9157

Apollo CM Block II Environmental Control Unit (ECU) Evaporator

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:2,000.00 - 4,000.00 USD
Apollo CM Block II Environmental Control Unit (ECU) Evaporator

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Auction Date:2015 Oct 22 @ 18:00 (UTC-05:00 : EST/CDT)
Location:236 Commercial St., Suite 100, Boston, Massachusetts, 02109, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
Apollo Command Module (Block II) Environmental Control Unit (ECU) Evaporator, measuring 13 x 8 x 6, stenciled on one side with part numbers, “812582-10 Assy. DWO 93922, SN 41.” In fine condition. One of two evaporators used to cool water-glycol mixture circulated within the Apollo Command Module. The glycol loop removed waste heat from astronaut space suits and supported temperature control of spacecraft atmosphere. Two of these evaporators, one for the primary and the other for the secondary coolant system, are made of special corrosion-resistant stainless steel plates and fin passages for the water-glycol arranged in a series of stacks alternated with sintered felt metal wicks, which were fed water through a plate with tiny holes. Evaporation cooled the plates which in turn cooled the water-glycol passing through, allowing the removal of excess heat at a rate of about 8,000 BTU per hour. A necessity for maintaining comfortable conditions for astronauts as they journeyed through space.