Shower heat exchanger: reuse of energy from heated drinking water for CO2 reduction

Z. Deng, S. Mol, J. P. van der Hoek
2015 Drinking Water Engineering and Science Discussions  
The heating of drinking water in households contributes for a significant amount to the emission of greenhouse gases. As a water utility aiming to operate climate neutral by 2020, Waternet needs to reduce its CO<sub>2</sub> emission by 53 kton yr<sup>−1</sup>. To contribute to this ambition, a pilot project was carried out in Uilenstede, Amstelveen, the Netherlands, to recover the shower heat energy with a shower heat exchanger from Dutch Solar Systems. An experimental set up was built in the
more » ... was built in the Waternet laboratory to compare field conditions and lab conditions. The energy recovery efficiency observed in the lab was 61–64 % under winter conditions and 58–62 % under summer conditions, while the energy recovery efficiency observed in Uilenstede was 57 % in December 2014. Based on the observations, 4 % of the total energy consumption of households in Amsterdam (electricity and gas) can be recovered with a shower heat exchanger installed in all households in Amsterdam, which also means a 54 kton yr<sup>−1</sup> CO<sub>2</sub> emission reduction.
doi:10.5194/dwesd-8-119-2015 fatcat:wu5yligaxbghdgcdv2hdpgd6gu