<P> This model does a better job of predicting how well real - world heat engines can do (Callen 1985, see also endoreversible thermodynamics): </P> <Table> Efficiencies of power stations <Tr> <Th> Power station </Th> <Th> T c (\ displaystyle T_ (c)) (° C) </Th> <Th> T h (\ displaystyle T_ (h)) (° C) </Th> <Th> η (\ displaystyle \ eta) (Carnot) </Th> <Th> η (\ displaystyle \ eta) (Endoreversible) </Th> <Th> η (\ displaystyle \ eta) (Observed) </Th> </Tr> <Tr> <Th> West Thurrock (UK) coal - fired power station </Th> <Td> 25 </Td> <Td> 565 </Td> <Td> 0.64 </Td> <Td> 0.40 </Td> <Td> 0.36 </Td> </Tr> <Tr> <Th> CANDU (Canada) nuclear power station </Th> <Td> 25 </Td> <Td> 300 </Td> <Td> 0.48 </Td> <Td> 0.28 </Td> <Td> 0.30 </Td> </Tr> <Tr> <Th> Larderello (Italy) geothermal power station </Th> <Td> 80 </Td> <Td> 250 </Td> <Td> 0.33 </Td> <Td> 0.178 </Td> <Td> 0.16 </Td> </Tr> </Table> <Tr> <Th> Power station </Th> <Th> T c (\ displaystyle T_ (c)) (° C) </Th> <Th> T h (\ displaystyle T_ (h)) (° C) </Th> <Th> η (\ displaystyle \ eta) (Carnot) </Th> <Th> η (\ displaystyle \ eta) (Endoreversible) </Th> <Th> η (\ displaystyle \ eta) (Observed) </Th> </Tr> <Tr> <Th> West Thurrock (UK) coal - fired power station </Th> <Td> 25 </Td> <Td> 565 </Td> <Td> 0.64 </Td> <Td> 0.40 </Td> <Td> 0.36 </Td> </Tr>

Describe the energy transformations and transfers made by a heat engine