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  5. Increasing Air Conditioner Efficiency

Response to Climate Change

Increasing Air Conditioner Efficiency

Response to Climate Change


As a manufacturer of air conditioners doing business globally, Daikin makes it its mission to reduce energy consumption in order to improve people's comfort and contribute to reducing global warming. To this end, we conduct quantitative environmental assessments for each product life cycle in order to develop products and services that use minimal electricity and to combine these in order to optimize the overall energy consumption of buildings.

Life Cycle Assessment

Focusing on Increasing Energy Efficiency and Reducing Refrigerant Impact during Product Use

We assess global warming impact of air conditioners using the life cycle assessment (LCA) method, which allows us to determine the environmental impact at each stage of a product's life cycle.

In the life cycle of an air conditioner, the majority of the greenhouse gas that is emitted occurs during product use stage, and refrigerants also represent a large impact. That is why we focus on reducing the impact of these two. In addition to incorporating inverter technology to reduce power consumption, we employ R-32, a refrigerant with low global warming potential, to achieve greater energy efficiency. In fiscal 2019, we reduced CO2 emissions from residential air conditioners by about 21% and from commercial air conditioners by about 26% compared to life cycle CO2 emissions 10 years earlier.

Sample of LCA: Comparison of CO2 Emissions over Product Lifecycle*1

Sample of LCA: Comparison of CO2 Emissions over Product Lifecycle
*1
Based on Daikin standards for 2.8-kW class residential air conditioners and 14-kW class commercial air conditioners.
*2
The seasonal power consumption is calculated in accordance with the standard of the Japanese Industrial Standards (JIS) for residential air conditioners and the Japan Refrigeration and Air Conditioning Industries Association for commercial air conditioners.
*3
Refrigerant impact is calculated by obtaining the global warming potential per unit of weight, while factoring in the average leakage rate during the product use, disposal, and recycling stages.

Improving Energy Efficiency of Air Conditioners

Improving Annual Performance Factor (APF)*1 and Integrated Part Load Value (IPLV)*2

In the life cycle of an air conditioner, from design and manufacture to use and disposal, the majority of the CO2 that is emitted occurs during product use. That is why when we revised our voluntary environmental standards, we tightened our criteria for energy efficiency in the product use stage in order to improve the energy efficiency of products.

*1
Annual performance factor (APF): The APF represents heating and cooling capacity per kWh over one year of use of an air conditioner under specific conditions. The higher the APF, the greater an air conditioner's energy efficiency.
*2
Integrated part load value (IPLV): The IPLV is an energy efficiency indicator obtained by calculating the weighted average of cooling COPs at four different capacities of machine operation. It corresponds to the APF of a packaged air conditioner. In reality, air conditioners often operate at partial capacity. The higher the IPLV, the greater the actual energy efficiency of a product.

Electricity Consumption and Energy Consumption Efficiency (residential air conditioners)*1

Electricity Consumption and Energy Consumption Efficiency (residential air conditioners)
*1
Calculated for Daikin 2.8-kW class air conditioners. Under JIS conditions.
*2
For products with prescribed measurements
*3
Measures were based on the JIS C 9612:2005 standard up to fiscal 2012; from fiscal 2013 they are based on JIS C 9612: 2013.

Electricity Consumption and Energy Consumption Efficiency (commercial air conditioners)*

Electricity Consumption and Energy Consumption Efficiency (commercial air conditioners)
*
Calculated for Daikin 14.0-kW class air conditioners. Under conditions of the Japan Refrigeration and Air Conditioning Industry Association, and the Japanese Industrial Standards (JIS).

Developing Energy-Efficient Products

Released New Product with Greater Energy Efficiency Performance in the SkyAir Series

In April 2020, we released an 8hp/10hp class EcoZEAS air conditioner with greater energy efficiency performance under the SkyAir series of air conditioners for shops and small offices.

The model uses R-32 refrigerant with low global warming potential and also reduces the amount of refrigerant it uses. In addition, it features a high efficiency swing inverter compressor that reduces energy consumption during operation, improving APF by 17% compared to existing models.

Additionally, the BS unit for VRV models for North America switches from a parallel type to a direct type. This helps to reduce CO2 emissions across the entire life cycle of air conditioning system, rather than just the individual unit.

Released Multi-Split Type Air Conditioner for Commercial Buildings with Industry-leading Energy Efficiency Performance

The new VRV6, a multi-split type air conditioner for commercial building released in July 2018, uses a complete micro channel heat exchanger to achieve industry-leading energy efficiency performance*.

