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Ocean Thermal Energy Conversion: A renewable source of base load power?

Posted by Alex Barrett on 29 August 2017 at 11:10 am

Ocean Thermal Energy Conversion: A renewable source of base load power?

Ocean Thermal Energy Conversion (OTEC) is a renewable energy technology which generates electricity using sea water. 71% of the world’s surface is covered by ocean [1]. This means that a large amount of solar energy is constantly warming the upper layers of the oceans. This creates a strong…

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Should cogeneration be considered a green energy technology?

Posted by Alex Barrett on 22 June 2017 at 3:01 pm

Should cogeneration be considered a green energy technology?

We consume energy in two main ways, as electricity and as heat. These are produced, distributed and used in very different ways. Most electricity is generated by centralised power stations, with a relatively small fraction being produced at the point of use. It is then distributed, potentially ov…

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How do you assess the efficiency of a ground source heat pump?

Posted by Alex Barrett on 13 June 2017 at 10:57 am

How do you assess the efficiency of a ground source heat pump?

Ground Source Heat Pumps (GSHP) extract heat from the ground, and use it to produce hot water. The temperature in the subsurface remains around 11-12oC throughout the year [1]. By burying pipes just a few metres below the ground you can take advantage of this readily available supply of thermal e…

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Solar Chimneys: Passive solar ventilation and electricity generation.

Posted by Alex Barrett on 7 June 2017 at 3:15 pm

Solar Chimneys: Passive solar ventilation and electricity generation.

The solar chimney is designed to harness the fact that hot air rises, providing passive ventilation for a building. A solar chimney can be used to cool a house during warm weather, and generate heat during cold times of the year. There have also been efforts to build industrial scale solar chimne…

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Are Infrared panel heaters a good way to heat a room?

Posted by Alex Barrett on 9 May 2017 at 2:50 pm

Are Infrared panel heaters a good way to heat a room?

Infrared panel heaters are a relatively new way to heat your house. They work very differently to radiators, and have some advantages when it comes to energy efficiency. Infrared panel heaters use radiation to heat the room instead of convection. This means that they deliver heat directly to …

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How green is Hydroelectricity?

Posted by Alex Barrett on 5 May 2017 at 4:24 pm

How green is Hydroelectricity?

Large hydropower schemes account for the majority of the world’s renewable energy supply. Unlike wind and solar, hydroelectricity can provide a constant stream of renewable power, regardless of the weather or the time of year. Hydroelectric dams can be used to store power, and can quickly b…

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Which devices are the most energy intensive?

Posted by Alex Barrett on 25 April 2017 at 3:31 pm

Which devices are the most energy intensive?

We live our lives surrounded by devices. We work on computers, carry phones and tablets with us wherever we go. Kitchens are full of fridges, freezers, microwaves and washing machines. Some are more energy intensive than others, but all of them are contributing to high energy bills, and higher ca…

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How important is solar shading to passive solar building design?

Posted by Alex Barrett on 24 April 2017 at 12:10 pm

How important is solar shading to passive solar building design?

Trying to get indoor spaces to be the right temperature is a constant struggle. During cold parts of the year we use large amounts of energy for heating, but when warm weather arrives we suddenly want to cool down our buildings, either with fans or air conditioning. There seem to be relatively fe…

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What is the most energy efficient form of transport?

Posted by Alex Barrett on 12 April 2017 at 1:40 pm

What is the most energy efficient form of transport?

Many of you will be planning a long journey this bank holiday weekend and it’s worth considering which method of transport will be the most environmentally friendly. As you are probably aware, some transport methods are much more energy intensive than others and some have higher greenhouse …

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Thermal Storage: How much could you save?

Posted by Alex Barrett on 10 April 2017 at 2:34 pm

Thermal Storage: How much could you save?

Storing the energy produced by solar panels is a hot topic. Developments in battery storage for solar photovoltaic systems are constantly improving, but when it comes to storing energy, thermal systems have a lot of advantages. Solar thermal systems work by pumping a mix of water and antifree…

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