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在现有的动力机械中,柴油机热效率是最高的,但也只有40%左右,其余的热量分别损失在排气(约35%)、冷却水(约20%)、润滑油以及其他(约5%)中。这些损失,目前只有排气热能可通过涡轮增压器,转变为一部份柴油机动力。还可通过废气节能器回收一部份。冷却水方面的损失,其温度常低于70℃,很难利用,几乎无法回收。如果考虑易于热量回收,将冷却水的温度提高,但因水温上升到80℃就会局部汽化,造成循环恶化,引起机件过热而出现故障。如对冷却系统密封加压,把水的汽化温度提高,会导致装置费用增加,又带有一定的
In the existing power machinery, the thermal efficiency of the diesel engine is the highest, but only about 40%. The remaining heat is lost in the exhaust (about 35%), cooling water (about 20%), lubricating oil and others %)in. These losses, currently only exhaust heat through the turbocharger, into a part of diesel power. You can also recover part of the exhaust gas economizer. Cooling water loss, the temperature is often below 70 ℃, difficult to use, almost impossible to recover. If easy heat recovery is considered, the temperature of the cooling water is raised, but the partial evaporation of the water temperature to 80 ° C causes the cycle to deteriorate, causing the part to overheat and fail. Such as sealing the cooling system pressure, the water vaporization temperature, will lead to increased device costs, but also with a certain