Solar Thermal Collector

Hottel-Whillier-Bliss useful heat gain and efficiency analyzer.

Solar Irradiance (G) 800 W/m²

Ambient Temp (T_a) 25°C

Inlet Fluid Temp (T_i) 40°C

Mass Flow Rate (m_dot) 0.020 kg/s

Optical Efficiency (τ·α) 0.85

Heat Loss Coeff (U_L) 4.0 W/m²K

Collector Area (A_c) 2.0 m²

Heat Removal Factor (F_R):0.862

Useful Heat Gain (Q_u):1069.3 W

Outlet Temp (T_o):52.8 °C

Efficiency (η):66.8%

*Y-intercept is F_R(τ·α). Slope is -F_R U_L.