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The article explains how, in recent years, a number of spontaneous downward heat transport systems have been proposed. These are based on the circulation of a liquid driven by bubbles of steam, generated by the liquid itself, or on the evaporation and condensation of a fluid which is conveyed back upwards to the evaporator. Independence from other forms of energy, insensitivity to freezing temperatures and no need for maintenance make this system ideal for solar applications in mountain or isolated areas, although other applications are also planned. The JRC-Ispra has developed a system based on the evaporation/condensation of a fluid, the operation of which is explained in detail, including its solar applications. The other three systems currently in operation, one in a textile industry and two for use in mountain areas, are also described.

Additional information

Authors: DE BENI G, JRC Ispra (IT);FRIESEN R, JRC Ispra (IT)
Bibliographic Reference: Article: Energie Alternative HTE, Vol. 13 (1991) No. 71, pp. 147-151
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