ME 2334 Chapter : Chapter 5 Notes
Document Summary
Chapter 5 (cid:149) heat engines and refrigerators (cid:149) the second law of thermodynamics (cid:149) the reversible and irreversible process (cid:149) the carnot cycle (cid:149) the temperature scales (cid:149) the ideal and real machines (cid:149) typical devices and applications. Steps giving a cycle repeated in time (piston/cyl. type) Only part of the heat q remaining part is rejected, typically to the ambient. A car engine delivers 136 hp to the drive shaft with a thermal efficiency of 30%. The fuel it burns releases 35 000 kj/kg of energy. Find the total rate of heat rejected to the ambient and the rate of fuel consumption in kg/s. Thermal efficiency and conversion of hp from table a. 1 we get. H = 136 hp 0. 7355 kw/hp = 100 kw. / thermal = 100 / 0. 3 = 333 kw. Nearly all are closed loop flow between components. Details are inside the cv only net w and q"s cross the.
