1、*USACE / NAVFAC / AFCESA / NASA UFGS-23 84 16.00 20 (November 2008)-Preparing Activity: NAVFAC SupersedingeUFGS-23 84 16.00 20 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated October 2008*SECTION TABLE OF CONTENTSDIVISION 23 - HEATING, VENTILATING, AND
2、AIR CONDITIONINGSECTION 23 84 16.00 20DESICCANT DEHUMIDIFICATION EQUIPMENT11/08PART 1 GENERAL1.1 REFERENCES1.2 RELATED REQUIREMENTS1.3 SUBMITTALSPART 2 PRODUCTS2.1 DESICCANT DEHUMIDIFICATION UNIT2.1.1 Air Handling Components2.1.2 Hot Water Heater2.1.3 Sensible Heat Recovery Devices2.1.3.1 Rotary Whe
3、el2.1.3.2 Heat Pipe2.1.4 Desiccant Wheel2.1.5 Evaporative ChillerPART 3 EXECUTION3.1 PREPARATION3.2 INSTALLATION3.3 FIELD QUALITY CONTROL3.3.1 Preliminary Tests3.3.2 Testing and Balancing3.4 FIELD TRAINING- End of Section Table of Contents -SECTION 23 84 16.00 20 Page 1Provided by IHSNot for ResaleN
4、o reproduction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-23 84 16.00 20 (November 2008)-Preparing Activity: NAVFAC SupersedingeUFGS-23 84 16.00 20 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated October 20
5、08*SECTION 23 84 16.00 20DESICCANT DEHUMIDIFICATION EQUIPMENT11/08*NOTE: This guide specification covers the requirements for natural gas or waste heat fired rotary wheel type dehumidifier utilizing an adsorbing material for a desiccant.Edit this guide specification for project specific requirements
6、 by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate information.Remove information and requirements not required in respective project, whether or not brackets are present.Comments and suggestions on this guide specification are welcome and s
7、hould be directed to the technical proponent of the specification. A listing of technical proponents, including their organization designation and telephone number, is on the Internet.Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR).*NOTE: Desiccant dehumidifiers
8、are delivered from the manufacturer as a complete air handling unit consisting of the casing, fan, sensible heat recovery device and a desiccant wheel. The unit may or may not also include heating and/or cooling coils, evaporative cooling pad, etc. This guide specification covers all components that
9、 may make up a complete desiccant dehumidification unit.*PART 1 GENERAL1.1 REFERENCES*NOTE: This paragraph is used to list the SECTION 23 84 16.00 20 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-publications cited in the text of the guide sp
10、ecification. The publications are referred to in the text by basic designation only and listed in this paragraph by organization, designation, date, and title.Use the Reference Wizards Check Reference feature when you add a RID outside of the Sections Reference Article to automatically place the ref
11、erence in the Reference Article. Also use the Reference Wizards Check Reference feature to update the issue dates.References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process.*The pub
12、lications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS (ASHRAE)ASHRAE 15 (2007; Errata 2007) Safety Code for Refrigerat
13、ionASHRAE 84 (2008) Method of Testing Air-to-Air Heat ExchangersNATIONAL FIRE PROTECTION ASSOCIATION (NFPA)NFPA 70 (2007; AMD 1 2008) National Electrical Code - 2008 EditionNFPA 90A (2008) Standard for the Installation of Air Conditioning and Ventilating Systems1.2 RELATED REQUIREMENTSSection 15050,
14、 “Basic Mechanical Materials and Methods, applies to this section with the addition and modifications specified herein.1.3 SUBMITTALS*NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to reflect only the submittals required for t
15、he project. Submittals should be kept to the minimum required for adequate quality control.A “G” following a submittal item indicates that the submittal requires Government approval. Some submittals are already marked with a “G”. Only delete an existing “G” if the submittal item is not complex and c
16、an be reviewed through the Contractors SECTION 23 84 16.00 20 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Quality Control system. Only add a “G” if the submittal is sufficiently important or complex in context of the project.For submittals
17、requiring Government approval on Army projects, a code of up to three characters within the submittal tags may be used following the “G“ designation to indicate the approving authority. Codes for Army projects using the Resident Management System (RMS) are: “AE“ for Architect-Engineer; “DO“ for Dist
18、rict Office (Engineering Division or other organization in the District Office); “AO“ for Area Office; “RO“ for Resident Office; and “PO“ for Project Office. Codes following the “G“ typically are not used for Navy, Air Force, and NASA projects.Choose the first bracketed item for Navy, Air Force and
19、NASA projects, or choose the second bracketed item for Army projects.*Government approval is required for submittals with a “G“ designation; submittals not having a “G“ designation are for Contractor Quality Control approval.for information only. When used, a designation following the “G“ designatio
20、n identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:SD-03 Product Data*Note: Indicate sound ratings or loudness level of equipment in the Equipment Schedule on the drawings.*Desiccant Deh
21、umidification UnitSD-06 Test ReportsFilter sectionsPreliminary testsDampers leakage testSD-07 CertificatesDesiccant dehumidification unitSD-10 Operation and Maintenance DataDesiccant dehumidification unit, Data Package 5Submit in accordance with Section 01 78 23 OPERATION MAINTENANCE DATA.SECTION 23
22、 84 16.00 20 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-PART 2 PRODUCTS2.1 DESICCANT DEHUMIDIFICATION UNIT2.1.1 Air Handling ComponentsAll air handling components of the desiccant dehumidification unit (casing, dampers, fans vibration isol
23、ation, filter sections, mixing boxes, outside air intake, heating cooling sections roof curbs and corrosion criteria as applicable) shall meet the requirements of Section 23 00 00 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEMS. Units shall include humidity controls (humidistat) and tempe
