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Table 5 System output results

From: Exergy and exergoenvironmental assessment of a geothermal heat pump and a wind power turbine hybrid system in Shanghai, China

Parameters

Definition

Value

\(\dot{\mathrm{m}}\) sup (kg/s)

The mass flow rate through expansion valve 1

0.02421

\(\dot{\mathrm{m}}\) main (kg/s)

The mass flow rate through the evaporator

0.5101

\(\dot{\mathrm{W}}\) comp1 (kW)

Compressor 1 work

9.26

\(\dot{\mathrm{W}}\) comp2 (kW)

Compressor 2 work

16.28

COPhp

Performance coefficient of heat pump

3.916

\({\dot{\mathrm{W}}}_{\mathrm{net}}\)(kW)

Wind turbine work

49.33

\({\dot{\mathrm{W}}}_{\mathrm{net}}\)(kW)

Net power output

22.03

ηen,total

The exergy efficiency of the total system

77.2%

ηex,total

The exergy efficiency of the total system

25.49%

fei

Exergoenvironment factor

0.9704

fes

Exergy stability factor

0.56

Cei

Exergoenvironmental impact coefficient

3.923

θei

Environmental damage effectiveness factor

3.806

θeii

Exergoenvironmental impact improvement factor

0.2627