The liquid galley refrigeration system for cooling food carts for aircraft
employs an intermediate working fluid to transfer heat from one or more
food carts to one or more remote chillers, allowing the carts and
chillers to be advantageously distributed in the aircraft. A plurality of
heat exchanges effect a cooling of the carts wherein heat from the food
cart is first transferred to a first airflow; heat from the first airflow
is then transferred to an intermediate working fluid that is circulated
between a location immediately adjacent the food carts and a remote
chiller; heat from the intermediate working fluid is subsequently
transferred to the chiller working fluid; and finally, heat from the
chiller working fluid is expelled. While the chiller working fluid
undergoes a phase change in order to transfer heat from the intermediate
working fluid to the cooling air, the intermediate working fluid remains
in its liquid phase throughout its circulation. A recirculation pump
circulates the intermediate working fluid through a distribution system
that may link a plurality of chillers to a plurality of food carts, and
the temperature of the food carts is regulated by a combination of
controls.