现代“标准火力发电厂”: t=580C→T=853K t,=30C→T=303K 303 7=1 65%→7实≈36% 8536 现代“标准火力发电厂”： t 580 C T 1 853K 0 1 = → = t 30 C T2 303K 0 2 = → = 6 5% 3 6% 853 303 c = 1− =   实 