HEAT PUMPS CASE STUDY
Solar thermal panels are controlled by the heat pump system
cascade system. The fi rst air-source unit is dedicated to hot water. A VPB500 500-litre hot water tank is linked to a NIBE solar thermal system, with a 500-litre buffer tank for the central heating. The underfl oor heating system throughout the property is run off this buffer tank, which provides back-up in the event that all the zones shut down. Linking in to the air-source system are three solar panels with a pump station and heat exchanger, where the potable water passes through and then returns to the VPB cylinder. The solar thermal panels are designed
to work with the heat pump, which means that it is not necessary to have a separate solar controller – the built-in heat pump controller is able to control the solar panels. Hindhaugh Homes will now only install renewable heating systems within their properties, not only for environmental reasons but because they also gain an extra selling point – although their developments may be large, luxurious barn conversions, they won’t cost the earth to heat. CJ
● JACKIE LAMBON is marketing manager for NIBE Energy Systems
The new owners knew that they were going to be high energy users in this very large property, as they were limited in what they could do to prevent heat loss
Low carbon plan: Firms back heat pump strategy
Permitted Development Rights from 42 dB to 45 dB to limit installation complexity; and
A family poses with their new air-source heat pump, installed in social housing
A number of energy companies and heat pump manufacturers have jointly backed a strategy that they claim shows how industry and government can achieve a ‘radical decarbonising’ of residential heating in the UK by 2030.
They have commissioned a report by Ecuity
Consulting, which argues that a long-term regulatory strategy must be in place, alongside necessary investment, to encourage heat pump uptake. According to the report, elements of
this regulatory plan could include:
Looking into innovative solutions to link the Green Deal with the Renewable Heat Incentive (RHI) to enable consumers to obtain up-front capital;
Reviewing the case for raising the noise threshold for air source heat pumps under
30 CIBSE Journal August 2012
Reviewing specifi ed default effi ciency values for air source heat pumps, and recognition of hybrid heat pump solutions under the Standard Assessment Procedure (SAP), to refl ect the performance of new products. The report contains the results of detailed modelling of RHI possibilities for different tariff and duration options. It proposes setting a tariff duration of less than 10 years under RHI Phase 2 for the domestic sector, to combine cost effectiveness with adequate consumer incentive.
The report calls for the use of Building Regulations, in retrofi t as well as in new build, to push the decarbonising of residential heating systems to new limits towards the end of the decade, without the fi scal burden that accompanies incentive schemes. It claims this would allow a range of low carbon heating technologies to compete fairly, and would move the UK’s heating stock beyond today’s default option of high effi ciency gas boilers. It says a similar change in Building Regulations, successfully transformed the residential heat market by outlawing lower effi ciency systems. The backers of the report are British Gas, EDF Energy, e.on, Daikin, Kingspan, Mitsubishi Electric, NIBE, and Vaillant. The report 6.8 million Heat Pumps by 2030;
from Vision to Reality can be downloaded at
www.quity.com under the Knowledge section.
www.cibsejournal.com
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