NASA/Goddard Space Flight Center, Code 219, Greenbelt, MD 20771

18 -- LOOP HEAT PIPE SYSTEMS FOR GLAS SATELLITE-BASED INSTRUMENT SOL RFP5-13999 DUE 061899 POC Cosimo Lucchese, Contract Specialist, Phone (301)614-5584, Fax (301)614-5619, Email clucches@pop200.gsfc.nasa.gov -- Mary Petkoff, Contracting Officer, Phone (301)614-5587, Fax (301)614-5619, Email Mary.J.Petkoff.1@gsfc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/GSFC/date.html#RFP5-13999. E-MAIL: Cosimo Lucchese, clucches@pop200.gsfc.nasa.gov. NASA's Goddard Space Flight Center (GSFC) plans to acquire Flight Loop Heat Pipe Systems for use on the Geoscience Laser Altimetry System (GLAS). The GLAS instrument requires two (2) custom flight-qualified Loop Heat Pipe (LHP) systems. Each LHP system includes an LHP evaporator and Optical Solar Reflectors-covered honeycomb panel with an LHP embedded condenser. The GLAS LHP systems maintain steady electronic component temperatures (a thermal system requirement) within the GLAS instrument by varying the thermal conductance from the source of heat (the components) to the sink of heat (deep space). The components are directly linked to the LHP System via a network of axial grooved aluminum-ammonia heat pipes. The temperature drop from the components to the radiating surface is minimized by using the latent heat of the working fluid propylene; this minimizes the size and weight of the radiating surface. Propylene fluid boils at the heat source and condenses at the heat sink and is circulated by passive means. The LHP systems will require engineering and design in conjunction with GSFC. Vendor testing will be required to acceptance level for all space-qualified processes. Deliverables include: a destructive-test unit, two (2) LHP systems, transport and test Ground Support Equipment (GSE), and engineering support at GSFC for testing. This action is planned on a sole-source basis in accordance with FAR 6.302-1; "Only One Responsible Source". NASA/GSFC intends to obtain these items from Dynatherm Corporation, Inc., 1 Beaver Court, Hunt Valley, MD 21030. Dynatherm has designed and is manufacturing and testing prototype units of the LHP. Through this experience Dynatherm has acquired the experience and expertise to fabricate the flight models within the strict time constraints required by the GLAS launch schedule. Award to any other source for the LHP would require that source to replicate much of the developmental work already accomplished by Dynatherm, and could jeopardize the launch schedule of the GLAS instrument and cause significant disruption to the Code 500 mission. See CBD numbered Notes 22 and 26. An Ombudsman has been appointed, see NASA Note B. Referenced notes can be viewed at the following URLs: http://genesis.gsfc.nasa.gov/nasanote.htm or http://cbdnet.access.gpo.gov/num-note.html. Interested firms have fifteen (15) days from the publication of this synopsis to submit in writing to the identified point of contact, their qualifications/capabilities. Such qualifications/capabilities will be used solely for the purpose of determining whether or not to conduct this procurement on a competitive basis. Responses received after the fifteen (15) days or without the required information will be considered nonresponsive to the synopsis and will not be considered. A determination by the Government to not compete this proposed effort on a full and open competitive basis, based upon responses to this notice is solely within the discretion of the Government. All qualified responsible sources may submit an offer, whichshall be considered by the agency. Posted 06/02/99 (D-SN338205). (0153)

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