Attachment_0006___Solicitation_Questions_and_Answers_2.docx

Industry Questions Industrial High Temperature Heater System

W15QKN-25-Q-A025

Date: 12/24/2024

1. What is the ambient temperature?

Answer: 50-70 Fahrenheit (Room Temp). This was in Section 2 of the PWS.

2. What is the target / process temperature?

Answer: The air needs to be heated to upwards of 800F to avoid liquification of the air when the system runs. This was in Section 2 of the PWS.

3. What is the heat up time (assuming we will be re-circulating the air, if it is a “one-pass” heating requirement, what is the SCFM)?

Answer: The tunnel needs to be heated so it does not explode from thermal shock. The system is one pass. The SCFM is ~ 2200. Clarification: Heat will not be re-circulating. This was in Section 2 of the PWS.

Date: 1/2/2025

4. We can do this type of the heater but please provide the value of volume flow at these conditions, or simply advise the power you need for both options:

· 800F, 1.8kg/s

· 500F, 3.5kg.

Answer: See Section 2.

Date: 1/3/2025

5. We will of course need additional information on specifications to be able to quote . However, we are currently finalizing our infrastructure, and will not have capability until the end of this month. Could you provide an extension of the solicitation?

Answer: The specifications are in the PWS. The Solicitation will be extended by 45 days.

Date: 1/7/2025

6. There seem to be two flow rate conditions, please confirm this.

Answer: Yes… Two mass-flow rates; 1.8 kilograms and 3.5 kilograms per second. This information Section 2 of the PWS.

7. For each condition we need the following:

· Flow rate (mass flow rate is best, which they have done)

· Operating pressure

· Any other details they can provide about the air.

· Inlet temperature with units

· Outlet temperature with units

· How do you want to mount the heater?

· What are the pipe sizes we are working with?

· Is the system one pass or recirculating?

· We need an explanation of what you mean by preheating process? This may tie into the question above.

Answer: This information is all in the PWS except for the piping and heating questions. The pipe size is going to be around 6 inches.

8. For the control panel:

· Do we need any communications for remote control of the system or data acquisition in the control panel?

· Do we need to control a fan motor or compressor?

· I assume we will need to interlock with a fan or compressor, please confirm.

Answer: A remote control required. For the fan motor and compressor question, there is no control needed. However, there should be an interlock if the gate or control valve is not open and air is not running. There is no fan or compressor, only stored compressed air.

Date: 1/8/2025

9. Please confirm on the design of the system that the incoming air will be 50-70 degrees F or degrees C.

Answer: Already answered. It is ROOM TEMPERATURE. See the SOW.

10. And then we have two conditions. To heat 1.8 kilograms per second of air at 350 psig from 50 to 800 degrees F or degrees C?

Answer: The units were given. 800 degrees Fahrenheit. This is in Section 2 of the PWS.

11. To heat 3.5 kilograms per second of air at 350 psig from 50 to 500 degrees F or degrees C?

Answer: Fahrenheit.

12. What is the maximum pressure drop allowed across the heater?

Answer: Minimal Pressure Drop as possible is desired.

13. What is the maximum length that the heater can be?

Answer: 12ft L by 6 W.

Date: 1/9/2025

14. Are the units correct in the data sheets? At 800KG/s at 350PSIG from 50F – 70F would require 5MW of power.

Answer: These units are not correct. 800kg/s is not mentioned anywhere in the SOW. 800F, 1.8kg/s. 350 PSI Room Temp.

15. Is mass flow rate correct?

Questionnaires:

Answer: Yes.

16. A question was raised on a questionnaire by a contractor if the requirement was for a ‘single pass’ or ‘recirculating’ Answer: Single Plass.

17. A question was raised on a questionnaire by a contractor as to the ‘area classification’ Answer: Area is considered safe and non hazardous.

18. A contractor asked about what material is to be heated.

Answer: Compressed Air

19. A contractor asked about whether or not the material heated sensitive to heat. We do not expect a phase change in air.

Answer: Yes.

20. A contractor asked about whether or not the heater would be performing indoors.

Answer: Yes.

21. A contractor asked about an ASME Code Stamp is required Answer: No.

22. A contractor asked if PED Compliance is required.

Answer: No.

23. A contractor asked about corrosion allowance.

Answer: Corrision cannot happen for 20 years.

24. A contractor asked about the inlet outlet size Answer: 6 inches.

25. A contractor asked about the flange rating in pounds Answer: 350 PSI or greater.

26. A contractor asked about fluid properties Answer: At a temperature of 350 PSI and 800 degrees Fahrenheit the density 0.125 pounds.

27. A contractor asked about specific heat Answer: Approximately 0.24 BTUs per pound of degree Fahrenheit.

28. A contractor asked about thermal conductivity Answer: It is air. 0.0299 watts per milli kelvin.

29. A contractor asked about viscosity Answer: It is air. Viscosity changes-based pressure.

30. A contractor asked about the KW rating or heat duty Answer: The requirement is AC power and 480 volts.

31. A contractor asked about the maximum watt density on heater element.

Answer: What the contractor proposed. Need to meet the performance work statement.

32. A contractor asked about what the heater material.

Answer: The contractor needs to meet the Performance Work Statement. The kind of material proposed will be considered in the tradeoff competition.

Answer: What the contractor proposed. Need to meet the performance work statement.

33. A contractor asked about NEMA Type.

Answer: NEMA 4.

34. A contractor asked about the Heater Orientation.

Answer: Horizontal Orientation is preferred but not required. The maximum size of the heater shall be 12L x 6W or smaller.

35. A contractor asked about ON/OFF.

Answer: Only on off states are required. Multi stages are not required.

36. A contractor asked about Control Mounting Options.

Answer: Remote Control Panel and Heater switch on safety required.

37. A contractor asked about the NEMA for the control panel.

38. Answer; NEMA 4.

39. A contractor asked about the area around the control panel related to whether or not it is hazardous.

40. Answer: NEMA 4.

41. A contractor asked about purging.

Answer: Not applicable. Non Hazardous.

42. A contractor asked about the temperawte code/class Answer: Not applicable. Non Hazardous.

43. A contractor asked about process thermocouple and sheath thermocouple.

Answers: The lifespan of both relative to the proposed cost shall be considered during tradeoff competition.

44. Confirm the bid date and time listed above are unchanged.

Answer: See beta. Sam for updates.

45. Construction cost estimate or a construction cost range for the project.

Answer: Not applicable. This is for delivery of a heater system not for construction.

46. Plan holder’s list/bidders list.

Answer: There is no list.

47. When is the best time to follow up for bid results?

Answer: Wait for the KO to communicate with you.

Date: 2/20/2025

48. Could you confirm the following details?

Flow Rate:

Temperature In:

Temperature Out:

Flow Rate: A) 1.8 kg/s (to 800°F) and B) 3.5 kg/s (to 500°F) Response: Confirmed Does this indicate a maximum flow rate of 3.5 kg/s and a minimum of 1.8 kg/s?

Response: The maximum should be 3.5 kg/s. The minimum will be zero Temperature:

Does this mean 500 deg inlet temperature and 800 deg outlet temperature?

Response: There are two different settings for the outlet.

For inlet temperature, ie. ambient outdoor, depends on weather.

Power:

What voltage will be used to power the heater(s)?

Response: The requirement is AC power and 480 volts.