| 摘要 |
<p>1. Use of a large area, flat heat exchanger with two separate duct systems, having in each case at least one supply line and one discharge line for flow media, as well as flow ducts for the particular flow medium interconnecting the supply and discharge lines, the flow ducts running parallel to one another, characterized in that the flow ducts are arranged on a horizontal surface, that during the first usage period the first duct system is supplied with a heat transfer flow medium used for heating purposes and that during a second usage period water is so applied to the horizontal surface that the flow ducts are directly located in the water layer and through the second duct system flows a refrigerant medium, e.g. salt water for heat extraction and therefore for freezing the water for producing an ice surface.</p> |
