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Sep 09, 2023 47 likes •247 views

ME 462/562: Sustainable Energy an Exergy Analysis Spring 2014 Heat pumps Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis Heat pump typical layout Mechanical Engineering ME462/562 Sustainable Energy: Heat pumps

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Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

ME 462/562: Sustainable Energy – an Exergy Analysis Spring 2014

Heat pumps

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Heat pumps 2/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Heat pump typical layout

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Heat pumps 3/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Physical properties of R134a

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Heat pumps 4/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

An ideal refrigeration cycle

evaporator capillary compressor condenser

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Heat pumps 5/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

An experimental heat pump

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Heat pumps 6/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Operating conditions & properties

277.4 x

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Heat pumps 7/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

More conditions & properties

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Heat pumps 8/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Operating conditions

T (oC) 2.5 C 54.6 C (45.3 C) 22.8 C 1.3 C 15.9 C 16.0 C 14.0 C 16.9 C 24.9 C P (kPa) 220 230 1011 307 16.0 C 16.9 C (16.05 C) 9.1 C 13.1 C

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Exergy destruction rate vs. power

Ex. dest. Rate kW

0.010 Power kW 0.070 0.408 0.024 0.003 0.017 0.338 0.014 0.001 0.389 0.021 0.031 0.070 0.036

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Heat pumps 10/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Product vs. fuel

product kW 0.002 fuel kW 0.070 0.048 0.024 0.050 0.053 0.008 0.014 0.013 0.027 0.006 0.005 0.036 0.053

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Performance measures

exergy of product exergy of product exergy dest. / total

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Heat pumps 12/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Effjcient condensers

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Heat pumps 13/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Effjcient compressor

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Heat pumps 14/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

Turboexpander

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Heat pumps 15/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

exergy performance vs. dead state

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Heat pumps 16/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

COP vs. delivery temperature

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Heat pumps 17/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

performance vs. load

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Heat pumps 18/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

performance vs. temperatures

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Heat pumps 19/20 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis

exergy performance

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