Refrigeration / Refrigerants & Reclaim

First HFO Chiller Installed

HFO chiller
British-based Klima-Therm has installed what it said was the world’s first Turbomiser chillers equipped with an HFO refrigerant.
British-based Klima-Therm has installed what it said was the world’s first Turbomiser chillers equipped with Turbocor compressor HFO refrigerant. HFOs are being promoted by some f-gas manufacturers as the next generation of refrigerants beyond HFCs as other sectors of the industry promote HCs and CO2 as the next generation.

The company has installed two of the HFO chillers in a department store in Milton Keynes, a city about 50 miles northwest of London. The company also said it received a second order for an installation of HFO Turbomiser machines for a retail development in the southwest part of England.

Tim Mitchell, Klima-Therm sales director, said, “The HFO Turbomiser is a very attractive combination. In its favor is the exceptional and proven energy performance of Turbomiser, which can cut energy use by up to 60 percent, coupled with the very low global warming potential [GWP].”

The refrigerant used was HFO-1234ze with a GWP of 6 compared to 1,300 for HFC-134a. (Another low-GWP refrigerant, HFO-1234yf, is being introduced in automotive a/c in Europe.)

“This is a huge difference in terms of environmental acceptability. End users have to take notice — and they are,” said Mitchell.

The first project involved the installation of two chillers as part of a store refurbishment. Each of the chillers is rated at 230kW, making a combined cooling capacity of 460kW.

The chillers will supply all the cooling needs for the store, delivering comfort cooling via the store’s chilled-water-based air conditioning system.

Unit Design

Tests carried out by manufacturer Geoclima at its testing facility in Italy have demonstrated that the HFO Turbocor-based Turbomisers operate with a full-load COP of around 4, Mitchell said.

It is known that use of R-1234ze results in a loss of cooling capacity of around 24 percent compared with HFC-134a across various application conditions, he said. But he noted that means power absorbed is around 27 percent less, giving an overall COP for the HFO actually better than R-134a.

“The design of the new HFO Turbomiser compensates for the reduction in capacity, employing slightly larger heat exchanger surfaces and clever design and component layout,” said Mitchell. “The HFO Turbocor compressor employed, type TG310, is based upon the existing model TT350.”

As a result there will be a slight cost premium over the standard Turbomiser chiller running on R-134a, he noted. However, Klima-Therm believes cost comparisons per kW of cooling compared to other low GWP solutions will be attractive, especially given the environmental benefits of using low-GWP HFOs.

A further important benefit of the HFO solution is that it may overcome the equipment siting and charge capacity restrictions that accompany the use of other refrigerants, such as hydrocarbons, the company said.

Klima-Therm said that HFO-based chillers can be as flexible in use as standard HFC machines.

Publication date: 9/24/2012

Did you enjoy this article? Click here to subscribe to The NEWS Magazine

You must login or register in order to post a comment.



Image Galleries

2014 World Energy Engineering Congress

Scenes from the 2014 World Energy Engineering Congress in Washington, D.C.


NEWSMakers: Howard Weiss
Howard Weiss, executive vice president, HVAC Excellence stopped by The NEWS’ booth at the AHR Expo to discuss HVAC Excellence’s upcoming conference, networking opportunities at large expo’s, and much more. Posted on Feb. 27.
More Podcasts


NEWS 02-23-15 cover

2015 February 23

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe

HVAC Trends

The NEWS regularly reports on HVAC industry trends in our weekly issues. What trends do you see?
View Results Poll Archive


2015 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

More Products

Clear Seas Research


Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.


Magazine image
Register today for complete access to Get full access to the latest features, Extra Edition, and more.


facebook icontwitter iconyoutube iconLinkedIn i con