24、rature controls (thermostat).2.1.2 Hot Water HeaterHot water heater shall meet the requirements of Section 23 52 43.00 20 LOW PRESSURE WATER HEATING BOILERS UNDER 800,000 BTU/HR OUTPUT, with an atmospheric-type gas burner.2.1.3 Sensible Heat Recovery Devices2.1.3.1 Rotary Wheel*NOTE: Select minimum
25、acceptable energy transfer effectiveness and maximum acceptable cross-contamination. Delete moisture resistance and chain drive if not required.*Unit shall be a factory fabricated and tested assembly for air-to-air energy recovery by transfer of sensible heat from exhaust air to supply air stream. D
26、evice performance shall be according to ASHRAE 84. Device shall deliver energy transfer effectiveness of not less than 70 85 _ percent with cross-contamination not in excess of 0.1 1.0 _ percent of exhaust airflow rate at system design differential pressure. Exchange media shall be chemically inert,
27、 moisture resistant, fire-retardant, laminated, nonmetallic material which complies with NFPA 90A. Exhaust and supply stream shall be isolated by seals which are static, field adjustable, and replaceable. Chain drive mechanisms shall befitted with racheting torque limiter or slip-clutch protective d
28、evice. Enclosure shall include maintenance access provisions. Recovery control and rotational failure provisions shall be as indicated.2.1.3.2 Heat Pipe*NOTE: Schedule should include face air velocity, static pressure drop, temperature requirements for entering and leaving air or exhaust streams. De
29、lete flexible connectors if not required.*Device shall be a factory fabricated, assembled and tested, counterflow arrangement, air-to-air heat exchanger for transfer of sensible heat between exhaust and supply airstreams. Device shall deliver an energy transfer effectiveness not less than that indic
30、ated without cross-contamination. Heat exchanger tube core shall be 15 18 25 mm SECTION 23 84 16.00 20 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1/2 5/8 one inch nominal diameter, seamless aluminum or copper tube with extended surfaces, u
31、tilizing wrought aluminum Alloy 3003 or Alloy 5052, temper to suit. Maximum fins per unit length and number of tube rows shall be as indicated. Tubes shall be fitted with internal capillary wick, filled with an ASHRAE 15, Group 1 refrigerant working fluid, selected for system design temperature rang
32、e, and hermetically sealed. Heat exchanger frame shall be constructed of not less than 1.6 mm 16 gage galvanized steel intermediate tube supports, and flange connections. Tube end-covers and a partition of galvanized steel to separate exhaust and supply air streams without cross-contamination shall
33、be provided. A drain pan constructed of welded Type 300 series stainless shall be provided. Heat recovery regulation shall be provided by system face and bypass dampers and related control system as indicated interfacing with manufacturers standard tilt-control mechanism for summer/winter operation,
34、 regulating the supply air temperature and frost prevention on weather face of exhaust side at temperature indicated. Coil shall be fitted with pleated flexible connectors.2.1.4 Desiccant WheelSupply and regeneration airstreams shall be counterflow. The dehumidifier shall be a rotary type designed f
35、or continuous operation. The wheel structure shall be of the extended surface type in the axial flow direction and the geometry shall provide for laminar flow over the operating range for minimum air pressure differentials. The dehumidifier shall be complete with a drive system utilizing a fractiona
36、l-horsepower electric motor and speed reducer assembly driving the rotor. A slack-side tensioner shall be included for automatic take-up for belt-driven wheels. The desiccant material shall be an adsorbing type. The desiccant material shall be applied to the wheel such that the entire surface is act
37、ive as a desiccant and the desiccant material does not degrade or detach from the surface of the wheel. The wheel shall be fitted with full-face, low-friction contact seals on both sides to prevent cross leakage. The rotary structure shall have underheat, overheat and rotation fault circuitry. The w
38、heel assembly shall be warranted for a minimum of five years.2.1.5 Evaporative ChillerEvaporative chiller shall meet the requirements of Section 23 76 00.00 20 EVAPORATIVE COOLING SYSTEMS.PART 3 EXECUTION3.1 PREPARATIONProvide storage for equipment and materials at the project site. Parts shall be r
39、eadily accessible for inspection, repair, and renewal. Protect materials and equipment from weather.3.2 INSTALLATIONInstall desiccant dehumidification equipment as indicated and in accordance with the manufacturers instructions. Provide clearance for inspection, repair, replacement, and service. Ele
40、ctrical work shall conform with NFPA 70 and Division 16, “Electrical“. Provide overload protection in the operating disconnect switches and magnetic starters. Locate outside air intake at a minimum of 8 meters 25 feet from industrial stacks, bathroom vents, and sanitary risers. Prevailing wind direc
41、tion shall not be used as justification for placing air intake closer than 8 meters 25 feet of SECTION 23 84 16.00 20 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-exhaust stacks. Install assembled units on vibration isolators. Bolt sections
42、together in high pressure units. Pipe drain pan to nearest floor drain.3.3 FIELD QUALITY CONTROLSchedule and administer specified tests. Provide personnel, instruments and equipment for such tests. Correct defects and repeat the respective inspection and tests. Give the Contracting Officer ample not
43、ice of the dates and times scheduled for tests and trial operations. Conduct inspection and testing in the presence of the Contracting Officer.InspectionPrior to initial operation, inspect equipment installation for conformance with drawings and specifications.3.3.1 Preliminary TestsFor each item of
44、 air handling and distribution equipment and its components, perform an operational test for a minimum period of 4 _ hours.3.3.2 Testing and BalancingAfter preliminary tests, perform air handling and distribution equipment tests adjustment, and balancing in accordance with Section 23 05 93 TESTING, ADJUSTING AND BALANCING.3.4 FIELD TRAININGThe contractor shall conduct a training course for operating and maintenan
