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MITSUBISHI ELECTRIC’S AIR TO WATER SERIES

Our solution to COOLING’ HEATING and HOT WATER SUPPLY

In the recent years, the need to be more energy conscious and environmentally responsible has become increasingly important to us all.
As a leading manufacturer of air conditioning systems, Mitsubishi Electric constantly strives to meet and exceed the increasing demands placed on the industry.
Through research and development for the future, we proudly introduce our new Air to Water system which uses water as a heating and cooling medium for space heating/ cooling and hot water supply applying the heat pump and heat recovery technology.

Mitsubishi Electric’s Air to Water Series

Accelerating global warming

The increase of the carbon dioxide (CO2) concentration in the earth atmosphere is considered to be one of the main factors concerning global warming. The earth’s average temperature has risen more than 0.8°C over the last century, resulting in extreme weather. It is estimated that the global temperature would rise by 1.1-6.4°C by the year 2100. (Fig.1)

Fig.1 Change in temperature from the year 700 to 2100 (observation and prediction) Source : “The Fourth Assessment Report” published by Intergovernmental Panel on Climate Change (IPCC) from website of Japan Center for Climate Change Actions (http://www.jccca.org/)

Major cause of CO2 emission
  • Fig. 2 shows a breakdown of CO2 emissions in Japan. As the graph shows, industrial, residential, commercial and transportation sectors are the major sources of CO2 emissions.
  • The residential and commercial sectors account for more than 30% of all energy use. With many people spending much of their time indoors at home or work, it is not surprising that buildings account for a large percentage of all energy use. In buildings, especially energy used for air conditioning (cooling and heating) and hot water accounts for large percentage of all energy use.
  • This means that there is a great scope for reducing energy use through better-designed buildings and more efficient heating, cooling and hot water systems.
  • Fig.2 Percentage of energy consumed by each economic sector in Japan Source : "Emissions of Greenhouse Gases in Japan in 2009"
    published by Green house Gas Inventory Office of Japan from website of Japan Center for Climate Change Actions (http://www.jccca.org/)

    Key technologies of Air to Water series

    Air to Water series making the most of Heat Pump and Heat Recovery technology

    Heat pump and heat recovery technologies are already well known in the air conditioning market and proved to be efficient for cooling and heating. Mitsubishi Electric has now designed Air to Water (ATW) series utilizing the technologies to provide hot water.
    Here is an overview of the technology that roots in ATW system

    Basics of air conditioning HEAT PUMP

  • Remarkable energy consumption efficiency
  • Generating much larger heat energy than the input energy
  • Heating or cooling operation
  • From energy output side, the operation characteristics of a heat pump are different to conventional systems (such as electric/gas/oil boilers or electric heaters). With conventional systems, 1kW of input energy provides less than 1kW of output energy or heat. With a heat pump system, every 1kW of input energy is converted into an average of 2~5times of output energy or heat by absorbing heat from outdoor air. Also, a heat pump, as its name shows, “pumps up” heat from a low temperature source, outdoor air, for example, and transfers it at a higher temperature in a building, making it more efficient as conventional boilers and a natural choice for low cost heating and hot water.

    HEAT RECOVERY

  • Effective use of waste heat

  • Heating and cooling simultaneous operation
  • Heat recovery system can provide an ideal solution when taking a look at the system from energy exhaust point of view. This is because air conditioning and hot water are expected to use throughout the year and with a heat recovery system, exhausted heat from the indoor unit is diverted to be reused in a different purpose. For example, wasted heat from cooling operation is reused for heating or hot water supply, and wasted heat from heating operation or hot water supply is reused for cooling operation or cold water supply. The more frequently heating and cooling simultaneous operation is carried out, the higher the energy saving effect becomes.t energy or heat by absorbing heat from outdoor air. Also, a heat pump, as its name shows, “pumps up” heat from a low temperature source, outdoor air, for example, and transfers it at a higher temperature in a building, making it more efficient as conventional boilers and a natural choice for low cost heating and hot water.

    Heat recovery system can provide an ideal solution when taking a look at the system from energy exhaust point of view. This is because air conditioning and hot water are expected to use throughout the year and with a heat recovery system, exhausted heat from the indoor unit is diverted to be reused in a different purpose. For example, wasted heat from cooling operation is reused for heating or hot water supply, and wasted heat from heating operation or hot water supply is reused for cooling operation or cold water supply. The more frequently heating and cooling simultaneous operation is carried out, the higher the energy saving effect becomes.t energy or heat by absorbing heat from outdoor air. Also, a heat pump, as its name shows, “pumps up” heat from a low temperature source, outdoor air, for example, and transfers it at a higher temperature in a building, making it more efficient as conventional boilers and a natural choice for low cost heating and hot water.

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