MODIFICATION
41 -- Desiccant Dehumidifiers
- Notice Date
- 6/23/2005
- Notice Type
- Modification
- NAICS
- 333415
— Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
- Contracting Office
- DHS - Direct Reports, United States Coast Guard (USCG), Commanding Officer, USCG Aircraft Repair & Supply Center, HU25, HH65, H60J, C130, EISD, 130J or Support Procurement Building 79, 75, 79, 78, 78, 19 or 63, Elizabeth City, NC, 27909-5001
- ZIP Code
- 27909-5001
- Solicitation Number
- HSCG38-05-Q-500017
- Response Due
- 7/8/2005
- Archive Date
- 7/23/2005
- Point of Contact
- Darlene Tucker, EISD Contract Specialist, Phone 252-335-6204, Fax 252-335-6452,
- E-Mail Address
-
DHTucker@arsc.uscg.mil
- Description
- Modification 1 - Solicitation Number HSCG38-05-Q-500017 is hereby amended to incorporate specifications as follows: Desiccant Dehumidifiers Specifications The United States Coast Guard desires desiccant dehumidifiers to determine the effectiveness of humidity control in mitigating corrosion and improving avionics reliability of operational USCG aircraft. The desiccant dehumidifiers will be used on the following aircraft: C-130 aircraft in Elizabeth City, NC. These specifications describe the minimum anticipated operational and performance requirements of the desiccant dehumidifier. SCOPE The contractor shall provide two desiccant dehumidifiers capable of producing continuous dehumidified air with constant humidity and temperature for a given inlet condition. One dehumidifier shall include a pre-cooling system to precondition the ambient air before entering the process inlet of the dehumidifier. The second dehumidifier shall include a pre-cooling and post-cooling system. The post cooling system limits the temperature of the process outlet air being delivered to the conditioned space. The dehumidifier shall be a two-compartment type utilizing desiccant media in a process and reactivation chamber. The dehumidifiers shall be fully factory assembled package units, complete with reactivation heaters, filters, motors, fans, desiccant rotor and rotor drive assembly, access panels, volume dampers, weatherproof electrical enclosures and all necessary controls for proper unattended operation of the system. The dehumidifier shall be capable of operating using a humidistat. The unit casing, air plenums and ducts shall be constructed of continuously welded aluminum to insure air and vapor tight construction. The access panels shall include vapor proof gasketing and allow for simple service and inspection. The unit shall have weather and U.V. resistant paint over the exterior. Independent pressure gauges for indication of process and reactivation airflow rates shall be included. This is an all-or-none solicitation. The government intends to award a contract resulting from this solicitation to the contractor whose proposal, in the government’s estimation, represents the best value after evaluation in accordance with the factors in the solicitation. REQUIREMENTS The time of delivery is essential. The required date of delivery shall be no later then 12 weeks after the contractor receives notice of award. The point of delivery shall be: US Coast Guard Aircraft Repair and Supply Center, Weeksville Road, Elizabeth City, North Carolina, 27909. 1.0 GENERAL 1.1 Process Air Capacity: 750 SCFM (Standard Cubic Feet per Minute) 1.2 Minimum Moisture Removal: 52.55 lbs/hr 1.3 Single point power entry: 208-230 volts/3 phase/60 Hertz 1.4 The start/stop function of the unit shall be accomplished by the use of an external humidistat, hardwire or wireless, with provisions for its connection on a terminal strip. 1.5 The dehumidifier and all necessary accessories shall not exceed a height of 64 inches. 1.6 The length and width of the dehumidifier shall not exceed 7 feet by 8 feet. 1.7 Field connection of the utilities shall be the responsibility of the US Coast Guard. 1.8 The desiccant wheel shall contain no asbestos or ceramic paper substrates. 1.9 The desiccant wheel shall not contain loose desiccant in the wheel. 1.10 The dehumidifier shall have inlet and outlet reactivation and process air duct connections. 