RACA Journal August 2023 | Page 53

Products

IMPROVING SUSTAINABILITY WITH AWHP

Air to water heat pump systems , or AWHPs , are efficient systems that provide space and floor heating , as well as cooling , and hot water supply .

LG ’ s THERMA V AWHP is a comprehensive heating , cooling , and hot water solution . It can easily be installed in the home and can replace existing geysers . This is something worth looking into as the THERMA V has been proven to be up to four times more effective than conventional geysers . The AWHP can also function in cold conditions of up to -25 ° C and can heat water to a maximum of 65 ° C .

The system absorbs 75 % of its natural energy from outside air , with the remaining 25 % being provided by electricity . It also reduces CO2 emissions that would ’ ve been present if you had been using an oil or gas geyser .

With smart heating controls , the solution is easy to use and can be set to meet the needs of your lifestyle . Of course , the most effective way to manage your energy consumption is to monitor your power usage regularly to see whether there is room for change and improvement . In turn , you will be able to reduce your energy costs significantly and decrease your CO2 emissions .

For more information , call + 27 ( 0 ) 84 334 4555

BITZER ’ S HIGH-EFFICIENCY VERSION OF CSW COMPACT SCREW COMPRESSORS

CSW motor version 4 is a combination of the well-known BITZER CSW screw compressor with a special selected motor version 4 and special oil charge . This concept has already been successfully implemented for the Chinese market for high reliability and excellent efficiency at water-cooled chiller conditions . Due to increasing efficiency requirements and corresponding customer demand , especially from Europe and India , BITZER now started the manufacture of its CSW for the corresponding markets Ex Works the BITZER Rottenburg- Ergenzingen site .

The number of water-cooled systems is notably increasing in Europe – also due to the requirements of the Ecodesign Directive . CSW enables OEM screw chiller manufacturers to design and produce water-cooled air conditioning chillers that fulfil the highest international energy efficiency standards like the European Ecodesign 2016 / 2281 tier 2 and the Indian BEE-ECBC – ISEER star rating .

NEW POSSIBILITIES FOR CHILLER MANUFACTURERS The product range covers nine models with displacements between 410 m ³/ h and 1,120 m ³/ h at 50Hz as well as 495 m ³/ h and 1,351 m ³/ h at 60 Hz . Their application envelope was designed for highly efficient water-cooled air conditioning and process chiller applications with maximum condensing temperatures up to 46 ° C , which is why their technical concept includes various measures to improve the compressor ’ s efficiency : the motor features increased efficiency in the target application envelope and a reduced maximum operating current . This gives the possibility to use smaller contactors and smaller mains cable diameters , resulting in an overall system cost reduction . CSW was designed for low-pressure medium and low GWP refrigerants like R134a , R1234yf , R513A , R450A , R1234zeE and R515B . Also , the internal gas flow has been optimised and the internal pressure drop further reduced .

For more information , call + 27 ( 0 ) 11 493 6622

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www . refrigerationandaircon . co . za RACA Journal I August 2023 51