Trial / Demo
How can I model chilled beams in ApacheSim?
You can model chilled beams in 2 ways:
- In ApacheSim, set up cooling with radiant fraction 0.15.
- In ApacheHVAC, set up a 'Direct acting heater' (working in cooling mode) with radiant fraction 0.15.
If you go for option 2 bear in mind the following points:
- You must click on 'Sensor' to generate an on/off control signal, and this signal must be on for the device to operate. This feature allows the heater/cooler to be turned off under certain conditions, but in most cases all that's required is that a continuous 'on' signal is generated. This can be done by setting a high Set Point such as 50C (make sure 'High Sensor Input' is OFF).
- Under 'Proportional Controller', Sensor Radiant Fraction should be set to 0 to specify an air temperature sensor.
- In the box 'Output at Max Control Signal (kW)' type MINUS the available cooling output of the chilled beams.
- In the box 'Output at Min Control Signal (kW)' type 0.
- The direct acting heater does not provide a connection to a chiller, so you'll need to apply suitable COP and distribution factors to the results.
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