one section of Division 15. D. Section 15140, PUMPS (HVAC): Requirements for pumping equipment. E. Section 15250, INSULATION: Requirements for piping insulation. F. Section 15705, HVAC PIPING SYSTEMS:
11、Requirements for piping for expansion tanks. G. Section 15750, HEATING AND COOLING COILS: Requirements for run-around system coils. H. Section 15840, DUCTWORK AND ACCESSORIES: Requirements for sheet metal ducts and fittings. I. Section 15885, AIR FILTERS: Requirements for filters used before heat re
12、covery coils. J. Section 15902, CONTROLS AND INSTRUMENTATION (DDC): Requirements for controls and instrumentation. K. Section 15980, TESTING, ADJUSTING AND BALANCING: Requirements for testing, adjusting and balancing of HVAC system. Provided by IHSNot for ResaleNo reproduction or networking permitte
13、d without license from IHS-,-,-07-02M 15819-3 1.3 QUALITY ASSURANCE A. Refer to paragraph, GUARANTEE in specification Section 01001, GENERAL CONDITIONS. B. Refer to specification Section 01010, GENERAL REQUIREMENTS for performance tests and instructions to VA personnel. C. Refer to paragraph QUALITY
14、 ASSURANCE in specification Section 15050 BASIC METHODS AND REQUIREMENTS (MECHANICAL D. Performance Criteria: Heat recovery equipment shall be provided by a manufacturer who has been manufacturing such equipment and the equipment has a good track record for at least 5 years. E. Performance Test: In
15、accordance with PART 3. 1.4 SUBMITTALS A. Submit in accordance with Section 01340, SAMPLES AND SHOP DRAWINGS. B. Manufacturers Literature and Data: 1. Heat Pipe Heat Exchanger 2. Rotary Heat Exchanger 3. Plate Heat Exchanger 4. Run-Around Energy Recovery System C. Certificate: Submit, simultaneously
16、 with shop drawings, an evidence of satisfactory service of the equipment on three similar installations. D. Submit type, size, arrangement and performance details. Present application ratings in the form of tables, charts or curves. E. Provide installation, operating and maintenance instructions, i
17、n accordance with Article, INSTRUCTIONS, in Section 01010, GENERAL REQUIREMENTS. 1.5 APPLICABLE PUBLICATIONS A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. B. Air Conditioning and
18、 Refrigeration Institute (ARI) ARI 1060-2001.Rating Air-to-Air Energy Recovery Ventilator Equipment C. American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE): 84-91.Method of Testing Air-to-Air Heat Exchanges including Addenda to year 2001 Provided by IHSNot for ResaleNo
19、reproduction or networking permitted without license from IHS-,-,-07-02M 15819-4 15-94.Safety Code for Mechanical Refrigeration D. American Society for Testing and materials (ASTM) D635-98.Standard Test Method for Rate of Burning and/ or Extent and Time of Burning of Plastics in a Horizontal Positio
20、n E84-01Standard Test method for Surface Burning Characteristics of Building Materials E. Underwriters Laboratories, Inc (UL) 1812-95.UL Standard for Safety Ducted Heat Recovery Ventilators 1815-95.UL Standard for Safety Non-Ducted Heat Recovery Ventilators PART 2 - PRODUCTS 2.1 AIR-TO-AIR HEAT PIPE
21、 HEAT EXCHANGERS A. Comply with UL Standards B. Thermal recovery units shall be capable of operating at temperatures ranging from a minimum of -29 degrees C (-20 degrees F) to a maximum of 49 degrees C (120 degrees F). The heat transfer between air streams shall take place in a counterflow arrangeme
22、nt. The unit shall have no moving part and shall be one piece construction. C. Tube core shall be either 18-mm (5/8 inch) or 25-mm (1 inch) OD seamless aluminum tubing permanently expanded into the fins to form a firm, rigid and complete metal pressure contact between the tube and fin collar of all
23、operating conditions. Provide copper tubes and copper fins for corrosive air streams. D. Secondary surfaces shall be of continuous plate type aluminum fins, 0.18 mm (0.007 inch) thick, and of corrugated design to produce maximum heat transfer efficiencies. E. Basic capillary wick shall be an integra
24、l part of the inner wall of the tube and provide a completely wetted surface for maximum heat pipe capacity with minimum heat transfer resistance. F. Refrigerants used shall be approved by EPA. G. Provide a vertical partition to isolate the exhaust and supply airstreams from each other, so that ther
25、e will be no cross-contamination. Partition shall be a minimum of 1.9 mm (14 gage) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-07-02M 15819-5 galvanized steel. Provide stainless steel casing for corrosive air streams. H. Casing shall be a minimum
26、 of 1.9 mm (14 gage) galvanized steel. I. End covers shall be a minimum of 1.0 mm (20 gage) galvanized steel. J. Provide a mechanism so that the unit can be tilted for summer-winter operation. Actuator used to tilt the unit shall be pneumatic or electric. Provide control panels and sensing bulbs as
27、shown on the drawings. SPEC WRITER NOTE: Show control panels and sensing bulbs on drawings K. Provide flexible connectors for each side of the unit. The flexible connector shall be fabricated in a manner that will allow the unit to tilt without binding. 2.2 ROTARY AIR-TO-AIR HEAT EXCHANGER: A. Compl
28、y with UL Standards. B. Exchanger Rotor or Wheel: Provide aluminum transfer media, flame spread rating of not more than 25 and smoke developed rating of not more than 50 and shall be independently tested in accordance with ASTM standard E-84. Rotor media shall be independently tested in accordance w
29、ith ASHRAE Standards. It shall allow laminar flow (but not radial) at usual velocities and prevent leakage, bypassing and cross contamination by cross flow within wheel. Size the transfer media to allow passage of 300 micron particles without fouling or clogging. When latent heat transfer is require
