If London is to stand a chance become a net zero emissions city within a decade, mass deployment and funding of heat pumps will be critical, according to a new report. The Carbon Trust’s ‘Heat pump retrofit in London’, commissioned by the mayor’s office, also underlines the need for a simultaneous step change in building energy efficiency. That will require “significant” investment from central government, per the report. Meanwhile, smart heat pumps that can shift loads (also known as demand-side response, or DSR) have a major impact on the business case for retrofitting heat pumps, which are more expensive and disruptive than other approaches. The report aims to highlights key principles of good practice system design. It underlines the need for well designed and installed systems to unlock potential carbon emission savings of 60-70 per cent compared to conventional electric heating and 55-65 per cent when compared to an efficient gas boiler. These savings will increase as the grid decarbonises further. Given the sums involved for a city-wide retrofit, the report states that most building types will require some form of grant or subsidy to remove gas boilers, but that blocks of flats on electric heating and other buildings already due for major upgrades already present “strong” business cases and should be prioritised.
The Energyst 28th Aug 2020 read more »
Affordable Eco Housing; is this what we should be building? | 100% Independent, 100% Electric. Robert Llewellyn visits the inspiring Parc Eirin development in Cardiff to find out more about the affordable eco houses that are being built there, 220 houses to be exact! Each house has solar PV built in, batteries and ground-source heating, meaning these houses don’t burn anything at all! With the long-term cost savings, as well as the positive impact on the environment, this is how houses should, and will be built in the future. To find out more about Sero Homes head here: https://www.serohomes.com/ Technologies include Sonnen (electricity storage), Mixergy (thermal storage) & Kensa (ground source heat pump):
Fully Charged 27th Aug 2020 read more »
Paul Kenny: Special Advisor to Minister Eamon Ryan at Department of Communications, Climate Action & Environment. We’ve been asked whether heat pumps perform in cold weather, so we decided to look at the recent period +/- 0 days around the 1st of march. During this time Ireland suffered unprecedented amounts of freezing temperatures and snowfall. It is a common misconception that air source heat pumps (ASHP) do not perform effectively at lower temperatures. However, this is not the case and, in this blog post, data analysis on 16 houses that suffered such weather conditions aims to prove that ASHP not only perform effectively but also continue to save the homeowner money. Costs and energy requirement comparisons were made between the ASHP and oil fuelled heating. ASHP costs were based on Irish electricity rates– 16.15c/kWh day rate (8am to 11pm) and 8c/kWh night rate (11pm to 8am), with 13.5% VAT added and 5% online discount. Oil costs were based on an 85% efficient boiler with oil costs of 69c/litre- an equivalent of 10c/kWh. Although the coefficient of performance (COP) of the ASHP dropped in lower temperatures for this period, cost savings remained high- around 45% to 50% of oil heating costs. Furthermore, the highest cost savings percentages were found on the coldest days, where more energy was required for heating.
Linkdin (accessed) 28th Aug 2020 read more »