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RE: [EnergyPlus_Support] Thermostat Setpoints Schedule





HI, Richad
 
This is another problem with the third party input programs or the  templates.
 
The always 4 schedule is used for temperature or thermostat type. (Limit = any number, i.e., no type nor limits.)
 
Always 20, always 23, etc. for temperature without using the 'temperature' as type limits.
 
0 is the name for always off, and 'any number' was the type.
 
Because many examples are given as such, the need for the shedulte type limit is lost to some uwers.
 
At one time, I remember that the 0 and 0.0 would flag a warning if not properly used.
 
Dr. Li.



To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: RRaustad@xxxxxxxxxxxx
Date: Mon, 22 Aug 2011 08:49:14 -0400
Subject: Re: [EnergyPlus_Support] Thermostat Setpoints Schedule

 
The limits object tells you the allowed "range" of values and the type of values (real or integer = continuous or discrete). So your temperature schedule can have any real number between -60 and 200, you can use 22.512C, and the type of number is a temperature.

If you look at the temperature schedule, you can't tell if that number is a temperature, but the limits object tells you it is. You also don't know if 22.512C is allowed without looking at the limits object (it is allowed since it is a continuous [real] number between -60 and 200). You also don't know if 15C or 20C is within the allowed range without looking at the limits object.

I am also a little unsure of the syntax used in your example. Here are examples that look correct to me. Notice how the compact schedule has "temperature" for the Schedule Type Limits Name which points to the ScheduleTypeLimits object with the name "temperature". And the Unit Type in the limits object is "temperature", not "Unit Temperature". The numbers in the schedule compact are also real numbers, although you are allowed to use integers which would then be converted to real numbers by the program (since the limit object tells the program they are real numbers).

  ScheduleTypeLimits,
    Temperature,             !- Name
    -60,                     !- Lower Limit Value
    200,                     !- Upper Limit Value
    CONTINUOUS,              !- Numeric Type
    Temperature;             !- Unit Type

  Schedule:Compact,
    HEATING SETPOINTS,       !- Name
    TEMPERATURE,             !- Schedule Type Limits Name
    Through: 12/31,          !- Field 1
    For: Weekdays Weekends Holiday, !- Field 2
    Until: 8:00,15.00,       !- Field 3
    Until: 18:00,20.00,      !- Field 5
    Until: 24:00,15.00,      !- Field 7
    For: SummerDesignDay,    !- Field 9
    Until: 24:00,20.00,      !- Field 10
    For: WinterDesignDay,    !- Field 12
    Until: 24:00,20.00,      !- Field 13
    For: CustomDay1 CustomDay2, !- Field 15
    Until: 8:00,15.00,       !- Field 16
    Until: 18:00,20.00,      !- Field 18
    Until: 24:00,15.00;      !- Field 20


On 8/21/2011 9:53 AM, artitecture82 wrote:
 

Hi All,

Im a bit confused about the use of ScheduleType Limits to constrain the Schdule:Compact used in the ThermostatSetpoint object.

I found an example with these values
ScheduleTypeLimits
------------------
Temperature
lower -60
upper 200
CONTINUOS
UNit Temperature

ScheduleCompact
-----------------
ScheduleTypeLImits:Temperature,
Through: 12/31,
For: AllDays,
Until: 7:00,
15.
Until: 17:00,
20.
Until: 24:00,
15

While I pretty understand what are the values of the ScheduleCompact, I dont understand what the ScheduleTypelimits does.

Can anyone help me to understand?
thanks



-- 
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
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