| 摘要 |
PROBLEM TO BE SOLVED: To perform a high precision estimation of gas consumption amount of a gas engine constituting an air conditioner.SOLUTION: An estimated value derivation method is carried out by: calculating a refrigerant circulation amount q on the basis of a rotational speed Ncp of a compressor, density &rgr;suc of refrigerant, displacement volume V and volumetric efficiency &eegr;vol of the compressor; calculating a compressor suction enthalpy Hsuc on the basis of a compressor suction temperature Tsuc and a compressor suction pressure Psuc; calculating a compressor discharging enthalpy Hdis on the basis of a compressor discharging pressure Pdis; calculating a compressor required power B on the basis of a refrigerant circulation amount, a compressor suction enthalpy and a compression discharging enthalpy; calculating an engine torque E on the basis of a rotational speed Neg of a gas engine and the compressor required power B; calculating an engine efficiency &eegr;eg on the basis of the rotational speed Neg of the gas engine and the engine torque E; and deriving an estimated value of gas consumption amount of the gas engine on the basis of a compressor required power and the engine efficiency. |
