The work is devoted to the calculation of the specific humidity concentration course during the day in the pool hall. Different humidity concentration waveforms are considered based on various optional input parameters. For example, the geometry of the room, the number and dimensions of windows, the maximum exterior and interior temperature during the day with allowed amplitudes of temperature fluctuations, wind speed, mass of pollutants, etc. enter into the calculations. Calculations are made of the course of the specific humidity concentration in the hall depending on variables: the position of the chiller in the unit, the amount of cooling capacity, the type of circulation mode and the setting of the lower and upper limits, which are described in the first part of the calculation. Together with the humidity waveform, the energy consumption values of the individual equipment in the unit are quantified: chiller, fan, heater. Furthermore, the consumptions are converted into operating costs at a given unit setting. Finally, suitable setup options are evaluated to achieve an acceptable indoor environment in terms of humidity and optimum operating costs.

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