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FBO DAILY ISSUE OF MARCH 03, 2011 FBO #3386
MODIFICATION

49 -- Cooling Water Treatment Chemicals & Water Testing

Notice Date
3/1/2011
 
Notice Type
Modification/Amendment
 
NAICS
325998 — All Other Miscellaneous Chemical Product and Preparation Manufacturing
 
Contracting Office
Department of the Air Force, Air Force Materiel Command, Tinker OC-ALC - (Central Contracting), 3001 Staff Drive, Ste 1AG76A, Tinker AFB, Oklahoma, 73145-3015
 
ZIP Code
73145-3015
 
Solicitation Number
FA8125-11-Q-0034
 
Archive Date
4/5/2011
 
Point of Contact
Matthew R. Dittmer, Phone: 4057395197
 
E-Mail Address
matthew.dittmer@tinker.af.mil
(matthew.dittmer@tinker.af.mil)
 
Small Business Set-Aside
Total Small Business
 
Description
Three questions asked. Answers provided. For questions 1 & 2: 1. What is the bolted tonnage and/or GPM circulation rates for each cooling tower? 2. What is the estimated volume of each closed chill loop? Appendix A-1 and Appendix A-2 No 1 (both Appendices) Note: As stated in the appendices, this system was "separated" into two documents (on paper only) for budgetary reasons; in actuality, this is a single system, and supports the single function of providing cooling water to air compressors; historical/estimated chemical usage for this system is the total amount shown in both appendices. This system consists of a three (3) cell Cooling Tower OC11516, OC11517, and OC11518, manufactured by Marley (Quadraflow M/N: 23203 and S/N: 085290), and were purchased/installed circa 1995. Per manufacturer's literature, the cooling tower system is rated for 2000 tons nominal. All 3 cells share a common basin, located adjacently, consisting of an in-ground concrete enclosure which holds approximately 15,000 gallons water. Each cell possesses a two-speed up-flow fan, each of which cycles off-low-high based on demand. Water flows continuously through all three (3) tower cells. This open loop system operates as follows: water is pumped from the basin, runs to the air compressors (heat load), runs to the cooling towers, and returns back to the common basin. There are 4 motorpumps continuously flowing water through the towers (and air compressors) for a maximum approximate total flow of 4,000 GPM. The (roughly) estimated total cooling water volume for this open loop system is circa 20,000 gallons. Appendix A-3 No 1, No 2, and No 3 This system consists of two (2) each identical Fluid Coolers (a.k.a. Closed Circuit Cooling Towers) OC17692 and OC16520, both manufactured by Baltimore Air Coil (M/N: FXV-364-31R, S/N's: U053394501 and U053394503), and were purchased/installed circa 1995. Per manufacturer's literature, each fluid cooler is rated for 579 tons nominal. Each fluid cooler possesses an independent basin (integral to each fluid cooler) for spraybar water; each cooler's basin holds/maintains approximately 2700 gallons of water. Note that each fluid cooler possesses two (2) coils and two (2) spraybar motorpumps (one spraybar motorpump per coil), with a single VFD controlled up-flow fan. The fluid coolers are operated in a lead/lag configuration, alternated weekly. The fluid coolers, spraybar motorpumps, and VFD fan come on and offline per demand. Except for a few weeks during the summer months, one fluid cooler can typically handle the entire cooling load. The closed loop portion of this system operates as follows: water from a "hot" reservoir tank is pumped to each fluid cooler (one motorpump per fluid cooler), runs through the fluid cooler coils, and returns to a "cold" reservoir tank. Then the water from the "cold" reservoir tank is pumped (using a separate set of motorpumps) to the vacuum furnaces (heat load), and is then returned back to the "hot" reservoir tank. The motorpump to the vacuum furnaces continuously flows approximately 2500 GPM. The motorpump to each fluid cooler flows approximately 1400 GPM, so with both fluid coolers in use, the flow through both fluid coolers is approximately 2800 GPM total. The (roughly) estimated total cooling water volume for this closed loop system is circa 20,000 gallons. No 4 and No 5 This system consists of one (1) each Fluid Cooler OC13887, manufactured by Recold (M/N: JWH-115C, S/N: 991006), and was purchased/installed circa 2000. Per the manufacturer and literature, the fluid cooler is rated for 175 tons nominal. The fluid cooler possesses a basin (integral to the fluid cooler unit) for spraybar water; the basin holds/maintains approximately 880 gallons of water. This fluid cooler uses a single spraybar motorpump and single cross-flow fan. The fluid cooler spraybar motorpump and fan come on and offline per demand. The closed loop portion of this system operates as follows: water/glycol solution (30% glycol) from the reservoir tank is pumped to the fluid cooler, runs through the fluid cooler coil, then runs to the vacuum furnaces (heat load), and returns back to the same tank. The motorpumps to the fluid cooler (and furnaces) continuously flows approximately 1000 GPM. The total glycol/water solution volume is estimated at 4,500 gallons. No 6 This small, closed loop system does not utilize a fluid cooler or cooling tower, but obtains its cooling action from a shell and tube heat exchanger tied-in to the Base Supplied chilled water loop. The system was manufactured from both new and used components, and was installed circa 2003. This system operates as follows: water from the reservoir tank is pumped through the tube side heat exchanger (chilled water on the shell side), and is returned back to the tank. Then separate motorpump(s) pull water from the same reservoir tank, runs to the Polycolds (heat load), and is returned back to the tank. The motorpump to the Polycolds continuously flows between 50 - 100 GPM. The cooling water flow through the (tube side) of the heat exchanger is a maximum 120 GPM; the chilled water flow through the (shell side) of the heat exchanger is a maximum 50 GPM. The total cooling water system fluid volume is circa 1000 gallons. For Question #3: 3. Do Tinker AFB personnel desire testing equipment for their own use? We do little in-house testing of these systems...basically none on any of the B3001 systems (all in appendix A-3). However, several of the mechanics do perform periodic testing on the system located by Buildings 200/210 (appendix A-1 and A-2)..this is the cooling water for the air compressors. However, these are relatively small field test kits, and we just buy them...historically, we've purchased them as-needed from the contract provider. In other words, when we need to replenish our supply of test kits, we purchase them, and the contract provider is NOT expected to pay for or provide them to us as part of this service contract. On the relatively rare occasion we'd need/want more in-depth information on any of the fluids, we have laboratories here in B3001 that possesses everything needed.
 
Web Link
FBO.gov Permalink
(https://www.fbo.gov/spg/USAF/AFMC/OCALCCC/FA8125-11-Q-0034/listing.html)
 
Place of Performance
Address: Tinker Air Force Base, Oklahoma City, Oklahoma, 73145, United States
Zip Code: 73145
 
Record
SN02390332-W 20110303/110301234738-17eb89c557df7fc6b8c42375b64dfcf3 (fbodaily.com)
 
Source
FedBizOpps Link to This Notice
(may not be valid after Archive Date)

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