Coexistence of Project and Environment by “Energy-saving” and “Heat pumps”

Coexistence of Project and Environment by “Energy-saving” and “Heat pumps” 

Satoru FUJIMOTO, General Manager
CSR & Global Environment Center
DAIKIN industries, Ltd

Response to global environmental issues takes first priority for DAIKIN Industries, Ltd. and Daiken addresses them in every way possible. Among consumer products, Air conditioners consume the most energy after automobiles. Because of this, attention is drawn to their influence on global warming. Therefore, Daikin tackles global environmental issues directly and aims at business expansion and our contribution to society. Daikin considers that creating and providing products and services that can minimize environmental impact by technology development such as the inverter and heat pump technologies is our vocation as an enterprise.

1. Heat Pump Technology
Heat Pump Technology is efficient at reducing CO2 emissions. Combustion systems using coal, petroleum or natural gas are mostly employed for heating and hot water supply. CO2 emissions from these systems are massive and they account for approximately 30% of emissions worldwide. In Europe more than 70% of energy consumed at home is used for heating and hot water supply. On the other hand, heat pump technology pumps heat extracted from the outside air indoors, so that it heats more efficiently and emits half as much CO2 as conventional combustion heating. In the future, heat pumps would be further improved as new energies spread. The IEA (International Energy Agency) estimated that the total amount of CO2 emissions could be decreased by more than 6% if heat pumps are used for heating and hot water supply around the world. This is equivalent to planting trees on a land area thirteen times as large as Japan.
The Heat Pump Space Heating System (Fig. 1) that we sell in Europe is valued because of its “earth-friendly” properties and has brought about a big success. In Japan, the water heater brand named ”Eco-cute" that employs heat pump technology is widely used in homes. Many countries are encouraged to use heat pumps as a way to reduce CO2 emissions.


Fig. 1  Example of Our Heat Pump Space Heating System


2. Inverter Technology
Sales of air conditioners have been increasing globally, especially in China and India whose economies are growing remarkably and in Europe where many people died of heat stroke during a heat wave. The widespread use of air conditioners has resulted in the increase in power consumption and CO2 emissions. Inverter Technology is an important way to reduce our impact on the environment and Japan is proud to introduce it to the world (Fig. 2). Inverter Technology can fine-tune its control by adjusting the number of rotations of the air-conditioning equipment. Room air conditioners in Japan have reduced energy consumption by 40% from ten years ago on average by using the inverter technology. Additionally, our product called “Airnet” can prevent unnecessary energy use by integrating this inverter and a remote monitor using IT technology and save more than 10%.
In the future, the need for comfort will increase especially in developing nations. Daikin has to meet the needs as a manufacturer and would like to spread energy-saving products using the inverter technology around the world.


Fig. 2  Energy-saving Produced by Inverter Technology


3. Other Technology
Daikin also provides many other environmental products including heat-shielding paint that can control absorption of heat under the scorching sun by taking advantage of the properties of fluorine chemistry. This reduces air-conditioning load in buildings by more than 10%. Also, they have a special tube that can prevent slight-leakage of petrol from the tube and hybrid hydraulic equipment that has achieved 95% energy saving by integrating electricity with the property of hydraulic pressure.

Refrigerant that is used for air-conditioning equipment has a high global warming potential and an influence on global warming equivalent to approximately two-tons of CO2 when it is vented to the atmosphere. Daikin is committed to recover and deal with it. In 2008, since the Daikin’s efforts were evaluated, Daikin received the “Minister Prize of METI”, which is the top prize of the “Ozone Layer Protection and Global Warming Prevention Award” presented by the Nikkan Kogyo Shimbun Ltd. Daikin will keep up efforts to reduce refrigerant emissions and in the future Daikin will also advance the development of both natural and new refrigerants that not only are recovered but are also drastically less harmful to the environment

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