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Main
Hysopt Knowledge Center
Release Notes
Archive 2016
Archive 2017
Archive 2018
Archive 2019
Archive 2020
Archive 2021
Archive 2022
Welcome
How to use the Hysopt wiki
Guided Trial License Exercise
Basic Hysopt Usage
Getting started with Hysopt
Managing Hysopt License
Hysopt Demo - Video Presentation
First login & Resetting password
Creating your first project
The Hysopt anatomy
Unit conversions in Hysopt
P&ID Modeling
How to model your system
Canvas management, Floor plan manager and Layers
Assigning tags and searching for tags and/or IDs
Parametrisation/Changing design parameters
Calculation
System Check
Algorithm
Compute design flows
Diversity and Aggregation
Within a single dwelling
Step 1 : recalculation of the tapflows
Step 2 : calculation of the diversity factor and the diversity flow
Step 3 : calculation of the DHW flow and DHW power at CH side, influenced by a regime changing component like a heat exchanger, HIU, storage tank, ...
Step 4 : aggregation of the DHW flow/power with the CH flow/power at CH side
Multiple dwellings
Step 5 : propagate power, flows and temperature regimes over multiple dwellings and branches
Step 6 : aggregation of the DHW flow/power with the CH flow/power
Diversity standards for DHW
Based on DIN 1988-300
Based on the CIBSE CP1 2020 / Danish Code of Practice DS 439
Based on the Swedish regulation DHA F:101
Based on the Cibse CP1 2015 / Danish Code of Practice DS 439
Based on the French DTU 11-60
Based on the French Costic MTA 2016
Diversity standards for central heating / space heating
Based on the CIBSE CP1 2020 / Varme Stabi 7th edition
Based on a logaritmic function
Parameter validation
Select pipes
Optimise components
Exports
Hysopt pages
Sensitivity Analysis
Pareto analysis: usage
Pareto analysis: calculations
Pareto analysis : change-over
New wiki: Inspiration Library - Wizard
Input Parameters
Control strategy - input parameters
Set Point Profile
Heating & Cooling Library - Input Parameters
Pipes - Input Parameters
KV-value
Radiator Parameters
Partial load analysis
User preferences
Message Overview
Simulation
Control validation
Imposed Load Simulation (ILS) error codes and common mistakes
Real-Time Simulation (RTS) versus Imposed Load Simulation (ILS)
Dynamic simulation
Experimental settings
Component overview
Heating Library
Production Heating
Boilers
CHP (Combined Heat & Power)
Heat pump
Air source vs. Ground source heat pump (under construction)
Heat pump booster
Gas absorption heat pump
Heat pump for heating and cooling
Reversible heat pump
Polyvalent four-pipe heat pump
Hybrid production Heating
Parallel
Serial
Shunt
Header configuration: Heating
Thermal storage heating
Thermal storage sizing algorithms
Distribution circuits
Dividing circuits
Mixing circuits
Throttle circuits
Balance valves
Control valves
Control valve authority
Piping
Heating reverse return (Tichelmann)
Pumps
District Heating
End units and heat exchangers
Radiator/Convector
Satellite units and simultaneous flows
Heat exchangers (HX)
Ambient exchange
Dry cooler 1.0
Dry cooler 1.1
Dry cooler 1.2
Evaporative cooler 1.0
Evaporative cooler 1.1
Evaporative cooler 1.2
Hybrid emission
System peripheral
Design conditions override
Sensors
Expansion vessel
Composite Base Circuits
Cooling Library
Production Cooling
Hybrid production Cooling
Header configuration: Cooling
Thermal storage: Cooling
Change-over Library
Change-over systems
End-units for change-over
Change-over end-unit
NEW - Ventilation Library
Zone library
Control library
Generator
Constant
Temperature constant
External temperature / relative humidity
Heating curve (with displacement)
Ramp
Activation signal generator
Setpoint generator
Sine wave
Time
Tap profile generators
Data files
Controller
PI controller
Modulating room controller for heating/cooling (Thermostat)
On/off room controller for heating/cooling
Thermostatic room controller for radiators
Programmable controller ((extra) large)
Operators
Activator
Comparison
Difference
Hysteresis
Hysteresis (temperature)
Integrator
Minimum/Maximum
Multiply
Negative
Piecewise linear function / function expression
Scaling and truncating
Sum
Low pass filter
Delay
Loopback
Boolean AND/OR/NOT
Graphing
Meter boxes
Unit conversion block
Overrides
Text Library
Projects from start to finish
Conceptual study
Flow charts - Conceptual
Step 1: Preparations
Step 2: The reference model
Plant Room
End units
Capacity controlled Air Handling Units
Control strategy
Step 3: Checking the reference model
Step 4: Load matching
Step 5: Design of alternatives
Step 5.1: Hydraulic optimisation
Step 5.2: Downsizing
Step 5.3: Implementing Inspiration library models
Step 5.4: Pareto-analysis and reporting
Detail Study
Flow charts - Detail model
Step 1: Checklist & Implementing floor plans
Step 2: Drawing the model: Floor plans & P&ID
Step 3: Calculating & troubleshooting your model
Step 4: Reporting (component selections etc.)
