MODIFICATION
61 -- Solar-Photovoltaic Power Supply
- Notice Date
- 10/14/2009
- Notice Type
- Modification/Amendment
- NAICS
- 334416
— Electronic Coil, Transformer, and Other Inductor Manufacturing
- Contracting Office
- RDECOM Acquisition Center - Natick, ATTN: AMSRD-ACC-N, Natick Contracting Division (R and BaseOPS), Building 1, Kansas Street, Natick, MA 01760-5011
- ZIP Code
- 01760-5011
- Solicitation Number
- W911QY-10-T-0001
- Response Due
- 10/19/2009
- Archive Date
- 12/18/2009
- Point of Contact
- Jonathan Lehmann, 508-233-4124
- E-Mail Address
-
RDECOM Acquisition Center - Natick
(jonathan.lehmann@us.army.mil)
- Small Business Set-Aside
- Total Small Business
- Description
- Solicitation W911QY-10-T-0001: More Questions and Answers Q) Does the existing refrigeration system include a back-up diesel generator? A) Yes. But not all refrigeration systems we might use this array with will include backup power. Think of the array as a general purpose tool for us to use to test known and unknown equipment. Q) If so, is it desired that our solar power system be capable of interfacing with that system (e.g., use that generator as an automatic back-up to our system, etc.)? A) Yes, to an extent; your balance of system might need equipment to protect itself from surges, but the system being solicited is not responsible for switching between power supplies, or automatically controlling other power supplies. It need only output. We are assuming that electronics necessary to adapt to power sources will be aboard the system, but at the same time expecting that the BOS will offer a variety of common AC and DC outputs at common voltages. Q) If so, what is the size, manufacturer and model number of the existing generator? A) Because this system will be used on multiple projects, specifics on any backup generator cannot be supplied. Q) If not, is it desired that our solar power system include a back-up diesel generator (e.g., to protect against prolonged periods of poor weather, etc.)? A) No, that would make it too expensive, and it is impossible to anticipate the needs of future applications. Q) What system installation/testing location should we assume for system design purposes (e.g., to determine available sun hours per day to size the array, etc.)? A) The power output of the SPPS shall be no less than 2.75 kW at 1000 W/m2 in a 25C environment. If you design for this, the location is irrelevant. Q) What are the technical specifications (manufacturer, model number, spec sheet, drawing and website for further information) for the output plug of the refrigeration unit? A) The system solicited should include an electrical enclosure providing power conversion and conditioning equipment -- i.e., the balance of system -- that renders the DC output of the array useable to typical military and civilian electrically-powered equipment. It would be best if the BOS electrical enclosure include multiple outlets and key in on what is typical to the civilian world. It can be said that the first application has as its input connector a PowerModHP Dual Pole male - Series A. Q) What are the technical specifications (manufacturer, model number, spec sheet, drawing and website for further information) for the refrigeration system? A) Because this system will be used on multiple projects, specifics to the first application are expected to be irrelevant. Q) Specifically, what is the power requirement for the refrigeration unit? Voltage? Amperage draw? Frequency? Phase (split of three-phase)? A) The nominal and maximum open circuit voltage of the SPPS shall be in the range 48-72 volts DC output to the balance of system. This voltage shall not fall below 29 volts while the array experiences at least 100 W/m2 of incident sunlight. These specifications will dictate was must and can be provided out of the electrical enclosure with common civilian outputs. Q) Please confirm that we should assume a system configuration similar to our SkyStation (ISO container -based power system)? A) The storage/shipping container is not the responsibility of the offeror. Q) If an ISO container is not desired, there are other shelter construction options available, such as lightweight metal, concrete and panelized. If one of these alternatives is desired, please let us know. A) The expectation is that this system is mobile, traveling with the movements of, for example, a Forward Operating Base, and suffering the harsh conditions of military life. Also note that certain content of the proposal seems to imply we expect something that when transported is relatively compact and lightweight. You may propose anything you wish, but keep in mind that you are competing with what other offerors may propose as they make their own interpretations. Q) Is there a preference for how the structure rests on the ground? How much prior sitework (clearing/ leveling) would we be able to rely on prior to placement of the system? Would a system that did not penetrate the ground be preferred? A) Assume that the roughest ground the system will be set up on will be an open field. It does not matter if the system structure penetrates the ground, for instance requiring stakes. Q) Is there any minimum/maximum range of height /clearance for the system to meet? To what potential purpose would the space under the system be used? A) It is likely the refrigerated container the system powers will be placed under and shaded by the shelter. Refrigerated ISO containers used by the U.S. military are typically 8 feet tall. It is expected the shelter cannot be too high if it is capable of easy set up by soldiers and is sturdy enough to survive high winds. Note the solicitation states that lower weight is of high value and lower transport cube is of high value. This may effect deployed size. Q) What is the delivery date and location required for this solicitation? A) The delivery location will either be Natick, MA, or a Florida location, depending on how long this solicitation takes and how long construction takes. Q) Is there a DD 1423 or other CDRL information available that I have not located on the FBO.GOV site for this solicitation? A) No, there is not a DD1423 or other CDRL information available. Q) Can or should this system be designed to mount to an existing container/trailer system? A) No Because the military's methods for shipping materiel into theatres involves ISO containers, and there are requirements that the ISO containers must retain their ISO rating in both structure and method, we have shied away from mounting vulnerable equipment to exterior surfaces. Furthermore, because even 3 kW is insufficient to power most (but not all) systems, serving only to offset and not completely eliminate fuel use and generator hours (still a worthwhile goal) we don't feel a pressing need to integrate solar arrays with specific assets, anticipating instead that they are more functional/usable if they remain independent and therefore fungible. Lastly, because we are anticipating testing with future refrigeration systems that have unknown specific characteristics, and we wish the cost of the system to go toward meeting the requirements described in the solicitation, there is no need to design for mounting to an existing asset.
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/USA/USAMC/DAAD16/W911QY-10-T-0001/listing.html)
- Place of Performance
- Address: RDECOM Acquisition Center - Natick ATTN: AMSRD-ACC-N, Natick Contracting Division (R and BaseOPS), Building 1, Kansas Street Natick MA
- Zip Code: 01760-5011
- Zip Code: 01760-5011
- Record
- SN01985138-W 20091016/091014234823-9f46ea171fc837d048d918f44a7fc12a (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
(may not be valid after Archive Date)
| FSG Index | This Issue's Index | Today's FBO Daily Index Page |