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GAS ENGINE DRIVEN HEAT PUMP WITH A SILENT EVAPORATOR FOR A GREENHOUSE.

Author(s) : LIEM S. H., PAASSEN A. H. C. van, MACHIELSEN C. H. M.

Summary

THE AUTHOR DESCRIBES A MODEL SIMULATING A GAS-ENGINE DRIVEN HE AT PUMP WITH A SILENT EVAPORATOR MADE UP OF A TUBE BUNDLE AROUND WHICH AIR CIRCULATES. THE ATMOSPHERIC AMBIENT CONDITIONS, TEMPERATURE, SOLAR RADIATION, WIND AND HUMIDITY ARE ALLOWED FOR. IF THERE IS FROST FORMATION ON THE TUBE, THE OVER-ALL HEAT TRANSFER COEFFICIENT INCLUDES A DRY COEFFICIENT, DEFINING CONVECTION TRANSFER AND A WET COEFFICIENT, DEFINING THE SUBLIMATION OF AIRHUMIDITY PASSING THROUGH THE FROST LAYER AND REACHING THE TUBE WALLS. IN ORDER TO DETERMINE THE FROST LAYER THICKNESS, A MODEL WAS MADE, BASED ON THE EMISSION AND THE RECEPTION OF INFRARED RAYS, MEASURING THE FROST LAYER IN SEVERAL STEPS. THE RESULTS OF THE MODEL AGREE WITH MEASUREMENT DATA.

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Pages: 239-244

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Details

  • Original title: GAS ENGINE DRIVEN HEAT PUMP WITH A SILENT EVAPORATOR FOR A GREENHOUSE.
  • Record ID : 1988-1645
  • Languages: English
  • Source: Development in refrigeration, refrigeration for development. Proceedings of the XVIIth international Congress of Refrigeration.
  • Publication date: 1987/08/24
  • Document available for consultation in the library of the IIR headquarters only.

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