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“Go for Green”

When to choose Solar Thermal?

If you have a south facing roof, harnessing free energy from the sun is an ideal choice for your hot water production. Combine your solar panels with a heat pump and you can take advantage of solar energy whenever it is available, without being fully dependant on it. Integrating NIBE solar panels with a new gen­eration NIBE heat pump means that you don’t have to have a separate solar controller as the new generation controller on the heat pump will control both systems.

How does it work?

Solar radiation drives all natural cycles and processes on earth such as rain, wind, photosynthesis, ocean currents and several others that are important for life. From the very beginning of life, the overall world energy need has been based on solar energy. All fossil fuels (oil, gas, coal) are a result of solar energy. The energy from the sun acting on the earth’s surface, over a 15 minute period, is more than the earth’s total energy requirement for a year. The amount of yearly global radiation on a horizontal surface may reach over 2,200 kWh/m2 in sunny regions. In Northern Europe, the maximum values are 1,100 kWh/m2. The supply of solar radiation in UK differs by a factor of 10 between summer and winter. Global radiation comprises direct and diffused radiation. As sunlight passes through the atmosphere, some of it is absorbed, reflected and scattered by air molecules, clouds and dust particles, this is known as diffused radiation. The portion of radiation that hits the earth’s surface without any change in direction is known as direct radiation. In the UK, diffused radiation makes up between 40% (May) to 80% (December) of the total solar energy available in a year. This energy can be absorbed and used by solar panels transferring heat to create hot water. This water can then be used for domestic hot water, space heating and pool heating.

Solar energy is created by light and heat which is emitted by the sun in the form of electromagnetic radiation. NIBE solar panels absorb this heat in a liquid and pump it into your hot water cylinder. The temperature of your hot water is dependent on the heat from the sun. A correctly designed system will provide over 60% of your hot water needs.

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