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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 the HFC-32 low-global-warming refrigerant to achieve greater energy efficiency. In fiscal 2017, we reduced CO2 emissions from residential air conditioners by 22% and from commercial air conditioners by 32% compared to lifecycle 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

*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

Launched machi Multi, multi-split type air conditioners for stores and offices enabling energy saving in small buildings.

In urban areas where small buildings are densely packed in together it is difficult to find space for installing conventional outdoor multi-split type air conditioners for commercial buildings. In many cases, several small outdoor units are installed. As a result, many outdoor units line buildings and building walls, making maintenance work difficult.

The machi Multi, launched in April 2017, reduces the space needed for installation up to approximately 58% compared to conventional multi-split type air conditioners for commercial buildings due to its smaller size for an outdoor unit. Even in urban areas with many small buildings, multi-split type air conditioners for commercial buildings can be operated individually enabling energy savings.

machi Multi

Sales Launch of cocotas Multi-Cassette-Type Air Conditioners Ideal for Small Spaces

Daikin newly developed the cocotas multi-cassette-type air conditioner for smaller spaces such as washrooms, kitchens and other non-living spaces for which conventional small capacity 2.2 kW air conditioners had been too powerful to be practical. With a 0.8 kW cooling capacity and a 1.0 kW heating capacity, this is the industry's smallest size air conditioner, ideal for spaces equivalent to the size of 2–3 tatami mats.

In addition to the combination of Daikin's proprietary inverter control and low-speed, high-efficiency swing pressure unit, the adoption of a new motorized valve able to control low flow rate refrigerant that limits capacity to as low as 0.2 kW enables finely-tuned operation and comfortable temperature control. This unit is equipped with "modulated operation" in response to the need to leave air conditioning on when no one is in the room, such as washrooms, which experience frequent in and out traffic in the mornings, and hallways outside bedrooms at nighttime. Modulated target temperature operation maintains temperature differences between living spaces and non-living spaces within a range that does not place a burden on the human body while keeping energy costs low, eliminating extreme temperature differences in the home and contributing to energy savings.

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

TOPICS

HEXAGON Force Air-Cooled Heat-Pump Modular Chiller Awarded the Chairman Prize of Energy Conservation Center, Japan (ECCJ) in the 2017 Energy Conservation Grand Prize

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.

Further, the use of IoT-compatible cloud services enables more detailed energy management. This results in the realization of more efficient air conditioner operation and longer life, contributing to lower air conditioner lifecycle costs for large facilities that are on the rise mainly in the Tokyo metropolitan area.

HEXAGON Force

Business Model Promoting Energy Conservation through Replacement of Installed Equipment Heat Source Awarded the Chairman Prize of Energy Conservation Center, Japan (ECCJ) in the 2017 Energy Conservation Grand Prize

The VRV Q Series for replacement use is a product equipped with the latest energy saving technologies that replaces outdoor units while leaving indoor units, refrigerant pipes and wiring as is. By eliminating the required expenses and indoor construction work that had been an issue when replacing heat-pump commercial air-conditioning equipment multi-split type air-conditioning systems for buildings and ECOCUTE heat-pump water heaters, the time required for construction work is shortened and approximately 25% less energy is consumed. This removes the burden from users and has gained a strong reputation as a new replacement business achieving energy saving easily using existing equipment.

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