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SASIE launches DewTherm

a three in one solution

Dewtherm Barn

We have just launched our latest product, which tackles flooding issues, captures rainwater and offers a complete renewable energy package. The DewTherm system has been developed with funding from DEFRA and the Small Business Research Initiative (SBRI). We were one of just six UK companies to win funding to develop new products that will help the UK’s homes and businesses to adapt and survive our changing climate. The support has helped to build a demonstrator on a farm building in North Nottinghamshire.

Firstly, DewTherm manages surface water by creating storage underground. The pilot system has one metre deep trenches, filled with recycled aggregate, which will help to drain away water that normally collects around the building. The water will seep slowly into a nearby brook, reducing the risk of localised flooding.

Secondly, the system provides rainwater collection, which can be used for flushing toilets, washing machines and for animal drinking water. Water from the roof is collected and filtered and finally pumped to a 7,000 litre tank at the top of a nearby hill, for gravity feed to drinking troughs and for use in the barn.

The final component of DewTherm lies in the base of the drainage trenches, where 100m of piping will collect and store heat. The pipes connect to a heat pump, which we have manufactured. The 15kW heat pump can take heat from either water or air. Solar panels on the roof of the barn provide solar electricity plus we have developed a novel method of stripping heat from behind the panels, sending the hot air direct to the heat pump or through a radiator and into the ground.

SASIE Heat Pump

The whole system is managed at a single point by our novel smart controller. This switches the heat pump on and off and controls the temperatures in five zones of under floor heating in the barn. It also sends a call to the rainwater harvester pump when water levels are low in the storage tank as well as determining where excess heat from the roof will be delivered.

DewTherm is  initially targeted at the farming sector and the more aware self-builders who want a sustainable solution for water and energy. With  five million homes at risk of flooding in England and water shortages causing concern in the South-East, maybe DewTherm can ease the pain and help generate clean energy for the future.

For further details read our case study for the demonstrator: DewTherm Case Study

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