Passive cooling system

Patent · Tue Dec 22 04:00:00 EST 1981

OSTI ID:5714022

Christopher, N S

A cold bank tank in an enclosure for storing thermal energy in a very small area contains a liquid heat transfer fluid and has a top which is the top of the enclosure and a spaced opposite bottom. An inside heat exchanger extends from the bottom of the tank in the enclosure for cooling warm air in the enclosure rising by natural convection, returning the cooled air to the enclosure and transferring the warm air to the tank wherein it warms the fluid in the tank. An outside heat exchanger outside the enclosure is spaced from the top of the enclosure and coupled to the tank. A plurality of energy storage rods in the fluid in the tank store thermal energy in a very small area. The heat warming the fluid is transferred to the energy storage rods and when the outside temperature decreases below a predetermined magnitude, heat is released from the rods to the liquid fluid and vaporizes the fluid. The vaporized fluid flows upward through piping to the outside horizontal heat exchanger, through the outside heat exchanger, whence its heat is dissipated in the cooler outside air, and the vapor is recondensed and returns by gravity force to the tank via piping thereby storing cold energy in the rods for release when the air in the enclosure is next warmed.

• Assignee: IFI; EDB-82-077365
• Patent Number(s): US 4306613
• OSTI ID: 5714022
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250600* -- Energy Storage-- Thermal
CONTAINERS
COOLING SYSTEMS
DESIGN
ENERGY SYSTEMS
ENTHALPY
EQUIPMENT
FLUIDS
FREONS
HALOGENATED ALIPHATIC HYDROCARBONS
HEAT EXCHANGERS
HEAT PIPES
HEAT TRANSFER FLUIDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PASSIVITY
PHYSICAL PROPERTIES
TANKS
THERMAL ENERGY STORAGE EQUIPMENT
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
VAPORIZATION HEAT