Acta Mechanica Slovaca 2024, 28(1):26-36 | DOI: 10.21496/ams.2024.005
Comprehensive Investigation of Solar Water Heater System Performance, Stratification, Charging, and Discharging Efficiency Using TRNSYS Software
- Faculty of Mechanics, Gaseous Fuels and Environment Laboratory, USTO-MB, El Mnaouer, BP1505, Bir El Djir 31000,Oran, Algeria
A study by dynamic simulation using the TRNSYS software was carried out to visualize the performance of a solar water heater with forced circulation for one year. Thermal needs in domestic hot water for an average family of six people living in the city of Oran in Algeria are covered by solar energy by up to 63%. Parameters such as the angle of inclination, the surface of the solar panel, the storage volume, the heat exchanger's surface, and the flow rate of the solar loop have been optimized. An analysis of the temperature stratification inside the balloon was presented, along with the calculation of charging and discharging efficiency. The influence of the position of the exchanger inside the tank has been shown on the temperature stratification and the charging and discharging efficiency.
Keywords: Solar water heater, solar fraction, TRNSYS, charging efficiency, discharging efficiency
Received: February 4, 2024; Revised: February 12, 2024; Accepted: February 22, 2024; Published: March 15, 2024 Show citation
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Berrebah, H., Baki, T., & Tebbal, M. (2024). Comprehensive Investigation of Solar Water Heater System Performance, Stratification, Charging, and Discharging Efficiency Using TRNSYS Software. Acta Mechanica Slovaca, 28(1), 26-36. doi: 10.21496/ams.2024.005
References
- SF - Solar fractionQc W Consumption energyQu W Useful energyQw W Loss energy by the tank wallsQaux W Auxiliary energyηt - Flat thermal panel efficiencye - Charging efficiencyηd - Discharging efficiencyQd W Energy released during discharging processQ (e,d) W Energy of heat exchangerQ (d,0) W Initial energy stored inside the water tankf - Consumption profil fractionm Kg/s Mass flowratecp J/Kg.K Specific heat capacityη0 - Optical conversion coefficient of the panela1 W/m<sup>2</sup>.K Heat loss coefficient by conduction of the panela2 W/m<sup>2</sup>.K<sup>2</sup> Heat loss coefficient by convection of the panelG W/m<sup>2</sup> Solar radianceAP m<sup>2</sup> Panel areaKb W/m<sup>2</sup>.K Heat transfer coefficient by convectionAb m<sup>2</sup> Tank areajuse m3/s Volume flow rate during dischargingVj m3 Volume of layer jje m3/s Volume flow rate of heat exchangerN - Layers' numberT(t,o) K Outlet temperature of the water tankT(t,i) K Inlet temperature of the water tankTi K Temperature inside the water tankTL K Local temperatureTev K average initial water temperature in the storage tankT(e,i) K Heat exchanger inlet temperatureT(e,o) K Heat exchanger outlet temperatureTj K water temperature of layer jDorahaki, S., Rashidinejad, M., Abdollahi, A., & Mollahassani-pour, M. 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