Sponsored by
NEWS HEATPUMPS K
ilfrost has developed the Kil- frost GEO fl uid, a low viscosity fl uid that the company says will positively impact on both the environmental profi le and the per- formance effi ciencies of heat pump installations.
The development follows an industry-wide Ground Source Heat Pump Association (GSHPA) meeting, where serious concerns about the toxicity, effi ciency and application of some standard thermal transfer fl uids were expressed.
John Westerman, Kilfrost sales manager, said: “Existing thermal transfer fl uids provided a stark choice – toxicity and effi ciency, or safety and ineffi ciency. And the fact that mono-ethylene glycol (MEG) and ethanol based fl uids are being used extensively is evidence that commer- ciality won out in many cases.” Kilfrost’s research team set to work on developing and testing a low vis- cosity alternative and the result, just formally launched, was Kilfrost GEO. High effi ciency, boasting a good en- vironmental profi le, minimal physical
hazards and excellent system pro- tection, it is the fi rst advanced heat transfer fl uid engineered specifi cally for closed loop ground source heat pumps, the company says. Free from nitrates, nitrites, bor- ates, phosphates and other heavy metals, it outperforms MEG, MPG, Bio-PDO and ethanol-based heat transfer fl uids, while also leading to lower system pressure drops and lower pumping costs. It protects against scaling and corrosion, is classifi ed as non-hazardous accord-
ing to CLP/REACH, and if used in Ground Heat Exchangers compliant with MIS 3005 designs created by Dr Robin Curtis of GeoScience, has the potential to signifi cantly improve performance. The fl uid also off ers an excellent solution as a retrofi t or replacement for poor performing products.
During nine weeks in the Spring of 2016 Kensa Heat Pumps completed a compact and challenging heating upgrade programme featuring 11 of the Flagship Group’s properties on an estate in Fressingfi eld built in 2010. The project showcases the largest number of combinations of com- munal ground source heat networks installed on one site to date. The need for a new heating system became apparent when residents of the fi ve year old houses were stung with high energy bills from their ineffi cient electric panel convector heaters, with one customer report- ing bills of £500 a month. Energy for this system could only come from one provider, making switching to
reduce bills impossible. The 11 prop- erties at Fressingfi eld features fl ats, bungalows, semi-detached and de- tached houses.
The diverse make-up of the site demanded an innovative approach to the heating system design with each requiring a bespoke solution for the heat pump, cylinder and radiator lo- cation, resulting in fi ve distinct com- munal ‘heat networks’. The fi ve arrays demonstrate the diverse application of Kensa’s inno- vative ‘micro district’ approach, which features as few as two properties connected to one communal ground array in order to qualify for the non- domestic Renewable Heat Incentive (RHI) and Energy Company Obliga- tion (ECO) grant funding. The design provides each of the 11 property’s its own 6kW Shoebox ground source heat pump off er- ing heating independence and the freedom to switch energy suppliers, while providing effi ciencies across the communal heat network and a guar- anteed return from the RHI for the Flagship Group.
Space Air 12 August 2016
www.acr-news.com
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