[esp-r] Re: Questions about *.cgc file ?

[Jon Hand]

A recent question about lighting controls in ESP-r (see below).

To understand what is happening in lighting control it is
useful to run your simulation with the "trace" option for
casual gains turned on. At each timestep it will print
the values of many of the variables that are being used
in the calculations.

The switch off 150% is used to ensure that the light
from the sun is 150% of what is assumed to be provided
by the lighting in the room. This is intended to
keep the room from appearing dark when the switch-off
happens.  You could use a different switch off level
if you want.

The control slope is not a variable that I am familiar
with. Which control law are you using?

Regards, Jon Hand


-----Original Message-----
From: esp-r-bounces at lists.strath.ac.uk on behalf of QIU
Sent: Tue 7/15/2008 9:38 AM
To: esp-r
Subject: [esp-r]  Questions about *.cgc file ?
 
Dear all,

I set something in my casual gain control *.cgc file as follows,

illuminance set point, 320 lux, 
switch off level, 150%
night calibration, 44.5 lux
control slope, -0.028

I think the light should switch off if illuminace is lower than 320 lux. but after simulation, from "zone casual gain trace file", I find light switch off under the condition that illuminace is lower than 75 lux, why that?

what function does "switch off level, 150%" have?
and  what function does "control slope, -0.028" have?
and how to get the control slope number?
 

thank you.

Warm regards, 
ZZ


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