SLAC National Accelerator Laboratory is operated by Stanford University for the Department of Energy. As a management and operating contractor, subcontracts awarded by the Laboratory are not Federal procurements, and are not directly subject to the Federal Acquisition Regulations in 48 CFR. Nonetheless, certain Federal laws, Executive Orders, and regulations may affect our DOE approved purchasing system, as required by statute, regulation, or contract terms and conditions.
AMENDMENT 01
HI,
The following Addendum is being issued for the subject Request for Quotation: 349035 R1 WaterCooled Condensing Unit
Answers to Questions:
A. confirm the required condensing temperature on the CO₂ side of the heat exchanger. Could you provide this information to ensure alignment with the system requirements?
Answer: The CO2 side of the heat exchanger should be between -35 C to 5 C.
This Addendum modifies the Request for Quotation and must be acknowledged. Failure to acknowledge all addenda could make your proposal non-responsive. Please confirm that the submitted proposal is not changed because of this addendum. If proposal sent is revised because of this, please submit the revised proposal.
The following changes are hereby made to the appropriate documents contained the above-mentioned Request for Quotation (RFQ). All other terms and conditions of the RFQ remain the same.
Thank you very much.
Katherine Jill A. Coh
SCM Commodities Team Lead
SLAC National Accelerator Laboratory
2575 Sand Hill Road
Menlo Park, CA 94025
Tel: 650-926-2770
Email: kcoh@slac.stanford.edu
Water cooled condensing unit = Qty 1
Specifications:
SLAC is in the process of building a cooling plant for research and needs a refrigeration condensing unit based on a vapor compression cycle, using refrigerants with the ASHRAE refrigeration classification of A1 (low toxicity and nonflammability) and not listed at the Section 95374 - List of Prohibited Substances in CA. As example, R448A is an acceptable refrigerant.
When at full capacity, the condensing unit shall give a cooling capacity of minimum 4000 W with evaporator temperature at -40oC.
The condenser of the refrigeration circuit shall be cooled by water with an inlet temperature at 17oC (63 F).
The system shall equip with an R448a evaporator made by a compact brazed plate heat exchanger that condenses gas carbon dioxide running in counterflow. The MAWP shall be 80 bar. Example SWEP B18 with 34 plates, or similar.
The refrigeration condensing unit shall use an expansion valve with adjustable cooling temperature between -40oC and +10oC. The use of cylinder unloader and/or VFD to adjust the cooling capacity is preferred.
The system weight shall be less than 1200 lbs.
The power supply of the condensing unit shall be 460v/3ph/60hz.
The dimension of the unit shall be not larger than 48”x45”x62”
Technical evaluation criteria:
- Dimensions not larger than 48”x45”x62”
- Refrigeration Capacity not less than 4kW at -40oC
- Adjustable Evaporation temperature -40 oC,+10 oC
- Water cool condenser, inlet 63oF
- Vapor compression cycle, no intermediate fluid
- High Pressure rated (MAWP 80bar) CO2 condenser
- Weight of the unit less than 1200 lbs
Water cooled condensing unit = Qty 1
Specifications:
SLAC is in the process of building a cooling plant for research and needs a refrigeration condensing unit based on a vapor compression cycle, using refrigerants with the ASHRAE refrigeration classification of A1 (low toxicity and nonflammability) and not listed at the Section 95374 - List of Prohibited Substances in CA. As example, R448A is an acceptable refrigerant.
When at full capacity, the condensing unit shall give a cooling capacity of minimum 4000 W with evaporator temperature at -40oC.
The condenser of the refrigeration circuit shall be cooled by water with an inlet temperature at 17oC (63 F).
The system shall equip with an R448a evaporator made by a compact brazed plate heat exchanger that condenses gas carbon dioxide running in counterflow. The MAWP shall be 80 bar. Example SWEP B18 with 34 plates, or similar.
The refrigeration condensing unit shall use an expansion valve with adjustable cooling temperature between -40oC and +10oC. The use of cylinder unloader and/or VFD to adjust the cooling capacity is preferred.
The system weight shall be less than 1200 lbs.
The power supply of the condensing unit shall be 460v/3ph/60hz.
The dimension of the unit shall be not larger than 48”x45”x62”
Technical evaluation criteria:
- Dimensions not larger than 48”x45”x62”
- Refrigeration Capacity not less than 4kW at -40oC
- Adjustable Evaporation temperature -40 oC,+10 oC
- Water cool condenser, inlet 63oF
- Vapor compression cycle, no intermediate fluid
- High Pressure rated (MAWP 80bar) CO2 condenser
- Weight of the unit less than 1200 lbs
Source selection will be based on Lowest Priced Technically Acceptable Method.
Please provide a price and lead time quotation by COB November 19, 2024.
Send quote to kcoh@SLAC.stanford.edu.
Please be advised that the requirement was also posted in SAM.gov.
Is there any room for additional discount such as for Academic, ICPT, GSA, or Government Institutions?
Buy American Act Certification (BAA) applies to awards over $10,000.
Representations & Certifications Rider is required. Once completed the Reps and Certs is valid for one year until renewal. If you have already completed one within the year please disregard. Otherwise, please complete and return.
All subcontractors are required to register in the System for Award Management (www.sam.gov).
If possible, please provide a link to your webpage for published price list to substantiate for the prices quoted.
The resulting purchase order will be issued on a fixed price basis. SLAC National Accelerator Laboratory Terms and Conditions for Fixed Price Commercial Supplies and Services (Rev. August 2023) will be made a part of the resulting order. Please mark up terms and conditions if you wish to negotiate. No mark ups mean that you accept SLAC Terms and Conditions.
Payment Terms will be NET-30
Freight terms will be FOB Destination Prepaid and Add
You are requested to mark and identify proprietary/confidential information provided in response to the solicitation.
Contact me directly with any questions.
Sincerely,
Katherine Jill A. Coh
Procurement Commodities Team Lead
SLAC National Accelerator Laboratory
2575 Sand Hill Road
Menlo Park, CA 94025
Phone: 650-926-2770
Email: kcoh@slac.stanford.edu
