[esp-r] CFC control and U-value.

[Hugo Santos]

Good afternoon to everyone,

My question is mostly directed to Bartosz Lomanowski but maybe somebody else
may have the answers.

I've successfully implemented CFC windows in my models but there are two
details that are bugging me:

The first one is related to the complex fenestration control (by schedule)
and more specifically the simplest on/off control. In it there are two
setpoints to be defined for opening and closing the shading layer. I'm
assuming that, when using a temperature sensor, the closing setpoint works
in a direct way (shading is closed when temperature goes OVER the setpoint)
and that the opening setpoint works in a inverse way (shading is opened when
temperature goes BELOW the setpoint). If that is the case, then how may I
implement a control that opens the shades at night when the internal
temperature is over a specific setpoint (which seems contrary to the control
logic)?

The second issue is how can I be sure of the U-value for my glazing system?
Is conduction dealt within the CFC model or should my MLC emulate the
correct U-value for the glazing system? Looking at the .cfc files, it seems
that conductivity for glass is not taken into account, only the gas layers
have conductivity values attributed to them while glass layers seem to only
have optical characteristics. If CFC takes glass conductivity into account,
does that mean that to find the U-value I must recreate the glazing system
defined in GSLEdit but in a program like Window 6 in order to find exactly
what are the physical characteristics of the glazing system?

Thanks in advance for any help. Regards,

Hugo Santos
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