Heat pipes create new way of freezing


Dr Hussam Jouhara is partnering with Air Products to bring the technology to commercial reality

UK: Scientists claim to have engineered a new way of freezing as low as -180C using liquid nitrogen and heat pipe technology.

The new cryogenically-cooled heat pipe technology, engineered by scientists at Brunel University London, could have benefits in the medical sector and is said to avoid the dangers often associated with liquid nitrogen.

“At the heart of the new system is the concept that what we needed was to be able to efficiently transfer cold,” explained Dr Hussam Jouhara of Brunel’s Institute of Energy Futures.

“The cold in our design comes from liquid nitrogen. But unlike conventional cold storage using the liquefied gas we don’t need to physically transfer the nitrogen. The cryogenic heat pipe is literally just moving the cold.

“In safety terms this has major implications as in the US alone eight deaths a year are attributed to nitrogen asphyxiation. Our innovations mean the gas tanks can be situated safely outside in the open air.”

The system’s green and money-saving credentials are attributed to what the scientists’ describe as a highly efficient energy recovery process which promises a reduction of up to 50% reduction in liquid nitrogen use compared to conventional equipment.

“Liquid nitrogen is expensive in both cash terms and energy consumption to produce,” added Dr Jouhara. “And quite rightly there are strict health and safety rules because of the attendant dangers of asphyxiation. The Brunel system has no such special requirements.”

Once installed heat pipes are regarded by engineers as a “fit and forget” technology as they have no moving parts and require no routine maintenance.

Dr Jouhara is partnering with industrial gases company Air Products to commercialise the new freezer technology.

The company’s head of cryogenic technology development, Jon Trembley said: “After almost exactly 25 years, Air Products is back at Brunel University conducting leading cryogenic technology research in collaboration with Dr Jouhara. 

“It’s great to be back at Brunel; 25 years ago Air Products European Technology Group was located on campus before out-growing the space and moving out in 1991 to new lab facilities in Basingstoke. Our new research programmes into cryogenically cooled heat pipes is an exciting new development and Brunel’s expertise and excellent capabilities are perfect for our research requirements.”

Initial real world uses are likely to be for medical storage and the team will be working with the NHS Blood and Transplant Service to develop prototype freezers to rapidly cool and store plasma made from donated blood.

“We also see strong demand from facilities which store cord blood or eggs or sperm or other biological materials at very low temperatures,” said Dr Jouhara.

Latest news from the world of air conditioning and refrigeration

UK News

9th December, 2016


Councils ignore prompt payment law

UK: The majority of local authorities in the UK are flouting government prompt payment laws, according to a new report by the Electrical Contractors’ Association (ECA).

7th December, 2016


Honeywell takes retail project award

UK: A cascade refrigeration system twinning CO2 with the HFO refrigerant 1234ze has been named as Retail Energy Project of the Year in last week’s Energy Awards in London.

1st December, 2016


Stonegrove appoints Gowing

UK: Industrial refrigeration contractor Stonegrove Refrigeration has appointed Steve Gowing as design and project engineer.

1st December, 2016


Javac achieves Climate Center double

UK: Javac UK, the refrigerant recovery and vacuum pump supplier, has been named as Climate Centers’ Supplier of the Year for the second year running.

World News

10th December, 2016


Manufacturers appeal antidumping decision

USA: Refrigerant manufacturers have appealed against the US International Trade Commission decision not to apply antidumping duties on imports of HFC components from China.

7th December, 2016


Lack of training threatens phase down

EUROPE: The European Commission has warned that the uptake of training in alternative refrigerants is too low to match the requirements of the F-gas phase down.

6th December, 2016


R12 seized in the South Pacific

SOLOMON ISLANDS: Customs authorities in the Solomon Islands have reported their second seizure of the illegal CFC refrigerant R12 this year. 

5th December, 2016


Bitzer opens subsidiary in Iran

IRAN: German compressor manufacturer Bitzer has established a subsidiary company in Iran.

Leave A Comment