30、d, treat media with non-degrading desiccant that is bacteriostatic, non-corroding and non-toxic. No asbestos material will be allowed. Wheel shall not condense water directly or require a condensate drain for summer or winter operation. Performance rating shall be in accordance with ARI Standard 106
31、0. C. Provide casing seals on periphery of rotor as well as on duct divider and purge section. Seals are to be adjustable, of extended life materials and effective in limiting air leakage. D. Wheel shall be supported by ball or roller bearings and belt driven by a fractional horsepower, totally encl
32、osed, NEMA Standard motor through a close coupled positively lubricated speed reducer, or gear/chain speed reduction. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-07-02M 15819-6 1. Where constant speed wheel is indicated on the drawings provide an
33、 AC motor. 2. Where variable speed wheel is indicated on the drawings, exchanger wheel speed and leaving temperature control shall be achieved by means of a variable speed drive. Operation shall be from 115/1/60 and by a proportioning temperature controller which varies output voltage of a silicon c
34、ontrolled rectifier (SCR) to a rectified power motor which will change speed in proportion to changes of voltage to its armature. Include an adjustable thermoswitch for automatic changeover for summer-winter operation. Set point of adjustable proportioning temperature controller and thermoswitch sha
35、ll be indicated on visible scale. System shall be capable of speed reduction down to 5 percent of capacity while maintaining adequate torque at any point of operation to rotate wheel. E. Provide an automatic, factory built-in, field adjustable purge to limit exhaust air carry-over to less than 1.0 p
36、ercent of rated volume. Purge shall be effective when static pressure difference between supply and exhaust is 125 Pa (one-half, inch wg) or greater, and it shall have provision for restriction or adjustment to limit purge air volume to not over five percent of rated air flow when a static pressure
37、difference up to 2.5 kPa (10 inch wg) exists. F. Unit shall be constructed of heavy gage steel to insure rigidity and stability. Casing side panels shall be removable to insure easy access to internal parts. Provide integral flanges for flanged duct connection and provide lifting holes or lugs. 2.3
38、AIR-TO-AIR PLATE HEAT EXCHANGER A. Comply with UL Standards. B. Plates: Corrugated 0.53 mm (0.021 inch) diamond embossed aluminum spacing as recommended by the manufacturer. C. Bedding: Thermosetting reinforced resin. Provide plate seal-off and passage separation at top, bottom and center divider. T
39、he resins shall be self-extinguishing type in accordance with ASTM D635. D. Casing and End Strips: Casing of 1.6 mm (16 gage) galvanized steel in accordance with NFPA. Provide stainless steel casing where corrosive air streams is present. End strips of the same material as exchanger plates. Ends of
40、unit exchanger plates to be sealed with high temperature silicon Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-07-02M 15819-7 sealant prior to installation of end strip for corrosive air streams provide welded end strips to avoid cross contaminatio
41、ns. E. Provide integral flanges for flanged duct connections and provide lifting holes or lugs. F. Provide drain pan with drains. G. Accessories: Furnish where indicated on the drawings. 1. Face and bypass dampers: Manufacturers standard, complete with operators, to automatically divert all or part
42、of the outdoor air around the exchanger when the need to recover heat is reduced. 2. Provide factory installed controls to operate face and by-pass dampers during summer and winter. 3. Suspension mounting frame: Manufacturers standard. 4. Roof mounting curb: Manufacturers standard. /5. Provide a fac
43、tory installed defrost system. The defrost system shall be capable of maintaining at least 85 percent of the non-frosted performance at -29 degrees C (-20 degrees F). / 2.4 RUN-AROUND ENERGY RECOVERY SYSTEM (RAERS) A. Provide a field fabricated system, as shown, containing coils, piping and _percent
44、 glycol, pumps, insulation and accessories. B. Provide automatic temperature controls and sequence of operations as shown on drawings. C. Comply components of RAERS with specification sections noted below: 1. Section 15140, PUMPS 2. Section 15250, INSULATION 3. Section 15705, PIPING AND ACCESSORIES
45、4. Section 15750, COILS 5. Section 15902, CONTROLS 6. Section 15980, TESTING, ADJUSTING AND BALANCING 2.5 AIR FILTERS Air filters, 35 percent efficiency minimum, as indicated on the drawings and as specified in specification Section 15885, AIR FILTERS. PART 3 - EXECUTION 3.1 INSTALLATION A. Follow t
46、he equipment manufacturers instructions for handling and installation, and setting up of ductwork for makeup and exhaust air steamers for maximum efficiency. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-07-02M 15819-8 B. Rotary AIR-TO-AIR Exchange
47、r: Adjust seals and purge as recommended by the manufacturer. Verify correct installation of controls. C. Seal ductwork tightly to avoid air leakage. D. Provide adequate spacing and access for cleaning and maintenance of heat recovery coils as well as filters. /E. Provide Seismic bracing for heat re
48、covery equipment in the Seismic area as per specification Section 13081 SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS. / /F. Secure outdoor heat recovery equipment to withstand a wind velocity of _kmph (_mph)./ 3.2 TEST AND STARTUP SERVICE A. Performance tests as per manufacturers wri
49、tten instructions for proper and safe operation of the heat recovery system. B. Furnish test reports to the Senior Resident Engineer in accordance with specification Section 01010, GENERAL REQUIREMENTS. 3.3 INSTRUCTIONS Provide services of manufacturers technical representative for four hours to instruct VA personnel in operation and maintenance of heat recovery equipment. - - - E N D - - - Provided by IHSNot for Resale
