TY - JOUR
T1 - A comprehensive thermodynamic and exergoeconomic comparison between single- and two-stage thermoelectric cooler and heater
AU - Nami, Hossein
AU - Nemati, Arash
AU - Yari, Mortaza
AU - Ranjbar, Faramarz
PY - 2017/9
Y1 - 2017/9
N2 - Energy, exergy and exergoeconomic analysis are carried out for single- and two-stage thermoelectric devices which can be used for either heating or cooling implementation. Coefficient of performance, exergetic efficiency and unit cost of heating/cooling power are investigated as the main target of energy, exergy and exergoeconomic analysis, respectively. A comprehensive comparison between single- and two-stage thermoelectric performances has outlined in different values of current and temperature difference between hot and cold sides. An effective range of current is defined for energy (COP > 0.5 × COPmax), exergy (ε > 0.5 × εmax) and exergoeconomic (cC/H < 2 × cC/H,min) analysis. Thermodynamic analysis results reveal that the maximized energy and exergy efficiency of two-stage thermoelectric is higher in comparison to the single-stage thermoelectric for both heating and cooling modes. Also, based on exergoeconomic results, minimum unit cost of single-stage thermoelectric product is less than that of two-stage thermoelectric for all temperature differences and effective range of current is more widespread for the case of single-stage thermoelectric. Obtained results reveal that the minimum unit cost of cooling power for single- and two-stage cooler is 3.967 and 16.22 $/kW h, respectively, for temperature difference of 10 K.
AB - Energy, exergy and exergoeconomic analysis are carried out for single- and two-stage thermoelectric devices which can be used for either heating or cooling implementation. Coefficient of performance, exergetic efficiency and unit cost of heating/cooling power are investigated as the main target of energy, exergy and exergoeconomic analysis, respectively. A comprehensive comparison between single- and two-stage thermoelectric performances has outlined in different values of current and temperature difference between hot and cold sides. An effective range of current is defined for energy (COP > 0.5 × COPmax), exergy (ε > 0.5 × εmax) and exergoeconomic (cC/H < 2 × cC/H,min) analysis. Thermodynamic analysis results reveal that the maximized energy and exergy efficiency of two-stage thermoelectric is higher in comparison to the single-stage thermoelectric for both heating and cooling modes. Also, based on exergoeconomic results, minimum unit cost of single-stage thermoelectric product is less than that of two-stage thermoelectric for all temperature differences and effective range of current is more widespread for the case of single-stage thermoelectric. Obtained results reveal that the minimum unit cost of cooling power for single- and two-stage cooler is 3.967 and 16.22 $/kW h, respectively, for temperature difference of 10 K.
KW - Exergoeconomic
KW - Exergy
KW - Heating/cooling
KW - Single- and two-stage
KW - Thermoelectric
UR - http://www.scopus.com/inward/record.url?scp=85021111164&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2017.06.100
DO - 10.1016/j.applthermaleng.2017.06.100
M3 - Journal article
AN - SCOPUS:85021111164
SN - 1359-4311
VL - 124
SP - 756
EP - 766
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
ER -