Abstract: A heat exchanger for both sensible and latent energy, enthalpy, has walls or plates that extend between two air streams that also permit and assist recirculation and filtration. The walls between air streams consist of a substrate with a coating on the substrate. The coating, in combination with the substrate material original porosity, is used to control final porosity and hydrophilic/oleophilic characteristics. By control of the pore size and surface material characteristics, there can be almost a total recirculation, a recirculation of only gases (filtering out solid particles), a transfer of only moisture and heat, or a transfer of only heat. The pore size and characteristics of the coating along the path of the air streams can be varied so that different types of exchange can be obtained along the path of the air streams.

Abstract: Actuators already present as an integral part of the control systems of missiles and the like are used to activate and control the deployment of fins and the like without the need for separate explosively or mechanically driven fin deployment systems. Springs located in hinges on the fins accomplish the complete deployment of the fins after proper orientation by the actuators.

Abstract: Closed loop cooling is provided by means of a mechanical air conditioner combined with an air-to-air heat exchanger. Three basic modes of operation maximize cooling while minimizing energy consumption, depending on ambient air temperature. In the first mode the air-to-air heat exchanger or economizer provides all required cooling to a closed circuit enclosure air stream, transferring heat to the cold ambient air stream. In the second mode the air-to-air heat exchanger precools the closed air circuit stream using moderate temperature ambient air, in the same manner as in the first mode, followed by further removal of heat by passing enclosure air through refrigeration condenser coils. The heat taken in at the evaporator is transferred to the ambient air stream as it passes through a condenser coil after passing through the heat exchanger.

Abstract: Closed loop cooling is provided by means of a mechanical air conditioner combined with an air-to-air heat exchanger. Three basic modes of operation maximize cooling while minimizing energy consumption, depending on ambient air temperature. In the first mode the air-to-air heat exchanger or economizer provides all required cooling to a closed circuit enclosure air stream, transferring heat to the cold ambient air stream. In the second mode the air-to-air heat exchanger precools the closed air circuit stream using moderate temperature ambient air, in the same manner as in the first mode, followed by further removal of heat by passing enclosure air through refrigeration condenser coils. The heat taken in at the evaporator is transferred to the ambient air stream as it passes through a condenser coil after passing through the heat exchanger.