A business unit of United Technologies Corp., Carrier Corp., is offering its 3,000 refrigeration tonne (RT) Evergreen® 19XRD dual-compressor centrifugal chiller that represents cutting-edge heating, ventilation and air-conditioning (HVAC) industry technology. This is Carrier’s largest singleunit cooling capacity chiller employing non-ozonedepleting refrigerant HFC-134a to be manufactured
in Shanghai, China. Carrier’s Global Research and Development Centre in Shanghai developed and engineered the new chiller for large airports, shopping malls, commercial complexes, factories and district cooling plants. Carrier will manufacture the Evergreen 19XRD in China for both the local and global market.

The chiller contains Carrier-patented technology that is designed to improve indoor air quality and provide environmental benefits. It has obtained certification as an energy-saving product from China Standard Certification Centre. The dualcompressor and large cooling capacity chiller achieves up to 7 per cent improvement in integrated
part-load efficiency. In a large commercial building that requires 12,000 RT cooling capacity and operates 180 days per year, the chiller can reduce annual electricity usage by approximately 400,000 kWh, the total electricity consumption of 222 Shanghai families.

Source: www.webwire.com

In the United States, a Kaneohe auto mechanic may be on the verge of gaining  environmental Protection Agency approval for a new refrigerant that can help reduce carbon emissions. According to Mr. Richard Maruya, his HCR188c hydrocarbon blend is designed to replace current refrigerants in air-conditioners, refrigerators and freezers. The EPA has not approved Mr. Maruya’s creation yet, but the agency’s regional office last week honoured him with a 2008 Environmental Award.

Source: www.kpua.net

Coolmation, an exclusive distributor for the Rhoss range of chillers in the United Kingdom, has launched the new Micro Powercool series of industrial low-energy air-cooled chillers with a three-year warranty. Developed specifically for industrial and process cooling applications, the Micro Powercool series is available in cooling capacities from 15 kW to 70 kW. A breakthrough in low energy, environmentally friendly cooling, Micro Powercool chillers are designed by Rhoss to provide the best energy efficiency ratio (EER) performance in their range. They come with a three-year warranty.

In addition, Micro Powercool is the first industrial chiller to use the green energy-efficient refrigerant R-410a with scroll compressors. Comprising nine chillers, the Rhoss Micro Powercool series is Eurovent-approved and designed to run on the efficient, ozone-safe R-410a refrigerant charge. The three largest units of this unique breed of chillers have two scroll compressors of different capacity installed in the same refrigerant circuit to provide three cooling capacity steps and further increase the chiller efficiency. Coupled with R-410a, one of the new refrigerants developed to replace R-22 now rapidly being phased out, this new range operates at a significantly higher energy efficiency ratio than previous chillers. Micro Powercool chillers, featuring a unique patented control system called Adaptive Function Plus, offer energy efficient compressor operation and highly precise temperature stability. Contact: Coolmation, Unit 7, Millstream Industrial Estate, Ringwood, BH24 3SD, United Kingdom. Tel: +44 (1425) 478 971.

Source: www.processingtalk.com

Researchers at the University de Oriente-Santiago, Cuba, developed LB-12 more than a decade ago. LB-12 – a refrigerant gas comprising the hydrocarbons propane, isobutane and n-butane – does not affect ozone and can be used to substitute CFCs, particularly CFC-12 (CCl2F2). Using LB- 12 as a refrigerant is more energy-efficient than using CFCs. A refinery in Santiago de Cuba has been producing small amounts of the hydrocarbon mixture since 1994. Cuba converted about 500,000 refrigerators from using CFC-12 to LB-12.

A Canadian firm, Refrigerant Services Inc. (RSI), has now developed and patented a separation technology capable of producing high-purity LB- 12. RSI’s patented fractional distillation, multipass batch process is capable of separating the LB-12 mixture to purity levels exceeding 99.5 per cent and demonstrates Canadian expertise in an application of hydrocarbon distillation. The project also demonstrates that developing countries can phase out the production and consumption of ozone-depleting substances as stipulated in the Montreal Protocol and reduce GHG emissions through gains in energy efficiency. Contact: Mr. Jim Thomas, Refrigerant Services Inc., 105 Akerley Blvd., Unit D, Dartmouth, Nova Scotia B3B 1R7, Canada. Tel: +1 (902) 4684 997; Fax: +1 (902) 4685 102; E-mail: jthomas@rscool.com/ info@rscool.com; Website: www.rscool.com.

Source: www.team.gc.ca

Konvenkta, a leading German manufacturer of integrated thermal systems for commercial vehicles has added a bus air-conditioning unit to its R744 products. Winner of last year’s prestigious German Environmental Award, Konvekta was the world’s first to successfully install R-744 vehicle air-conditioning. Some of the salient features of Konvekta’s CO2 bus air-conditioning are cooling capacity of 28,400 kcal/h, evaporator air capacity of 6.480m3/h and current consumption at 104 A at 26 V. The unit measures (length/width/height) 2,680/2,100/220 mm.

Source: www.r744.com

The German manufacturer Bock has added to its products range four compressor models for CO2 cascade refrigeration systems. The company’s robust, semi-hermetic models offer lower energy consumption in commercial and industrial refrigeration applications. The piston compressor range that Bock has developed, based on its current semi-hermetic product range and building on extensive experience in the transport sector, fits all CO2 (R-744) applications of up to 40 bar in supermarket and industrial refrigeration. Bock’s new compressors permit the greatest possible level of operational safety and an economic spare part storage through adjustments to the existing technology and an extensive use of tried-and-trusted standard parts. Their solid construction with lowfriction sleeve bearings, aluminium piston with two ring assembly and high-resistance piston bolt bearings ensure a wear-resistant, durable driving gear, which leads to substantial life cycle cost reductions. Also, a valve plate construction using impact-resistant spring steel parts, tested thoroughly all over the world, enables safe operation of the compressors.

Source: www.r744.com

E.I. Du Pont de Nemours & Co., the United States, has patented a process for producing 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene. The process involves pyrolysing 1,1,1,2,3-pentafluoropropane. The invention pertains to the production of tetrafluoropropenes: more specifically to the production of 2,3,3,3-tetrafluoropropene (HFC- 1234yf) and of 1,3,3,3-tetrafluoropropene (HFC- 1234ze) from 1,1,1,2,3-pentafluoropropane (HFC- 245eb).

Both HFC-1234yf and HFC-1234ze, having zero ozone depletion and low global warming potential, have been classified as potential refrigerants. Another United States patent discloses the separate production of HFC-1234ze (mixture of E- and Z-isomers) by a catalytic vapour-phase dehydrofluorination of CF3CH2CHF2 and of HFC-1234yf by a catalytic vapour-phase dehydrofluorination of CF3CF2CH3.

The pyrolysis of HFC-245eb to HFC-1234yf and HFC-1234ze and HF is carried out without any catalyst, in a substantially empty reactor. Through proper selection of operating conditions, such as temperature and chemicals contact time, the process may be operated to produce predominantly mixtures of HFC-1234yf and HFC-1234ze from HFC-245eb. The reaction is preferably conducted at sub-atmospheric or atmospheric total pressure. The reaction can be beneficially run under reduced total pressure (i.e., total pressure less than one atmosphere). However, near atmospheric total pressure is preferred. Contact: E.I. Du Pont de Nemours & Co., 1007 Market Street, Wilmington, Delaware 19898, United States of America.



Source: www.freepatentsonline.com