The aim of this study is to present the comparative results of experimental investigations of the thermal performance oftwo thermosiphon solar water heaters system (SWHS). The first uses the coconut fiber (CF), a local vegetable and the second, the glasswool (GW), an imported and expensive material, as thermal insulations. The maximum instantaneous efficiencies are, respectively, 65.30% and 58.7% with glass wool and coconut fiber while the mass flow rate values are, respectively, 0.0098 kg/s and 0.0078 kg/s with glasswool and coconut fiber. In addition, the calculated average values of F’(τα) and F’UL are, respectively, 0.79 and 5.86 Wm-2°C for thecoconut fiber collector and 0.8 and 5.26 Wm-2°C for the glass wool collector. The average heat exchanger effectiveness obtained for the twoSWHS are superior to 50%. As an environment-friendly and renewable material, coconut fiber is particularly suitable for thermalinsulation in order to save energy. The experimental results show the ability of the constructed solar water heater in providing hot watersuitable for maternity, hotels, households and encourage its implementation and utilization on a broad scale. The SWHS can be used inany weather conditions. ?2020. CBIORE-IJRED. All rights reserved.
展开▼
