What: Energy exchange between buildings and greenhouses
Where: Westland, Netherlands
Who: Vestia Westland, Ceres projects, Municipality Westland en Prominent growers association
When: since 2012
Source: Living in Hoogeland

Exchanging energy

Greenhouses and a residential district exchanging their energy. It can be done, and indeed was done for first time worldwide in the Netherlands, in the Westland district of Hoogeland. Since the end of 2012, the closed greenhouse of the Prominent growers association, homes and various commercial premises have been connected to each other.

Hoogeland is an innovative project that contributes to a sustainable society. It makes greenhouse horticulture a supplier, rather than a consumer of energy. This unique exchange of energy is a win-win situation. The greenhouses supply the excess solar heat to the residential district, and in return the growers receive cold with which to cool their crops in the summer. This not only produces substantial energy savings, but also reduces CO2 emissions by over 40%.

A greenhouse has a natural warmth surplus: annually a greenhouse has five times as much solar heat inside as needed for growing crops. Where they previously opened the greenhouse windows in order to get rid of the excess heat, Hoogeland now stores the heat in groundwater sources. During wintertime the stored hot water get pumped through heat exchangers and passed back into the greenhouses.

Watch the video here explaining how it works: