Solar thermal

The simplest solar power technology is a panel making hot water. Let's imagine we cover all south-facing roofs with solar thermal panels - that

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would be about 10 m2 of panels per person - and let's assume these are 50%-efficient at turning the sunlight's 110 W/m2 into hot water (figure 6.3). Multiplying

50% x 10 m2 x 110 W/m2 we find solar heating could deliver

13 kWh per day per person.

I colour this production box white in figure 6.4 to indicate that it describes production of low-grade energy - hot water is not as valuable as the highgrade electrical energy that wind turbines produce. Heat can't be exported to the electricity grid. If you don't need it, then it's wasted. We should bear in mind that much of this captured heat would not be in the right place. In cities, where many people live, residential accommodation has less roof area per person than the national average. Furthermore, this power would be delivered non-uniformly through the year.

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Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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