Control strategies in the inspiration library
Controllers and code
Inspiration Library - Templates
Production Templates - Heating
Boiler
New Wiki - Basic boiler controls
Cascade configuration of 2/3/4 boilers
Large water content (direct)
Small water content (low loss header)
Solar
Biomass boiler
Production Templates - Cooling
Hybrid production
New Wiki - Solar & Boiler
Biomass boiler & Gas boiler
Domestic Hot Water (DHW)
New Wiki - DHW storage tank
Heat Interface Unit (HIU)
Header configuration
Controls
Pump control
Basic pump control
Advanced pump control
Room control
Change-over examples
CHPs
CHP combined with boilers - Multiple configurations
CHP & Boiler configurations
CHP & Boiler - Parallel configuration
CHP & boiler - Serial configuration
CHP & Boiler - Reverse shunt in return configuration
CHP & Boiler - Reverse shunt in supply
Boiler & CHP - Reverse shunt in supply
CHP - Basic Control
Heat Pumps
HP Basic control strategies
Heat Pump - On/off Control
Air Source Heat Pump - Modulating
Heat Pump stages
Cascade configuration of heat pumps
Heat Pump (HP) & Boiler
HP & Boiler - Parallel configuration
HP & Boiler - Shunt configuration
HP & Boiler - Serial configuration
HP & Boiler - Switchable serial Configuration
Aquifer Thermal Energy Storage (ATES)
ATES 1.2
ATES 2.1
Aquifer Thermal Energy Storage (ATES) templates
ATES 1.2 templates
Geothermal energy storage templates
Borehole Thermal Energy Storage (BTES)
BTES 1.0
BTES 1.4
Borehole Thermal Energy Storage (BTES) templates
BTES 1.0 templates
BTES 1.4 templates
BTES load matching
Error/warning overview
System check error
This base circuit is reversed
Pumps found upstream/downstream of this pump
Pump found in variable part of dividing circuit
Pump in variable part of mixing circuit
No pump to provide flow to the primary side of this hydraulic separator
Pumps found after ...
Pump missing on ... / no pumps over ...
Both of the ... ports should have a pump
Serial pumps on/after ...
Power propagation error
Supply temperature mismatch
Could not resolve power progapagation for this node
UA value and primary return/air volume flow are both locked
Illegal combined power parameter state
Different applications conjoined at this point
Both supply and return temperatures are overridden
Component selection error
Authority smaller than minimal required authority
KVS value et to zero
Fixed pressure drop lower than required pressure drop
Pump head not enough for pressure loss
Total pressure drop larger than 20 bar
No pumps provide pressure for this control valve
Both pump head and pump curve are locked
Design flow rate out of range of pump curve
Heat exchanger supply/return temperatures too close together
No suitable KVS value found
No suitable valve position can achieve desired mixing ratio
Short circuit on premix by-pass
... has pump downstream
No pumps expected
Simulation error
Failed to parse code/expressions
Total losses through windows are larger than design heat load
The volume of the zone is zero
Invalid column name in CSV file
Frequently Asked Questions
Functional questions
Technical specification questions
Folder structure and project identification
Usage of the software
Changing boiler efficiency (with templates)
Visualisation of all parameters in dynamic simulation of >1 month
Implementation of photovoltaic installation data in the simulation environment of Hysopt.
