Solar panels roof could cool you home

by Jasmina Nikoloska

The journal Solar Energy recently published a study that shows additional benefits of having a solar panel roof.

According to a team of researchers led by Jan Kleissl, a professor of environmental engineering at the UC San Diego Jacobs School of Engineering, a solar photovoltaic panels not only provide clean power, they are cooling too.

Measurements of the thermal conditions throughout a roof on a building partially covered by solar photovoltaic (PV) panels were conducted in San Diego in April, and thermal infrared imagery on a clear demonstrated that daytime ceiling temperatures under the PV arrays were up to 2.5 K cooler than under the exposed roof.

Heat flux modelling showed a significant reduction in daytime roof heat flux under the PV array. At night the conditions reversed and the ceiling under the PV arrays was warmer than for the exposed roof indicating insulating properties of PV.

Simulations showed a 38 percent reduction in annual cooling load.

The team believes that much of the heat is removed by wind blowing between the panels and the roof and the benefits could be larger if there is an opening where air can circulate between the building and the solar panel, therefore tilted panels will provide more cooling.

Also, the more efficient the solar panels, the bigger the cooling effect, said Kleissl.

Since the use solar panels are growing it is important to know about their positive side effects and their impact on buildings’ total energy costs, according to Kleissl.

Although he thinks that there are more efficient ways to passively cool buildings, such as reflective roof membranes, he believes that depending on roof thermal properties installing PVs could increase reduction in the amount of used energy to cool your residence or business.

It was estimated that savings in cooling costs amounted to selling 5 percent more solar energy to the grid than the panels are actually producing.

 

 

 

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2 Comments to “Solar panels roof could cool you home”

  1. Pretty good posting here,I never thought about that I will catch any information like that ,but your post really help me.Awesome things are sharing here.I like your post ,Now I am waiting for your next post.So keep writing. Solar panels

  2. Since the use solar panels are growing it is important to know about their positive side effects and their impact on buildings’ total energy costs

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