Winter, J., Zell, M., Hummelsberger, B., Cassese, F. et al., "The Refrigerator/Freezer Rack for the International Space Station," SAE Technical Paper 1999-01-1943, 1999, doi:10.4271/1999-01-1943.
Currently a Refrigerator Freezer Rack (RFR) is developped by DaimlerChrysler Aerospace. The Refrigerator/Freezer System consisting of a pool of 10 flight racks in total, with a 3 racks complement always on-orbit, will provide the necessary conditioned volume for the crew''s frozen and refrigerated food as well as for other cargo items requiring conditioned stowage. The MPLM will be utilized for up- and download logistics. Either the racks or only the cargo will be swapped from the MPLM to the ISS and back again. In the following, the preliminary RFR design concept as a result of a Phase A study will be presented.