Operations (Shortcuts)
How to use toggle auto-connect
How to execute a site survey with all needed information to feed into Hysopt
Certifications and Awards
CIBSE Building Perfomance Award 2020
Validated by ISSO
Mollier diagram license
Login
Hysopt Academy
Contact Support
Free Trial
Explore the Software
Speak with Sales
Main
Release Notes
Archive 2016
Archive 2017
Archive 2018
Archive 2019
Archive 2020
Archive 2021
Archive 2022
Welcome
How to use the Hysopt wiki
Guided Trial License Exercise
Basic Hysopt Usage
Getting started with Hysopt
Managing Hysopt License
Hysopt Demo - Video Presentation
First login & Resetting password
Creating your first project
The Hysopt anatomy
Unit conversions in Hysopt
P&ID Modeling
How to model your system
Canvas management, Floor plan manager and Layers
Assigning tags and searching for tags and/or IDs
Parametrisation/Changing design parameters
Calculation
System Check
Algorithm
Compute design flows
Diversity and Aggregation
Within a single dwelling
Step 1 : recalculation of the tapflows
Step 2 : calculation of the diversity factor and the diversity flow
Step 3 : calculation of the DHW flow and DHW power at CH side, influenced by a regime changing component like a heat exchanger, HIU, storage tank, ...
Step 4 : aggregation of the DHW flow/power with the CH flow/power at CH side
Multiple dwellings
Step 5 : propagate power, flows and temperature regimes over multiple dwellings and branches
Step 6 : aggregation of the DHW flow/power with the CH flow/power
Diversity standards for DHW
Based on DIN 1988-300
Based on the CIBSE CP1 2020 / Danish Code of Practice DS 439
Based on the Swedish regulation DHA F:101
Based on the Cibse CP1 2015 / Danish Code of Practice DS 439
Based on the French DTU 11-60
Based on the French Costic MTA 2016
Diversity standards for central heating / space heating
Based on the CIBSE CP1 2020 / Varme Stabi 7th edition
Based on a logaritmic function
Parameter validation
Select pipes
Optimise components
Exports
Hysopt pages
Sensitivity Analysis
Pareto analysis: usage
Pareto analysis: calculations
Pareto analysis : change-over
New wiki: Inspiration Library - Wizard
Input Parameters
Control strategy - input parameters
Set Point Profile
Heating & Cooling Library - Input Parameters
Pipes - Input Parameters
KV-value
Radiator Parameters
Partial load analysis
User preferences
Message Overview
Simulation
Control validation
Imposed Load Simulation (ILS) error codes and common mistakes
Real-Time Simulation (RTS) versus Imposed Load Simulation (ILS)
Dynamic simulation
Experimental settings
Component overview
Heating Library
Production Heating
Boilers
CHP (Combined Heat & Power)
Heat pump
Air source vs. Ground source heat pump (under construction)
Heat pump booster
Gas absorption heat pump
Heat pump for heating and cooling
Reversible heat pump
Polyvalent four-pipe heat pump
Hybrid production Heating
Parallel
Serial
Shunt
Header configuration: Heating
Thermal storage heating
Thermal storage sizing algorithms
Distribution circuits
Dividing circuits
Mixing circuits
Throttle circuits
Balance valves
Control valves
Control valve authority
Piping
Heating reverse return (Tichelmann)
Pumps
District Heating
End units and heat exchangers
Radiator/Convector
Satellite units and simultaneous flows
Heat exchangers (HX)
Ambient exchange
Dry cooler 1.0
Dry cooler 1.1
Dry cooler 1.2
Evaporative cooler 1.0
Evaporative cooler 1.1
Evaporative cooler 1.2
Hybrid emission
System peripheral
Design conditions override
Sensors
Expansion vessel
Composite Base Circuits
Cooling Library
Production Cooling
Hybrid production Cooling
Header configuration: Cooling
Thermal storage: Cooling
Change-over Library
Change-over systems
End-units for change-over
Change-over end-unit
NEW - Ventilation Library
Zone library
Control library
Generator
Constant
Temperature constant
External temperature / relative humidity
Heating curve (with displacement)
Ramp
Activation signal generator
Setpoint generator
Sine wave
Time
Tap profile generators
Data files
Controller
PI controller
Modulating room controller for heating/cooling (Thermostat)
On/off room controller for heating/cooling
Thermostatic room controller for radiators
Programmable controller ((extra) large)
Operators
Activator
Comparison
Difference
Hysteresis
Hysteresis (temperature)
Integrator
Minimum/Maximum
Multiply
Negative
Piecewise linear function / function expression
Scaling and truncating
Sum
Low pass filter
Delay
Loopback
Boolean AND/OR/NOT
Graphing
Meter boxes
Unit conversion block
Overrides
Text Library
Projects from start to finish
Conceptual study
Flow charts - Conceptual
Step 1: Preparations
Step 2: The reference model
Plant Room
End units
Capacity controlled Air Handling Units
Control strategy
Step 3: Checking the reference model
Step 4: Load matching
Step 5: Design of alternatives
Step 5.1: Hydraulic optimisation
Step 5.2: Downsizing
Step 5.3: Implementing Inspiration library models
Step 5.4: Pareto-analysis and reporting
Detail Study
Flow charts - Detail model
Step 1: Checklist & Implementing floor plans
Step 2: Drawing the model: Floor plans & P&ID
Step 3: Calculating & troubleshooting your model
Step 4: Reporting (component selections etc.)
