F - Mech Eng,Light,Heat,Weapons – 24 – D
Patent
F - Mech Eng,Light,Heat,Weapons
24
D
F24D 19/10 (2006.01) F24D 11/02 (2006.01)
Patent
CA 2065391
ABSTRACT In a process for converting solar energy into heat a solar collector is employed, which consists of a plurality of mutually-coupled collector elements placed on the outside of a building or the like and coupled to a heat transfer fluid network. Each of these collector elements comprises a col- lector channel located on the bottom of a collector chamber delimited by a transparent cover, which collector chamber normally is connected to a high-temperature reservoir via a connecting line, until a control valve arrangement is re- versed and the collector channel is disconnected from the high-temperature reservoir and connected to a low-temperature reservoir for heat pump operation when the temperature of the circulating heat transfer fluid falls below a predetermined minimum value detected by means of a temperature sensor associated with the collector channel. To ensure that on transition from the low-temperature reservoir operation to the high-temperature reservoir operation no heat transfer fluid having a lower temperature as compared to that of the fluid in the high-temperature reservoir can enter said high- temperature reservoir, the temperature of the heat transfer fluid as well as the temperature in the collector chamber is measured, both temperatures are compared so as to derive a temperature differential value, the control valve arrangement which is associated with a short-circuit branch running be- tween the forward branch and the return branch is reversed dependent on whether a predetermined temperature differential value is reached so that the short-circuit branch is opened, the temperature of the heat transfer fluid in the collector channel as well as the temperature of the heat transfer fluid in the high-temperature reservoir is measured, both tem- peratures are compared so as to derive a temperature differ- ential value and, finally, the control valve arrangement is reversed dependent on whether a predetermined temperature differential value is reached so that the short-circuit branch is closed but the connection to the high-temperature reservoir is opened.
Kirchmayer Leonhard
Robic
LandOfFree
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