METHOD FOR OPERATING A COMBINED HEAT AND POWER DEVICE, COMBINED HEAT AND POWER DEVICE AND USE OF A LUBRICANT
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United States of America Patent
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Feb 12, 2015
app pub date -
Jul 31, 2014
filing date -
Aug 9, 2013
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Abstract
This disclosure relates to a method for operating a combined heat and power device, wherein carbon dioxide as a refrigerant (17) is compressed in a compressor, wherein the carbon dioxide is carried along a refrigerant circuit and routed back to the compressor via a collecting vessel (5). The method is distinguished by the fact that the compressor is lubricated with a lubricant (15) which has a density of more than 1004 g/l, and that a hot gas temperature in the compressor is held below a predetermined value, above which overheating and/or ageing of the lubricant occurs.
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