Solar Water Heater Performance on Cloudy Days
In this article, we examine the difference in the performance of a solar water heater depending on whether there is adequate sunshine or cloud cover. To achieve this, we use data from the IOT DATA LOGGER project. In this particular case, the light sensor helps us determine if there is cloudiness in the area without having to be there or view the live webcam on Solar LIVE, which confirms the actual sky conditions via image.
In the graph, we see two clear cases:
A) On days 1, 5, and 6, there is heavy cloud cover and the daily temperature gain is 7–8°C. Depending on use, these degrees can compensate for the overnight heat loss.
B) On days 2, 3, and 4, there is steady sunshine and the daily gain is 20–25°C.
*The measurements are from early October; during the summer months, the gains are significantly higher. The graph and the light sensor values demonstrate the cloud cover. The weather conditions are otherwise pleasant, with daytime temperatures above 20°C.
MSc in Environmental Education
Specialization in Educational Robotics and STEM
Specialization in E-learning and Educational Content Production
Certified Adult Educator
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