SOW.docx

Statement of Work (SOW) Project: Recirculating aquaculture system for catfish research

GENERAL INFORMATION

1.0 Scope of Work:

Five recirculating aquaculture systems will be used for catfish flavor research for the Department of Agriculture in New Orleans, LA. They will be placed in a Quonset hut that is not insulated and has no AC or heat. There will be 4 systems consisting of 3 tanks each holding 500 gallons (total 1500 gallons) recirculating at 25 gallons per minute. An additional holding tank of 1500 gallons with the same flow rate will also be included. We need to control the temperature of the 4 experimental systems.

The holding tank system will need to be kept above freezing for the rare (0 – 4 days/year) when the air temp goes below 0°C, but it doesn’t need to be controlled as accurately as the experimental systems.

About 10% of the water will be exchanged each day using dechlorinated city water.

2.0 Background:

We require 4 heat pumps for the research systems. Each will maintain water temperatures necessary for research (10 to 40°C) in air temperatures ranging from 15 to 40 °C. Five inline heaters will be required, one on the holding system to prevent freezing and one on each of the research systems to provide heat when the air is too cold for the heat pumps.

CONTRACTOR REQUIREMENTS

3.0 Technical Requirements/Tasks:

1. Four 5-hp air-cooled Heat Pumps, (220V, 1PH, 28A) to provide 47 kBtu/h of cooling power with Low Ambient Controls good down to 0°F.

a. Nominal BTU/KWH: 60K/17.5

b. Rating EER: 11.7

c. R-410A Freon Charge (lbs): 13.8

d. Volts/Phase: 208-230/1

e. Nominal Amps RLA/LRA: 27.7/134

f. MCA: 34

g. Max Fuse or CKT BRK Amps: 60

h. Air outlet (CFW): 4730

i. Water flow: 25 gallons per minute

j. The vendor should provide a warranty

2. Five 12kW inline heaters, (220V, 1PH, 55A)

a. Flow tubes: Pure Titanium

b. Contactor: Dual Schneider Electric contactors.

c. Control thermostat: 32 ~ 104°F Range. (1 - 33°F differential)

d. Safety thermal cutout: 130°F (manual reset)

e. Flow switch: W Gold tipped reed switch with Titanium fulcrum pin.

f. Wiring: High temperature, silicone sheathed, multi-strand copper conductors.

g. Seals: High temperature special formula EPDM.

h. Water connections: 1.5” NPS ABS unions.

i. Working pressure: 58 psi / 4 bar maximum.

j. Standards: European Electromagnetic Compatibility directive 89/336/EEC and 93/068/EEC

k. Compliance: EN 55014 – EN55104, EN 5501, EN 5502, CEI 801-4, CEI 801-2, CEI 801-3

l. Harmonised: The European Low Voltage Directive 72/23/EEC

m. Standards: The Harmonised Standard EN 60335-2-35

n. Water flow: 25 gallons per minute

o. The vendor should provide a warranty

4.0 Government Furnished:

The equipment will be installed in Quonset Hut,USDA-ARS-SRRC, New Orleans, LA. Access to the facility during normal business operations (Monday – Friday, 7:30 AM – 4:30 PM) is provided. Access during federal holidays is restricted.