Renewables


System

Ground Source Heating Systems

Ground source heating systems, or 'ground source heat pumps' have developed a long way in recent years. They have become an affordable alternative to traditional boiler systems and can offer heating in winter and cooling in summer. Ground source heating systems utilise geothermal energy from the ground and either absorb this to provide heating, or release energy back into the ground to provide cooling.

Ground source heating systems require a heat exchanger, the component which is responsible for the exchange of energy to and from the ground. There are three main types of heat exchange systems, direct exchange systems utilise a recirculating refrigerant underground, closed-loop systems use a mixture of anti-freeze and water and open-loop systems use natural groundwater.

Worcester's range of 'Greenstore' ground source heat pumps are suitable for a variety of properties and are designed to be the sole source of heating and hot water in the home. 'System' heat pumps require a separate cylinder and can also be used with solar water heating and 'Combi' heat pumps have an integrated cylinder.

Air Source Heating Systems

Air-Source Heating Systems, or 'air source heat pumps' extract heat from the outside air in the same way that a fridge extracts heat from its inside. These systems convert the free and sustainable latent energy in the air into heat, delivering green, low-cost, energy-saving heating and hot water all year round. There are two main types of air source heat pump system; An air-to-water system distributes heat via your wet central heating system, whereas an air-to-air system produces warm air which is circulated by fans to heat your home.

Worcester's range of 'Greensource' air source heat pumps offers a choice of two systems; air-to-air or air-to-water, both offering significant savings compared with a conventional heating system.

Solar Hot Water

Another type affordable renewable energy heating system gaining popularity over the last few years, is the solar water heating system. These systems work by absorbing solar energy through a collector, usually mounted on the roof of a building. Typically, cold water is transferred to the collector where it is heated. The heated water is then transferred back to the building where it is stored in a hot water tank.

There are two main types of Solar Hot Water Systems; active and passive. The difference relates to the way water is transferred through the system, 'active' systems pump the water through the system whereas 'passive' systems rely on thermal convection and gravity.

Worcester's 'Greenskies' solar water heating panels use the power in both direct and diffused sunlight, converting the energy into heat, to produce hot water for the home and are designed to go with existing heating systems that use a cylinder to store hot water. A well-sized solar water heating system could provide up to 60% of your annual hot water requirements.