The Pareto calculations are divided into the three sections “Energy”, “Comfort” and “Investment”.
Energy
In the “Energy” section the efficiencies are calculated. Any efficiency ratio always has the same principle for calculation. The efficiency is the useful outgoing energy (or power) divided by the ingoing energy (or power). The production efficiency, system efficiency and PER (Primary Energy Ratio) are visualised in the figure below. The yellow arrows represent the primary energy, the red arrows the useful thermal energy, the purple arrow the electricity and the grey arrows the thermal losses.
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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 (based on the ‘Fanger Theory’ for the definition of comfort in a building). 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 user should only activate the economiser in the software if the installed or planned thermostatic room controllers also have an economiser.
Investment
In the section “Investment” the NPV (Net Present Value), the payback and discounted payback, and the IRR (Internal Rate of Return). Because of the abundance of information on the internet about these calculations, it's not described in this Wiki.
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