A feasibility study of the utilization of residual engine heat for the operation of an automotive, absorption type, air conditioner

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Jackson, Daniel
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William D. Wolansky
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Industrial Education and Technology

The problem of this study was to build and test an absorption type air conditioning system for automotive use that would utilize residual engine heat. The engine was used as the system's generator and the radiator was used as the system's absorber. The intent of the testing was to determine harmful affects the system may produce and how effective the system was in cooling. Fuel consumption was measured to determine a possible difference, and pressure was monitored to control exceeding limits;A review of literature was given in providing information concerning the history, state-of-the-art, and future aspects of air conditioning; basic heat and thermodynamic theory; and refrigerants;Temperature data were collected, using a Commodore SX-64, and were analyzed. The engine and radiator data were analyzed using a completely randomized factorial analysis of variance. The evaporator data were analyzed with linear regression. As an interaction occurred in the engine and radiator data, linear regression was used to gain further information. Fuel consumption was measured for both treatments and subjectively compared, and pressure was visually monitored throughout testing;The variance attributed to the effect between groups and within groups, for both engine and radiator data, was significant beyond the.005 alpha level. The interaction in both cases was significant to that same capacity. The slope was positive in the evaporator data indicating no removal of heat took place. Therefore the operational efficiency was zero. The difference in fuel consumption was negligible and the pressure maintained safe limits;It was determined that the system, as used in this study, was not feasible for automotive use. The temperatures in the engine and radiator were too high, inhibiting the removal of heat in the evaporator.

Thu Jan 01 00:00:00 UTC 1987