Method and an arrangement for cooling or heating a machine casin

Details Method and an arrangement for cooling or heating a machine casin Method and an arrangement for cooling or heating a machine casin

1997-07-29

1999-11-16

Lazarus, Ira S.

Heat exchange

With timer, programmer, time delay, or condition responsive...

Control of variable thermal conductivity systems

165 60, 165 61, 165260, 165265, 165294, F28F 2700, F28F 2702, F24F 314, F25B 3700

Patent

active

059840048

ABSTRACT:
For cooling and/or heating a machine casing, a method and an arrangement is disclosed in which the machine casing is provided with cooling channels in which pipes are received. Between the pipes and the walls of the cooling channels, a cavity remains through which a cooling medium is circulated. A liquid heat exchange medium is circulated through the pipes. In order to vary the heat energy exchanged per time unit between the pipes and the machine casing, the kind of the medium circulating in the cavities is changed, or its composition is changed, or the flow velocity of the heat exchange medium is varied, or any desired combination of the above measures is realized. Thus, the heat flow, i.e. the exchange of heat energy per time unit, can easily be influenced by the provision of cavities between machine casing and heating or cooling medium by controlling its limiting heat exchange factors, i.e. thermal conductivity and heat transfer resistance.

REFERENCES:
patent: 4552303 (1985-11-01), Fisher et al.
patent: 4676300 (1987-06-01), Miyazaki

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