User Manual

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3.3.5 Energy comparison with other strategies
The DESIGO INSIGHT management station allows for displaying savings by
means of an energy comparison table. The most important characteristic values
are calculated and displayed online based on known plant variables.
Table 3-7
Energy comparison table with conventional ERC control and Economizer tx2 in DESIGO INSIGHT
A Present power in [kW]
B Provided energy (cumulated power) in [kW]
C Present cost
D Total cost (cumulated cost)
The energy comparison table (Table 3-7) displays conventional ERC strategies:
– Strategy Max ERC recovery ERC is fully controlled
– Strategy Temp. ERC is integrated in the temperature sequence
– Strategy Hum. ERC is integrated in the humidity sequence
– Strategy Enthalpy. ERC is controlled to the supply air setpoint
enthalpy
The last column contains the Economizer tx2 strategy.
The table visualizes the following variables:
– Output and energy consumption for thermal air handling, provided by the
processes heating, cooling, humidification and dehumidification.
– Water costs as a function of the humidity increase.
– Momentary and added costs as a function using cost factors for weighted output
and energy consumption.
– Fan energy and temperature increase caused by the fan. Electrical output and
energy is calculated based on volume flow and overall pressure difference via
the ventilator.