**4. Results and discussions**

*Wind Solar Hybrid Renewable Energy System*

in one of the house's elevations.

of solar radiation.

**Figure 4.**

*weather station.*

frost, birds' excreta, and any substance that may obstruct transmission

Due to the daily sun movement, the solar irradiance at the elevations of a house varies. This, however, influences the thermal impact of the windows at various elevations. Thus, four Li-Cor 200R pyranometers with one pyranometer at each of the house elevation were used to monitor the global irradiance at the various elevations. **Figure 5** shows a Li-Cor 200R pyranometer measuring the global irradiance

As illustrated in **Figure 5**, the pyranometers were mounted vertically on the outer surface of each of the perimeter wall. They were mounted at an even height of 1.8 m. By so doing, the solar radiation falling on the walls was measured. Li-Cor pyranometer uses a silicon photovoltaic sensor mounted in a cosine-corrected head to measure solar irradiance. Together, a variable shunt resistor circuit in the cable is used to convert the measured current to a voltage signal [30].

*(a) Floor layout of the house indicating the location of the indoor thermal sensor and (b) setup outdoor* 

*Li-Cor 200R pyranometer for monitoring global vertical irradiance on the east elevation of the* 

**212**

**Figure 5.**

*passive solar house.*
