A practical investigation was conducted to demonstrate the effect of a glass cover on the efficiency of the Photovoltaic/Trombe wall using Nano-fluid (water/Al₂O₃) as a coolant. Two concentrations of nan-particles (0.5% and 1%) were tested. Using the glass cover on the front of the modified Trombe wall causes an increase in the solar cell temperature, which decreases the system's electrical efficiency but increases the room temperature, leading to improved thermal system efficiency. The highest recorded thermal efficiency value was 80% when using glass cover and 0.5% Nano-fluid at 2 p.m. Moreover, the implementation of a Nano-fluid as a coolant was increased the electrical efficiency. The maximum electrical efficiency was 14% at 1 p.m. In the absence of the glass cover and by using 0.5% Nano-fluid as a coolant. In general, using low concentration Nano-particles with cooling water improves the system efficiency, and increasing the Nano-particles concentration causes a negative influence on the system performance. The maximum total efficiency was 88% at 2 p.m. for the operation conditions (with a glass cover and using 0.5% Nano-fluid at the discharge of 300 L daily).

进行了一项实际调查，以证明玻璃盖对使用纳米流体（水/Al ₂ O ₃) 作为冷却剂。测试了两种浓度的纳米颗粒（0.5% 和 1%）。在经过改造的 Trombe 墙前面使用玻璃盖会导致太阳能电池温度升高，这会降低系统的电效率，但会增加室温，从而提高热系统效率。最高记录的热效率值为 80% 时使用玻璃盖和 0.5% 纳米流体在下午 2 点。此外，纳米流体作为冷却剂的实施提高了电效率。在没有玻璃罩和使用 0.5% 纳米流体作为冷却剂的情况下，下午 1 点的最大电效率为 14%。一般来说，使用低浓度纳米粒子和冷却水可以提高系统效率，增加纳米粒子浓度会对系统性能产生负面影响。在操作条件下（带玻璃盖和使用 0.5% 纳米流体，每天排放 300 L），最大总效率在下午 2 点为 88%。