EXPERIMENTAL EVALUATION OF HEAT EXCHANGE BETWEEN WATER SURFACE AND ATMOSPHERE

Gunther Barg, Horst Schwarze, Gerhard Visscher

Abstract


The heat balance of a water body mainly depends upon the heat exchange processes at the water surface. An experimental method has been developed for determining the heat exchange, the exchange coefficient and the equilibrium temperature. The measuring equipment consists of two similar, well insulated pools which are exposed to the meteorological conditions of the Lower Weser River, Germany. The water temperature of the first pool (Ti) is artificially adjusted to the actual river temperature either by cooling or heating. The temperature of the second pool (T2) is held constant above the temperature T-| . The difference in power inputs required W2 - W-j is equivalent to the net rate of heat exchange due to the increase of temperature to AT above the river temperature.

Keywords


water surface; water/air interface; heat exchange

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