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The heat energy loss of methane liquid is the most important reason for low temperature of methane biochemical reaction in cold area by energy-flow analysis. The heat energy recovery of methane liquid can build a self-energizing system. Vegetable greenhouses and birdhouse or livestock barn in cold area need heating in winter, in order to supply the most heat energy, invented the methane-eletricity-heatpump...
The correct estimated operating cost is a critical factor to determine and choose a heating and air conditioning system. Because thermal load is the base of calculation of operating cost, so the causes, features and influencing factors of different loads were analyzed and classified. A new estimating method of annual cost was given, it was on the basis of standard mean area load index and correction...
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