1.11 The dehumidifier shall include accessible filters for process and reactivation airflow. 1.12 The general construction shall be aluminum with removable panels for service inspection and maintenance. 2.0 PROCESS AIR SECTION 2.1 DEHUMIDIFIER 2.1.1 Air Flow Quantity: 750 SCFM 2.1.2 Design Entering Air Temperature: 60 °F dry bulb @ 73.2 grains per pound 2.1.3 Design Leaving Air Temperature: 113 °F dry bulb @ 22 grains per pound 2.2 PRE-COOLING COIL 2.2.1 Air Flow Quantity: 750 SCFM 2.2.2 Medium: Direct Expansion R-22 2.2.3 Design Entering Air Temperature: 91° F dry bulb/ 79 °F wet bulb @ 131 grains per pound 2.2.4 Design Leaving Air Temperature: 60° F dry bulb/ 59 °F wet bulb @ 73.2 grains per pound 2.2.5 Minimum Total Cooling: 56,500 BTUH 2.2.6 Maximum Coil Face Velocity: 400 feet per minute 2.3 PRE-COOLING REFRIGERATION SYSTEM 2.3.1 Condensing Unit Type: Air Cooled 2.3.2 Compressor Type: Scroll 2.3.3 Minimum Capacity: 58,000 BTUH 2.3.4 Condenser Inlet Air Temperature: 95° F dry bulb 2.3.5 Refrigerant Type: R-22 2.3.6 Capacity Control Type: Hot Gas Bypass 2.3.7 Minimum Ambient Operating Temperature: 20°F dry bulb 2.4 INLET FILTERS 2.4.1 Air Flow Quantity: 750 SCFM 2.4.2 Maximum Face Velocity: 500 feet per minute 2.4.3 Percent Efficiency: 30% per ASHRAE 52.1 2.4.4 Air Pressure Drop: Clean 0.3” static pressure/Dirty 1.0” static pressure 2.5 PROCESS AIR FAN 2.5.1 Air Flow Capacity: 750 SCFM 2.5.2 External Static Pressure: 3” water column 2.5.3 Type Wheel: SWSI 2.5.4 Fan Motor Enclosure: TEFC 2.5.5 Fan Motor Volts: 208-230 volts/3 phase/60 Hertz 3.0 REACTIVATION AIR SECTION 3.1 REACTIVATION AIR HEATER 3.1.1 Heating Medium: Electric 3.1.2 Capacity: 15.8 KW 3.1.3 Minimum Air Flow Quantity: 250 SCFM 3.1.4 Design Entering Air Temperature: 85 °F dry bulb 3.1.5 Design Leaving Air Temperature: 285 °F dry bulb 3.2 FILTERS 3.2.1 Air Flow Quantity: 250 CFM 3.2.2 Maximum Face Velocity: 500 feet per minute 3.2.3 Percent Efficiency: 30% per ASHRAE 52.1 3.2.4 Air Pressure Drop: Clean 0.3” static pressure/Dirty 1.0” static pressure 3.3 REACTIVATION AIR FAN 3.3.1 Air Flow Capacity: 250 SCFM 3.3.2 External Static Pressure: 0.75” water gauge 3.3.3 Type Wheel: SWSI 3.3.4 Fan Motor Enclosures: TEFC 3.3.5 Fan Motor Volts: 208-230 volts/3 phase/60 Hertz. 4.0 POST COOLING 4.1 POST-COOLING COIL 4.1.1 Air Flow Quantity: 750 SCFM 4.1.2 Medium: Direct Expansion R-22 4.1.3 Design Entering Air Temperature: 113° F dry bulb @ 22 grains per pound 4.1.4 Design Leaving Air Temperature: 71° F dry bulb @ 22 grains per pound 4.1.5 Minimum Total Cooling: 34,000 BTUH 4.1.6 Maximum Coil Face Velocity: 400 feet per minute 4.2 POST COOLING REFRIGERATION SYSTEM 4.2.1 Condensing Unit Type: Air Cooled 4.2.2 Compressor Type: Scroll 4.2.3 Minimum Capacity: 35,000 BTUH 4.2.4 Condenser Inlet Air Temperature: 95° F dry bulb 4.2.5 Refrigerant Type: R-22 4.2.6 Capacity Control Type: Hot Gas Bypass 4.2.7 Minimum Ambient Operating Temperature: 20°F dry bulb 5.0 DELIVERABLES 5.1 One onsite training at US Coast Guard Repair and Supply Center in Elizabeth City for no more then 10 employees. The instruction shall include set-up, operation and maintenance of the units. 5.2 The following shall be provided for each unit: Set-up/Installation Manual, Operation Manual, Maintenance Manual, and Electrical Wiring Schematic. 6.0 INPSECTION AND ACCEPTANCE On site by Aircraft Repair and Supply Center Personnel 7.0 QUALITY ASSURANCE PROVISIONS Provide information on Quality System such as ISO certification 8.0 DELIVERY Desired delivery is 12 weeks after the contractor receives notice of award. NOTE: THIS NOTICE WAS NOT POSTED TO WWW.FEDBIZOPPS.GOV ON THE DATE INDICATED IN THE NOTICE ITSELF (23-JUN-2005); HOWEVER, IT DID APPEAR IN THE FEDBIZOPPS FTP FEED ON THIS DATE. PLEASE CONTACT fbo.support@gsa.gov REGARDING THIS ISSUE.
- Web Link
-
Link to FedBizOpps document.
(http://www.eps.gov/spg/DHS-DR/USCG/USCGARSC/HSCG38-05-Q-500017/listing.html)
- Record
- SN00835820-F 20050625/050623221940 (fbodaily.com)
- Source
-
FedBizOpps.gov Link to This Notice
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