MECHENG 235 Lecture Notes - Magnetic Refrigeration, Rankine Cycle, Thermal Efficiency
29 Apr 2014
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Me 235 thermodynamics i / winter 2014 / section 002. 5. 30 in a rankine cycle steam power plant 0. 9 mw is taken out in the condenser, 0. 63 mw is taken out in the turbine, and the pump work is 0. 03 mw. If everything could be reversed find the cop as a refrigerator. 5. 51 the lowest temperature that has been achieved is about 1 10 6 k. to achieve this, an additional stage of cooling is required beyond that described in the previous problem, namely nuclear cooling. This process is similar to magnetic cooling, but it involves the magnetic moment associated with the nucleus rather than that associated with certain ions in the paramagnetic salt. Suppose that 10 j is to be removed from a specimen at an average temperature of 10 5 k (10 j is about the potential energy loss of a pin dropping 3 mm).
