| 摘要 |
PROBLEM TO BE SOLVED: To supply hot water at a required temperature even when a compressor load factor is low, and to improve an exhaust heat recovery rate by suppressing heat radiation from exhaust heat recovery equipment.SOLUTION: An exhaust heat recovery system in an oil-cooled gas compressor includes a compressor body 3, an oil separator 6, gas piping 8 for sending the compression gas from which oil is separated by the oil separator to a demander, oil piping 7 for returning the oil separated by the oil separator to the compressor body, and an exhaust heat recovery heat exchanger 10 for recovering heat from at least either one of the compression gas or the oil. The system further includes a hot water storage tank 19, circulation circuits 17 and 18 for circulating a heat medium between the exhaust heat recovery heat exchanger and the hot water storage tank, a circulating pump 22 disposed on the circulation circuit, and a control device 32 for stopping the circulating pump or reducing a rotational speed thereof when a temperature of the oil or the compression gas subjected to heat exchange by the exhaust heat recovery heat exchanger is equal to or lower than a temperature of the hot water in the hot water storage tank. |
