Case Studies
Dittisham House
Overview
Dittisham House is an elegant, listed property from the 1760’s that has been repurposed to create an educational residence with the clients aim to reduce energy and carbon footprint as much as possible.
The nature of this listed property presented new challenges as fabric refurbishment had already been completed and no energy data was available to analyse. The house is heated using a kerosene oil boiler and has a small solar PV system on the roof. A hybrid system of air source heat pumps combined with additional Solar PV and BESS was proposed, along with the oil boiler as a backup source of energy. This resulted in a reduced dependency on kerosene boiler by approximately 40%.
Solutions
Air Source Heat Pump (ASHP): A 23kW heat pump to supply the base heat load for space heating, coupled with the original kerosene boiler for backup.
Solar PV: An additional 8.7kWp of Solar PV to the existing system to support the ASHP demand.
Battery Storage: 44 kWh system to store energy at lower tariff during the nights.
Energy Management: Optimisation of ASHP, combined with renewable energy sources and conventional oil boiler for backup.
Results
Savings: The proposed system utilises ~83% on site generation, and reduces kerosene consumption by approximately 40%.
Emissions: ~8.9 tonnes of CO2 reduced annually by reducing the utilisation of kerosene boiler and an additional ~1.34 tonnes of CO2 by the Solar PV.
Conclusion
Dittisham House, presented a unique challenge as measures was taken in order to achieve efficient energy usage. Switching the load to ASHP reduces the costs of kerosene by 40% and shifts the demand to cleaner electricity. The BESS and solar PV shifts the majority of the demand to a cheaper night time tariff period, reducing electricity bills by upto 66%.