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The RPES is calculated as follows.
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To calculate the RPESprimary energy flows (H and J), the efficiencies of the boiler (90%), the power grid (40%) and chiller (300% = 3 EER) are necessary.
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The same comparison is done for the reversible HP.
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The RPES is calculated as follows.
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The same primary energy flows (H and J) are used in this calculation because the reference is the same.
Comfort
To quantify comfort, a class system is introduced. In the figure below, the room temperature is visualised as a purple line and the setpoint is visualised as a green line. The classes are visualised as coloured squares.
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The difference between the configured setpoint and the actual temperature is monitored. The degree of temperature deviation is classified into the four classes. In this case, the high setpoint is 20°C, which means the limits of all the classes are:
Class 1 = [19,21]
Class 2 = [18,19] and [21,22]
Class 3 = [17,18] and [22,23]
Class 4 = [-infinite,17] and [23,infinite]
The limit temperatures always deviate 1°C based on the setpoint. If the user changes the setpoint, the limits change as well.
On every room controller, the amount of time in percentiles is given for every class, as well as the overall comfort class, the main comfort class and the general comfort. The overall comfort class is the worst class with a percentile of more than 1. The main comfort class is the class with the highest percentile. The general comfort means approximately 93.8% of all the people are satisfied with the temperature of the room.
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The calculation of general comfort is based on the Fanger theory for comfort.