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About Renewable Heating

Renewable Technology Overview
Climate change is now accepted in the most part worldwide, which has increase the interest in renewable energy, giving rise to the availability of renewable technology to industry, commercial, social housing & private domestic properties. Technologies such as Batch Fed Biomass, Solar Thermal, Photovoltaic, Ground & Air Source Heat Pumps have come to the forefront.

Solar Thermal
Solar Thermal is considered the most affordable & easily installed in any application, industrial, commercial & domestic. It uses energy radiated from the sun to affect temperature rise in water. Solar thermal systems transform direct & diffused solar radiation transferring it into sensible heat via an external collector. Which in turn via a hot water storage facility produces carbon free hot water? Installation is a simple process taking up to two days for domestic installations, solar collectors can be sited on the roof or incorporated in the roof tiling (in roof system). The most popular types are flat plate collectors & more expensive, but more efficient evacuated tubes. Solar thermal can be incorporated into any system & fuel types.

Photovoltaic (Solar PV)
Solar PV panels are generally made up of monocrystaline cells which consist of multi-layer silicone conducting materials. The chemicals then react to the sunlight creating a direct current (dc), the more intense the sun light the more electricity is generated. The electricity generated is then passed through an invertor & converted for use as UK electricity, alternating current (ac). The electricity produced is counted in units of kilowatts (kW), which via the feed in tariff (FITs) are converted into payments from the government (subject to tariffs available at time of purchase). It is generally fitted up to 4 kW domestically & above for commercial/industrial.

Heat Pumps
Heat pumps are divided into three categories as follows.

Ground Source (GSHP)
Ground source heat pumps are generally used in houses/buildings with greater insulation properties & are a very affective low cost, low carbon heating & hot water production source. Using the solar gain in the ground or water course, ground source heat pumps produce heating & hot water using transfer of energy from glycol brine solution in ground collectors passing the through a compressor allowing the heat to be harvested into a traditional heating system. Ground source heat pumps are considered to be the best type of heat pump as they are not adversely affected by variations in air temperature. Installation of GSHP is more expensive than other heat pumps, but the efficiency is far greater when correctly installed. Collectors for ground GSHP can be installed in various ways, where land restriction is an issue boreholes are generally used, where land is not an issue deep set ground collectors are used. Another source of collector energy would be lakes & rivers, which are considered to be premium source of energy collection. It is generally considered that for every Kilowatt of energy used on average 4 kilowatts of energy is produced.

Air to Water Heat Pump (ASHP)
ASHP are easier to install than GSHP & are most popular in the retro fit market, the principles of operation & installation are basically the same accept, energy is collected from the air & not the ground/water course. An external unit draws air in, extracting the energy before expelling it & again the energy is transferred through a compressor allowing the heat to be harvested into a traditional heating system. It is generally considered that for every Kilowatt of energy used on average 3 kilowatts of energy is produced. ASHP are cheaper & quicker to install & most suitable where space is a premium.
Both types of systems are best used with under floor heating, but where radiators are used, radiators must be sized as a rule 35% larger than radiators used with fossil fuels.

Air to Air Heat Pumps (AAHP)
AAHP use energy absorbed from the air to provide all year round climate control (heating & cooling). Instead of using traditional methods of space heating (radiators/under floor heating), air is used. The heating element of AAHP is highly efficient & can give up to 5 kilowatts for every kilowatt used. However in cooling the efficiency is greatly reduced. This system is particularly good for replacing traditional air conditioning & is very useful as a solution in sports halls, classrooms, restaurants & conservatories.

Biomass
The phrase biomass is best used to describe fuel originating from vegetable material of recent origin (organic material). Rather than usual fossil fuels that take millions of years to develop. In the most part biomass fuel comes from tress or crops, but also from industrial/commcial waste as by products. Biomass fuel is considered carbon free, due to in its living state it absorbs carbon dioxide from the atmosphere, cancelling any environment effect from its combustion.
Biomass boilers are highly efficient, achieving 89% + efficiencies, they are particularly affective in older less insulated buildings as a replacement for Oil, LPG & electric based heating. The most common fuels are waste wood, logs, wood pellets, wood chip & cereal bales. Biomass is a very good solution to multiple building heating, such as industrial units, barn conversion sights, farm houses & district heating. When considering biomass, space for fuel storage must be taken into account.

Under floor Heating (UFH)
UFH is not necessarily considered renewable energy, however delivers highly efficient space heating of up to 25% savings off fuel bills against radiators. It is particularly suitable for new builds domestic/commercial & extensions & conservatories. UFH is a good partner with heat pumps as flow temperatures as low as 35 degrees will still generate effective results.

Microgeneration Certification Scheme (MCS)
MCS is an international recognised quality assurance scheme, through the government all installers, installations & products must be MCS certified for the end user (customer) to be eligible for financial incentives, such as Renewable Heat Incentive (RHI), Renewable Heat Premium Payment (RHPP).
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Renewable Heat (UK) Ltd
Unit 8, Anslow Park, Main Road, Anslow, DE13 9QE
Tel: 01283 515846
enquiries@renewableheatinstallers.com
Company Nr 7369986
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