3 Evaporator Water heat exchanger Evaporator Water heat exchanger Expansion valve Compressor Heat Hot-water outlet Expansion valve expands refrigerant to lower the temperature Refrigerant compressed to raise the temperature Heat absorbed from the air 4kW 3kW Electrical energy input 1kW Air-to-water heat pump principle （when heating） Refrigerant and heat circulation 〈Case of COP 4.0〉 Produces 4 times the amount of energy input 1kW Electrical Energy input 3kW Heat absorbed from the Air 4kW Heat outlet ＋ ＝ On average, domestic hot water accounts for over 36%*1 of the overall energy bill in New Zealand homes. Domestic hot water heating is therefore an obvious area to target in reducing energy bills. This is especially pertinent during the winter months, where a combination of taking longer, hotter showers and the increased need for a warm and dry home, typically drives up power bills. An Ecodan CO2 Hot Water Heat Pump System can help reduce hot water bills when compared to gas and direct electric systems. What is an Ecodan CO2 Hot Water Heat Pump? The Ecodan CO2 Heat Pump is an advanced heat pump system that can either combine the hot water heating supply and room heating for a small apartment, or provide the complete hot water heating requirements for a typical 4 person household. Why CO2? CO2 is used as the refrigerant in this product because it is a naturally occurring gas. Recent technical advances in heat pump technology have allowed us to harness this gas which would have no adverse effect on the environment should it ever leak into the atmosphere, unlike other refrigerants which have the potential to add to global warming in the unlikely event that they ever leak. CO2 (R744) is a safe, naturally occurring (0.04%) of atmosphere, non-flammable and stable refrigerant fluid solution. It is non-toxic (at reasonable concentrations) and with a Global Warming Potential (GWP) number of 1, it is also the base refrigerant that all other refrigerants GWP numbers are based on. Mitsubishi Electric has utilised their expertise and industry-leading technology to develop Ecodan CO2 Hot Water Heat Pumps. The system has been specifically designed to provide all the super energy efficient hot water heating requirements for a household of up to 4 people, or alternatively can also be used to provide both space heating for a small one bedroom apartment as well as covering its hot water requirements at the same time. Ecodan CO2 Advanced Hot Water Heat Pumps Super-Efficient Next Generation Technology COP Comparison Chart Electric Heating Ecodan Gas Heating (Non-Condensing) 0.82 0.99 4.00 What is a Hot Water Heat Pump Heat pumps use electrical energy and take low grade heat energy from the outdoor air to heat refrigerant which in turn heats water for domestic use and space heating. The efficiency of a heat pump is known as the Coefficient of Performance or COP. This is a ratio of the heat delivered to power consumed. For every 1kW of electrical input energy, Ecodan absorbs renewable heat energy from the outdoor air to provide the home with over 4kW*2 of heat output. Compared to typical gas and direct electric heating systems that can have higher running costs with COPs as low as 0.82*3, Ecodan provides an energy efficient alternative. *1 Based on data sourced from NZGBC. *2 The overall system efficiency and energy savings will depend on the comparison with your current heating system, satisfactory system design and installation, and operational settings i.e. how you use the heating system. *3 Based on manufacturer information for gas instant hot water heater (non-condensing).. 2
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