Science – Society – Technology
Sign | Definition | Amount | References |
---|---|---|---|
P0[kPa] | Ambient pressure | 101.2 | – |
T0[°C] | Ambient temperature | 6 | (Huang et al. 2021) |
P1[kPa] | Evaporator pressure | 200 | (Pishkariahmadabad et al. 2021) |
P2[kPa] | Condenser pressure | 400 | (Pishkariahmadabad et al. 2021) |
P9[kPa] | Heat exchanger temperature | 1200 | (Pishkariahmadabad et al. 2021) |
Tsoil[°C] | Soil temperature | 15 | (Zhai and Yang 2011) |
ηcomp1 | Compressor 1 efficiency | 0.8 | (Pishkariahmadabad et al. 2021) |
ηcomp2 | Compressor 2 efficiency | 0.8 | (Pishkariahmadabad et al. 2021) |
ηgeopump | Geothermal pump efficiency | 0.9 | (Pishkariahmadabad et al. 2021) |
T5[°C] | Heated water temperature | 35 | (Pishkariahmadabad et al. 2021) |
T6[°C] | Entrance water temperature | 30 | (Pishkariahmadabad et al. 2021) |
T7[°C] | Geothermal pump entrance temperature | 7 | (Pishkariahmadabad et al. 2021) |
T8[°C] | Geothermal pump exit temperature | 11 | (Pishkariahmadabad et al. 2021) |
\(\dot{Q}cond\)[kW] | Condenser capacity | 100 | (Pishkariahmadabad et al. 2021) |
\({U}_{s}[\frac{W}{{m}^{2}k}]\) | Soil heat transfer coefficient | 12 | (Sanaye and Niroomand 2009) |
F | The ratio of the number of hours of maximum load to the total number of hours | 0.4 | (Sanaye and Niroomand 2009) |
\({k}_{gl}[\frac{W}{mk}]\) | Heat transfer coefficient of the tube | 0.45 | (Sayyaadi et al. 2009) |
\({d}_{i}\)[m] | Internal diameter | 0.0218 | (Sayyaadi et al. 2009) |
\({d}_{o}\)[m] | Outer diameter | 0.0267 | (Sayyaadi et al. 2009) |
V \([\frac{m}{s}]\) | Fluid speed inside the geothermal tube | 1 | (Sayyaadi et al. 2009) |