Awards to Sanyo & Daikin
Sanyo presented its innovative new Heat Pump able to operate efficiently under extremely low ambient temperature conditions (-20 degrees Celsius), being thus suitable for cold areas such as the Hokkaido region in north Japan. The unit, developed in co-operation with the Hokkaido Electric Power company, won the Chairman Prize of the Energy Conservation Centre of Japan (ECCJ), under the category of Low Ambient Multifunction EcoCute.
Sanyos new CO2 Heat Pump uses a split cycle system allowing to increase by 50% the heating capacity and by 20% the Coefficient of Performance (COP) at -20° C ambient temperature, when compared to a conventional cycle of a Sanyo model.
Daikin, on the other hand, also won the Chairman Prize of ECCJ for its CO2 Heat Pump. With a COP of 5.1, its latest EcoCute unit uses a special water/CO2 Heat Exchanger.
Trend towards increasing efficiency
The exhibition showed a trend towards high efficient Heat Pumps, with the majority of new models presenting a COP of over 5.0. This means a significant increase since the launch of EcoCute in 2001, where best models offered a maximum COP of 3.5. Sizes of EcoCute units have also decreased to fit smaller spaces, and new models have been developed to suit various needs (i.e. large integrated systems, industrial installations, extreme weather conditions, etc.).
Companies showcasing new models included:
- Chofu: its new Ecocute Heat Pump reaches a COP of 5.1, combined with a silent operation, with maximum operating noise of only 38dB.
- Corona: with similar efficiency, it offers an attractive slim design to fit in residential dwellings.
- Panasonic (National): last years winner of the ECCJ award showcased a new model using a vacuum insulation panel, with overall improved efficiency.
- Hitachi (see picture in image gallery)
The ENergy & ENvironment Exhibition (ENEX) displayed from 30 January to 1 February in Tokyo technical innovations contributing to efficient and environmental solutions for the automotive and stationary sectors. The event is organized every year by The Energy Conservation Center of Japan (ECCJ), with the support of the Japanese Ministry of Economy, Trade and Industry (METI). After the showcase in Tokyo, ENEX will also take place in Osaka from 21 to 23 February.
"Eco Cute" is the commercial name of heat pump water heaters in Japan, using the natural refrigerant CO2 (R744). Since its entry into the market in 2001, over 1 million EcoCute units have been sold in the country.