Daikin leads the way to seasonal eďŹƒciency
With European legislation* pressing energy users to drastically cut energy consumption, improve energy eďŹƒciency of buildings and homes, and meet the Commission’s 20/20/20 targets, industry is looking at more appropriate ways to evaluate eďŹƒciency. Thus, the Eco-Design Directive aims at reducing the environmental impact of products in the EU. To that end an implementing measure for air conditioners is under development and it will introduce a new method for performance speciďŹ cations – seasonal eďŹƒciency – in replacement of the current method of nominal eďŹƒciency, which has its limitations. * EPB (Energy Performance of Buildings) Directive 2002/91/EC, ERP - Eco-Design Directive
Temperature distribution curve - cooling Frequency
NOMINAL EFFICIENCY OUTDATED Measuring energy performance is not new to Europe. Such measurements are used to provide consumers with information on air conditioner performance so they can make intelligent choices when purchasing. Present method in place is that of nominal eďŹƒciency, a method, however, with limitations that result in a signiďŹ cant gap between rated and actual performance.
Current point for EER
Outdoor temperature (°CDB)
SEASONAL EFFICIENCY IN LINE WITH REALďšşLIFE PERFORMANCE To correct this situation, a more complex calculation method – seasonal eďŹƒciency – is being developed simultaneously in Eco-Design and prEN 14825 (inquiry version 2010). The major dierences between seasonal and nominal calculation are:
20 30 10
90 100 80
50 60 70 40
CAPACITY
Temperature NOMINAL 1 Temperature condition: 35°C for cooling 7°C for heating Does not often occur in reality
NOMINAL
SEASONAL Several rating temperatures for cooling and heating, reecting actual performance over an entire season
SEASONAL
Does not reect partial capacity
‡ Earliest implementation in 2013
NOMINAL
Integrates operation at partial instead of full capacity
BeneďŹ ts of inverter technology not visible
BeneďŹ ts of inverter technology are shown
Nominal eďŹƒciency gives an indication on how eďŹƒcient an air conditioner operates at a nominal condition. ‡ DeďŹ nes a better representation of eďŹƒciency: seasonal eďŹƒciency
Auxiliary modes
Capacity
Does not take auxiliary power modes into account
SEASONAL Includes consumption auxiliary modes: • • • •
Thermostat o Standby mode OFF mode Crankcase heater
Seasonal eďŹƒciency gives an indication on how eďŹƒcient an air conditioner operates over an entire cooling or heating season.
2013
Today
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> Actively contributes to the development of the Eco-Design methodology for air conditioners by sharing experience and technical knowledge. > First to integrate Eco-Design principle in the light commercial segment by launching Sky AirÂŽ ranges optimized for seasonal eďŹƒciency. > Seasonal smart series already comply with the EU's 2014 Eco-Design requirements. > Daikin oers now a complete light commercial range of products.