Accession Number : ADD014601

Title :   Apparatus for Cooling Electronic Components in Aircraft.

Descriptive Note : Patent, Filed 25 Jan 89, patented 19 Jun 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Altoz, Frank E ; McClure, John D

Report Date : 19 Jun 1990

Pagination or Media Count : 1

Abstract : A ram air cooling system for cooling electronic components in an aircraft provides automatic switching from a high ram air speed cooling mode (ACM) to a low ram air speed cooling mode (RAM). The cooling system receives variable speed ram air during the flight of the aircraft and includes an automatically controlled valve for either directing high speed ram air to a precooling means prior to cooling the electronic components or directing low speed ram air directly to the electronic components without precooling. The automatically controlled valve is controlled by programmable logic module means for comparing the cooling efficiency of the electronic components by precooled ram air with the cooling efficiency of the electronic components by the non-precooled ram air. The cooling efficiencies are calculated from temperature measurements of the ram air at several locations in the system of the invention. Preferably, the ram air cooling means is an air turbine which extracts energy from the ram air to drive a compressor that compresses and discharges heated air that exists from the housing for the electronic components after the ram air has performed its cooling function. Patents. (jhd)

Descriptors :   *AIR COOLED, *AIRCRAFT EQUIPMENT, *COOLING AND VENTILATING EQUIPMENT, *PATENTS, AIR, AIR FLOW, AUTOMATIC, COMPUTER PROGRAMMING, CONTROL, COOLING, DRIVES, EFFICIENCY, ELECTRONIC EQUIPMENT, ENERGY, FLIGHT, FUNCTIONS, HEAT, INVENTIONS, LOGIC, LOW VELOCITY, MEASUREMENT, MODULAR CONSTRUCTION, RAMJET ENGINES, SWITCHING, TEMPERATURE, TURBINES, VALVES, VARIABLES, VELOCITY

Subject Categories : Air Condition, Heating, Lighting & Ventilating
      Flight Control and Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE