For a number of years now, GasTerra has been working on the successor to the high-efficiency boiler: the electricity generating condensing boiler (HRe boiler). This system produces both heat and electricity (power). The technology applied here is also known as micro-combined heat and power (micro-CHP). The device consists of a high-efficiency boiler and a small natural gas engine. The engine drives a generator which generates electricity. Hardly any energy is lost, as the residual heat from the engine is used for space heating and water heating. This boiler produces electricity only if there is a need for heat in the house. That electricity can be used directly in the house. If more electricity is produced than can actually be used, this can be temporarily ‘parked’ in the public electricity grid.
On balance the user buys somewhat more natural gas, but much less electricity. A reduction in energy costs of between 15 and 25 per cent and a reduction in CO2 emissions of approximately 20 per cent can be achieved with the high-efficiency electricity-generating boiler. This new type of boiler has been designed to be suitable as a link in new, sustainable energy processes, for example by connecting it to a solar combi boiler.
In 2006, this boiler passed through the laboratory phase and after the technical test phase is on small-scale field trials in people’s homes. During the year under review, the company made a start on setting up a large-scale practical test of some 10,000 boilers during the period 2008 - 2009 as a preliminary to further market introduction, which is anticipated for around 2009/2010.
By large-scale linking and central steering of decentralised energy generators, such as HRe boilers, PV solar panels and wind turbines, the need for power stations (which have relatively low efficiency) can even be reduced.
The company is also looking at new projects in addition to micro-CHP, such as mini-CHP, suitable for use in commercial environments and small companies. These transitional activities are being carried out as part of the CalorForce programme.