In August 2018, we released the GREEN Multi-Split which is the first air conditioner for commercial buildings in the industry to adopt R-32 refrigerant with a low global warming potential. The global warming potential (GWP) of R-32 is lower than the conventional R-410A, which offers excellent energy efficiency and reduced refrigerant quantity. This product's GWP multiplied by refrigerant quantity is around 79% lower than the average for equipment using R-410A from 2011 to 2013. This amount achieves the Kigali Amendment target for 2029.

*
Daikin research as of July 2018.

Retrofit System Maintenance Service Makes Existing VRV Multi-Split Type Air Conditioners for Commercial Buildings More Energy Efficient

Improving the energy efficiency of existing VRV multi-split type air conditioners for commercial buildings is an important part of reducing energy consumption. That's why we introduced Daikin's Retrofit System, a new maintenance service that boosts the energy efficiency of currently installed equipment. Using technology for replacing parts in the control panel, the air conditioner's brain, and the compressor, the machine's heart, the Retrofit System reduces power consumption by 15% a year.
The Retrofit System also contributes to saving limited resources such as steel, copper, and resin, because the replacement parts used with the system weigh less than one-third those normally used in upgrading VRV multi-split type air conditioners for commercial buildings.

These benefits earned the Retrofit System the Minister's Prize, the Ministry of Economy, Trade and Industry in the product and business model category of the 2016 Energy Conservation Grand Prize.

Products for Detached Homes Added to DESICA Series

Requiring no water drainage or supply pipes, DESICA instead uses outside air to control humidity, either humidifying or dehumidifying. Equipped with the Hybrid DESICA Element, which contains both highly efficient water absorption material and a heat exchanger, it consumes just one-sixth the energy of conventional humidity controlling devices (according to Daikin tests).

For this, In June 2011 Daikin received the Invention Award from the Minister of Economy, Trade and Industry at the National Commendation for Invention, sponsored by the Japan Institute of Invention and Innovation.

In autumn 2012, Daikin Industries, Ltd. released the DESICA HOME AIR for detached homes, which controls humidity and ventilation throughout the entire house. Just one unit offers round-the-clock, year-round comfort control for all rooms in homes with floor space of between 120 m2 and 200 m2. Like the commercial DESICA, this product gives humidifying and dehumidifying without the need for water drainage or supply pipes. Because it is floor standing, maintenance such as replacement and cleaning of the high-performance filter is easy. With its ability to provide high-quality air and energy efficiency, the DESICA HOME AIR has already proved a hit in many homes.

DESICA HOME AIR

Customers achieve the best balance of temperature and humidity by choosing a product and combination of parts from the extensive lineup.

Suggestion for Combining All-Room Air Conditioning with DESICA

Suggestion for Combining Individual Air Conditioners with DESICA

Daikin World's First to Launch R-32 Refrigerant Model of HEXAGON Force Air-Cooled Heat-Pump Modular Chiller

Air conditioning heat source equipment energy consumption differs significantly between times when loads are heavy, such as midsummer and midwinter, and lighter load operations accounting for approximately 90% of the year. To conserve energy, efficient operation is important regardless of whether the load is heavy or light.

HEXAGON Force achieves operational efficiency throughout the year due to a high-efficiency scroll compressor that efficiently pressurizes refrigerant to control energy and a proprietary F-shaped heat exchanger configuration.

In fiscal 2018, Daikin became the world's first company to launch models using the R-32 refrigerant. This has reduced the environmental impact of the refrigerant.

HEXAGON Force

HEXAGON Force

TOPICS

Urusara XA Series and DX Series Energy Efficient Residential Air Conditioners Honored with Energy Conservation Grand Prize

The Urusara XA Series and DX Series of energy efficient residential air conditioners released in November 2019 were awarded the Chairman Prize of Energy Conservation Center, Japan, in the Products and Business Model Category of the fiscal 2019 Energy Conservation Grand Prize.

In the recently increasing number of energy efficient homes with large amounts of insulation, a reduced burden is placed on air conditioners because of these homes are less susceptible to the effects of outside air temperature, which makes the compressors operate at low speeds for longer hours. The air conditioners that were awarded on this occasion feature a proprietary compressor that is highly efficient even at low speed operation. They reduce primary energy consumption by as much as 13%. Energy efficient homes have faced the challenge of being too cold during the summer because of excessive air conditioning and the feeling of cold air being released during heating in the winter. These issues have been resolved with evolved dehumidification and air flow control functions.

Urusara X

Urusara X

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