Techno-Econo-Enviro Assessment of Photovoltaic-Thermal (PV-T) System for Residential Use in Iran Based on Köppen Climate Classification

Table 2

Equations governing the PV-T system.

Formula	Definition	No. of equation
	Total energy efficiency of PV-T systems [25]	(1)
	Thermal efficiency [25]	(2)
	Electrical efficiency [25]	(3)
	Calculation of electrical efficiency according to module temperature [17]	(4)
	System performance	(5)
	Impeded CO2	(6)
	Fuel saving	(7)