A Social Practices-based Microsimulation Model for Estimating Domestic Hot Water Demand in the UK (BECC 2017)

Poster presented at BECC 2017, Sacramento, California, 15-16th October 2017

Transcript

1. Manouseli, D., Anderson, B. A Social Practices-based Microsimulation Model for Estimating Domestic Hot Water Demand in the UK IMPETUS project Understanding drivers of domestic hot water consumption such as the weather, demographics, technological change and personal water use practices is essential for the modeling and long term planning of water supply infrastructure and energy demand scenarios. However, limited attempts to effectively address uncertainties related to climate change, variation in social practices and in responses to water and energy efficiency measures in hot water demand models have been reported. Because of growing population and changing water use patterns in the UK, more than half of the current public water supply is for residential use, while heating water is the second largest source of energy use in the home. www.energy.soton.ac.uk * e-mail: d.manouseli@soton.ac.uk Introduction Fig.1: Impetus Model IMPETUS Model Fig 2. Hot water micro-components in the households, adjusted for baseline climate conditions. Different colours represent different years (1994-2014). Conclusions & Future Work Contact: Despina Manouseli d.manouseli@soton.ac.uk Faculty of Engineering & the Environment (Energy and Climate Change Division) Southampton | +44 (0) 7843189293 The opportunity - Intervention Switching to an eco-showerhead could lead to £55 annual savings on energy bills for an average household. Thus, whilst controlling domestic water demand is a priority in the UK, water efficiency is known to also increase energy efficiency through reduced demand for heated water. About 23% of a household's heating bill is from heating the water. IMPETUS MODEL Household Practices – Survey Data Water Use Micro- components Historical Drought Records for Southeast UK Weather Data Water Efficiency Intervention Scenarios Effect of Drought/Efficiency Interventions on Water and Energy Demand Fig 4. Hot water saving for shower under the baseline efficiency scenario Fig 5. Hot water saving for shower under the drought (additional) efficiency scenario The models suggest that the installation of efficient showerheads appears to have a substantial impact on not only water consumption but also, as a consequence, energy demand. Future work will assess the effect of scenarios of other ‘water efficiency’ interventions as well as ‘water use’ behaviour change on energy demand. We hope this will identify opportunities for water-energy nexus interventions to reduce demand on both resources at the same time. Fig 3. Hot water for showers, under the baseline efficiency (hypothesized a 2% yearly uptake rate) and the drought efficiency scenario (hypothesized as a doubling (Developing/Recovering), trebling (Drought) or quadrupling (Severe drought) of the monthly rates of uptake)