modelDHWDiscomfort
Information
This model calculates the hourly integral characterising DHW cold discomfort
Hypothesis and equations
This model calculates the hourly integral of the difference between water tank temperature and thermally-acceptable condition range.
This range is defined by the parameter DiscomfortThreshold around the setpoint temperature.
Bibliography
Model adapted from ThDiscomfort.
Instructions for use
Connect the realinput Twatertank to the water tank temperature.
Connect the realInput TsetpointDHW to the DHW setpoint temperature.
Set discomfort threshold for the study. The more it is high, the more discomfort will be low because the comfort range will be larger.
Precise if DHW drawing is taken into account. The inclusion of DHW drawing allows to not overestimate the discomfort by preventing its calculation when there no DHW use.
Known limits / Use precautions
The output OutColdDiscomfort is positive and in [°C.h] unit. It is the difference in absolute value between the range of acceptable thermal comfort and water tank temperature which is integrated over time.
The output OutNbHourColdDiscomfort is positive and in [h] unit. It indicates the number of discomfort hours.
Validations
Validated model - Benoît Charrier 07/2016
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Licensed by EDF under a 3-clause BSD-license
Copyright © EDF 2009 - 2023
BuildSysPro version 3.6.0
Author : Benoît CHARRIER, EDF (2016)
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Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | DisconfortThreshold | 1 | Comfort range |
| Boolean | UseDHWdrawing | false | Consider DHW scenario (by default DHW discomfort will be evaluated at all times) |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | TsetpointDHW | DHW setpoint temperature in Kelvin | |
| Modelica.Blocks.Interfaces.RealInput | DHWdrawing | DHW use 1 / No DHW use 0 | |
| Modelica.Blocks.Interfaces.RealOutput | OutColdDiscomfort | Cold discomfort measurement in [C°.h] | |
| Modelica.Blocks.Interfaces.RealOutput | OutNbHourColdDiscomfort | Number of cold discomfort hours [h] | |
| Modelica.Blocks.Interfaces.RealInput | Twatertank | Temperature of the water tank |