SPACE PROCESSING APPLICATIONS PAYLOAD EQUIPMENT STUDY VOL.Ⅱ D. SPA SUPPLEMENTAL POWER AND HEAT REJECTION KIT

摘要

Since both the power availability and heat-rejection/thermal control capability of the Spacelab were found to be insufficient to fulfill the experiment requirements of the Space Processing discipline, 1t was decided to utilize a supplementary power and heat rejection kit (PHRK). This kit will be supplied by the SPA payload and will be used in conjunction either with manned experiments in the Spacelab's experiment module, with unmanned experiments in the Spacelab's cargo bay, or with a combination of these. The PHRK will be located in the cargo bay for all three of these mission modes.nThe two subsystems of electric power and thermal control were analyzed in order to define the requirements for the SPA PHRK.nAs a basis for the analyses, twelve exemplary experiments were de¬fined and power timelines were developed. From these timelines, the experiment requirements for sustained power, peak power and energy were determined. The power and energy requirements at the power source were extrapolated by using these raw figures and estimations of line losses, efficiencies and contingency factors.