Cryogenic energy system for cooling and powering an indoor environment

A cryogenic energy system for cooling and powering an indoor environment, the system comprising:

• a cryogenic open loop comprising a cryogen source to supply a cryogen and at least one transfer-expansion stage in fluid connection with the cryogen source, each transfer-expansion stage comprising at least one heat exchanger for heat transfer therein from a hot fluid to the cryogen and a power unit for expansion therein of the cryogen that has been heated in the at least one heat exchanger to generate electricity, the at least one heat exchanger including an evaporator;
• and
• a heat supply open loop configured to provide the hot fluid for heat exchange with the cryogen in the at least one heat exchanger, the heat supply open loop comprising an exit for the hot fluid that has been cooled by the cryogen in the at least one heat exchanger;
• the cryogenic energy system configured to perform heat removal from a first heat transfer loop of a conventional cooling system of the indoor environment for at least partially cooling the indoor environment, the first heat transfer loop transferring heat obtained from air in the indoor environment, wherein the heat removal comprises one of:
• heat transfer from the first heat transfer loop to the cryogen in the evaporator, and;
• heat transfer from the first heat transfer loop to the hot fluid in the heat supply open loop that has been cooled by the cryogen in the evaporator.