Air-to-water Heat Pump Systems Split type Time to change to smart heating… Starting living a better life with ecodan Keep on evolving! Auto Adaptation Eco Changes is the Mitsubishi Electric Group’s environmental statement, and expresses the Group’s stance on environmental management. Through a wide range of businesses, we are helping contribute to the realization of a sustainable society. Revised publication, effective Feb. 2013. Superseding publication of L-179-1-C9105-A Dec. 2012. L-179-1-C9105-B SI-1302 Printed in Japan (MDOC) Specifications are subject to change without notice.
Using ecodan can heat rooms and supply domestic hot water, realising greater comfort and energy sa ving. “ecodan” – Economic, eco conscious next generation heating system Both energy-saving and safe for the environment, the Mitsubishi Electric ecodan incorporates a highly efficient heat pump system that utilises electricity to capture “the heat in the air”, a renewable energy resource. Equipped with advanced inverter control, meticulous temperature control assures comfortable heating, and its space-saving “All-in-one” indoor unit is easy to install. These energy-saving, high comfort and simple installation characteristics have drawn the ecodan heating system into the spotlight centre stage. Excellent ecodan’s heating performance, even at low outdoor temperature! The secret behind our impressive heat pump efficiency is capturing the heat in the air. Heat pump systems are now capturing attention. With this 1kW Electrical energy input Refrigerant compressed to raise the temperature technology, atmospheric heat is harnessed; that is, it is collected from the air and used as a heat source to provide highly efficient Compressor heating. For example, a heat pump with a coefficient of perfor- Produces 4 times the amount of energy input mance (COP) of 4.0 uses 1kW of electrical energy input and 3kW of heat energy transferred from outside-air to the heat pump for 1 kW 3 kW 4 kW an impressive final heat output of 4kW. Heat absorbed Water heat Water heat from the air Evaporator Evaporator exchanger exchanger Expansion valve Heat Electrical energy input Heat absorbed from the air Heat outlet 3kW Air-to-water heat pump principle (when heating) Refrigerant and heat circulation 4kW Expansion valve expands Hot-water outlet < Case of COP 4.0 > refrigerant to lower the temperature 1 2
Auto Adaptation Two zone control Settings can be Settings can be performed using performed using ecodan – Maximize energy savings while keeping comfort at all times Simultaneously making two different temperature zones an SD card. an SD card. assures more comfortable, highly convenient heating Heat curve setting (Example) Aiming to realise further comfort and energy savings, Mitsubishi Electric is proud to introduce a revolutionary new system control. ecodan makes it possible to set two temperatures which are used in two different types heat emitters in a system. The system allows adjustment This is based on data indicating that a 1°C drop in the flow Flow temp. of temperatures when different room temperatures are required, such as a temperature of 40°C for the living room radiator and temperature of temperature improves the coefficient of performance (COP) of the 30°C for floor heating. Additionally, the scheduling for each zone can be set separately by main controller. ATW system by 2%. This means that energy savings are dramatically If flow 60ºC temperature is COP is lowered 1°C improved 2% affected by controlling the flow temperature in the system. Two temperature zones In conventional system control, the flow temperature is determined 40°C based on the preset heat curve depending on the actual outdoor 30ºC Radiator Hydro box temperature. However, this requires a complicated setting to Pump Mixing control Outdoor temp. achieve the optimal heat curve. -15ºC 10ºC Flow switch Mixing FTC* valve Mitsubishi Electric’s Auto Adaptation function automatically tracks changes of the actual room temperatures Pump 30°C and outdoor temperatures and adjusts the flow temperature accordingly. Our more evolutionary Auto Adaptation function measures the room temperature and outdoor temperature, and then calculates the Mixing tank Flow switch Underfloor heating required heating capacity for the room. Simply stated, the flow temperature is automatically controlled according to the required *FTC = Flow temperature controller *Items such as mixing tank, mixing valve, flow switch and pumps are not included and need to be purchased locally. heating capacity, while optimal room temperature is maintained at all times, ensuring the appropriate heating capacity and preventing energy from being wasted. Furthermore, by estimating future changes in room temperature, the system works to prevent unnecessary increases and decreases in the flow temperature. Accordingly, Auto Adaptation maximises both comfort and energy savings without Intelligent boiler interlock the need for complicated settings. Future room temperature estimation Settings can be performed using Room temp. No need to replace existing boiler! an SD card. (a) Higher than the target room temp. lower the flow temp. Automatic switchover enables even more efficient operation (b) Approximately same as the target temp. keep the flow temp. Target temp. (c) Lower than the target room temp. raise the flow temp. The flexibility of ecodan’s intelligent control allows the system to be combined with boiler currently in use. Additionally, this control can judge Modify the flow temperature by comparing which heating source (ecodan, or boiler) to be operated according to situations. actual and estimated room temperature. Customers using a boiler can receive the energy-saving performance of ecodan. Future 3 points T0 T1 Current Time Intelligent system combining a boiler with ecodan Auto Adaptation – room temperature control Intelligent boiler interlock system Room temperature [Example] Hydro box wireless remote controller (option) 1) Installation site: South of Sweden a) Outdoor temperature is gradually decreasing… 0 2) Detached house with underfloor heating FTC *Thermostat (field supply) also can be used. -5 3) Data in February 2011 -10 °C Electricity -10 -6 °C Radiator Radiator -15 Turning boiler on/off 0:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 Pump according to operational conditions. b) Target flow temperature Target flow temp. is Target flow temp. goes up 36.6 °C 40 Other source gradually lowered. following the heat curve. Mixing tank (Gas, Oil, etc) 35 34.6 °C 30 Boiler *Items such as mixing tank, and pump are not included and need to be purchased locally. at A-6 °C 30.0 °C 25 at A-10 °C 0:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 Heat source switchover - Choose appropriate systems based on needs By Auto Adaptation, flow temperature can be lowered even when outdoor temp. 4 types of heat source switchover logic is decreasing. Switchover based on actual outdoor temperature c) Room temperature Repeats thermo ON/OFF Room temp. can be kept stable Heat source switchover occurs when the outdoor temperature drops to a preset temperature. and room temp. becomes unstable. and stays at the targeted level at the end. 23 Actual with Auto Adaptation Switchover based on running cost 22 21 Heat source switchover occurs by judging optimal operation based on running cost. 20 *Pre registration of energy price of electricity, and gas or oil per 1kWh are necessary. 19 0:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 Switchover based on CO 2 emission level Heat source switchover occurs to minimize CO 2 emission. By Auto Adaptation, flow temperature can be lowered without sacrificing comfort. *Pre registration of CO 2 emission amount from electricity, and gas or oil are necessary. Actual outdoor temperature Switchover can also be activated via external input. Estimation based on a heat curve (reference) Actual with Auto Adaptation For example, peak cut signal from electric power company. Target room temperature 3 4
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