Control strategies in the inspiration library
Controllers and code
Inspiration Library - Templates
Production Templates - Heating
Boiler
New Wiki - Basic boiler controls
Cascade configuration of 2/3/4 boilers
Large water content (direct)
Small water content (low loss header)
Solar
Biomass boiler
Production Templates - Cooling
Hybrid production
New Wiki - Solar & Boiler
Biomass boiler & Gas boiler
Domestic Hot Water (DHW)
New Wiki - DHW storage tank
Heat Interface Unit (HIU)
Header configuration
Controls
Pump control
Basic pump control
Advanced pump control
Room control
Change-over examples
CHPs
CHP combined with boilers - Multiple configurations
CHP & Boiler configurations
CHP & Boiler - Parallel configuration
CHP & boiler - Serial configuration
CHP & Boiler - Reverse shunt in return configuration
CHP & Boiler - Reverse shunt in supply
Boiler & CHP - Reverse shunt in supply
CHP - Basic Control
Heat Pumps
HP Basic control strategies
Heat Pump - On/off Control
Air Source Heat Pump - Modulating
Heat Pump stages
Cascade configuration of heat pumps
Heat Pump (HP) & Boiler
HP & Boiler - Parallel configuration
HP & Boiler - Shunt configuration
HP & Boiler - Serial configuration
HP & Boiler - Switchable serial Configuration
Aquifer Thermal Energy Storage (ATES)
ATES 1.2
ATES 2.1
Aquifer Thermal Energy Storage (ATES) templates
ATES 1.2 templates
Geothermal energy storage templates
Borehole Thermal Energy Storage (BTES)
BTES 1.0
BTES 1.4
Borehole Thermal Energy Storage (BTES) templates
BTES 1.0 templates
BTES 1.4 templates
BTES load matching
Error/warning overview
System check error
This base circuit is reversed
Pumps found upstream/downstream of this pump
Pump found in variable part of dividing circuit
Pump in variable part of mixing circuit
No pump to provide flow to the primary side of this hydraulic separator
Pumps found after ...
Pump missing on ... / no pumps over ...
Both of the ... ports should have a pump
Serial pumps on/after ...
Power propagation error
Supply temperature mismatch
Could not resolve power progapagation for this node
UA value and primary return/air volume flow are both locked
Illegal combined power parameter state
Different applications conjoined at this point
Both supply and return temperatures are overridden
Component selection error
Authority smaller than minimal required authority
KVS value et to zero
Fixed pressure drop lower than required pressure drop
Pump head not enough for pressure loss
Total pressure drop larger than 20 bar
No pumps provide pressure for this control valve
Both pump head and pump curve are locked
Design flow rate out of range of pump curve
Heat exchanger supply/return temperatures too close together
No suitable KVS value found
No suitable valve position can achieve desired mixing ratio
Short circuit on premix by-pass
... has pump downstream
No pumps expected
Simulation error
Failed to parse code/expressions
Total losses through windows are larger than design heat load
The volume of the zone is zero
Invalid column name in CSV file
Frequently Asked Questions
Functional questions
Technical specification questions
Folder structure and project identification
Usage of the software
Changing boiler efficiency (with templates)
Visualisation of all parameters in dynamic simulation of >1 month
Implementation of photovoltaic installation data in the simulation environment of Hysopt.
Operations (Shortcuts)
How to use toggle auto-connect
How to execute a site survey with all needed information to feed into Hysopt
Certifications and Awards
CIBSE Building Perfomance Award 2020
Validated by ISSO
Mollier diagram license
Breadcrumbs
Hysopt Knowledge Center
Component overview
Heating Library
On this Page
System peripheral
Sensors
Design conditions override
Expansion vessel
