Coldroom Refrigeration units Evaporating units Air-cooled condensing units Water-cooled condensing units Cooling pipes Air coolers Liquid chillers Hydraulic piping Refrigerant rule Refrigerant charge limit Psychrometry Setup About Calcooling
©Calcooling2022 v3.8

About Calcooling

About us

Calcooling is a online software service for engineering calculation and selection of industrial products.

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Setup

Preferencies

Psychrometry

Propiedades del aire húmedo

ºC
%
m
atm
kg/kg
ºC
kJ/kg
ºC
kg/m³
kJ/kg·K
W/m·K
µPa·s

Refrigerant charge limit

Load limit

Type of premises
Refrigeration system
m²
m
m³
System location according to art. 6.2:
  • Type 1: All parts of the system containing refrigerant located in an occupied space.
  • Type 2: System with compressors, containers and condensers in machine room or outdoors .
  • Type 3: All parts containing refrigerant located in the engine room or outdoors.
  • Type 4: all parts containing refrigerant inside a ventilated enclosure .
Primary refrigerant
Refrigerant safety class:
  • A1: Low toxicity and non-flammable,
  • A2L: Low toxicity and very slightly flammable,
  • A2: Low toxicity and slightly flammable ,
  • A3: Low toxicity and High flammability,
  • B2L: High toxicity and slightly flammable.
kgeq.CO2/kg
Acute toxicity exposure limit (ATEL) or oxygen deprivation limit (ODL), whichever is lower.
kg/m³
Determined in accordance with 5.2 of UNE-EN 378-1: 2017.
kg/m³
kg/m³
Load limit
kg
Permissible flammable load limit for air conditioning systems and heat pumps, in the application for human comfort, in accordance with RSIF 2019 IF04 Appendix 3.
Charge limit based on the flammability of the refrigerant, according to RSIF 2019 IF04 Appendix 1, table B.
Charge limit based on the toxicity of the refrigerant, according to RSIF 2019 IF04 Appendix 1, table A.
The systems will be positioned so that a refrigerant leak does not penetrate aeration holes, doors, hatches or the like. where there is a possibility that the refrigerant may stagnate, detection and ventilation systems should be provided, according to RSIF 2019 IF04 3.3.2.
Safety requirements for machine rooms must be applied, according to RSIF 2019 IF07.
As of January 2020, the use of HFC refrigerants with a GWP equal to or greater than 2500 in refrigerators and freezers for commercial use is prohibited.
As of January 2022, the use of HFC refrigerants with a GWP equal to or greater than 150 in refrigerators and freezers for commercial use is prohibited.
As of January 2020, the use of HFC refrigerants with a GWP equal to or greater than 2500 in fixed refrigeration appliances is prohibited, except devices designed for applications intended to cool products at temperatures below - 50 ° C.
As of January 2022, the use of fluorinated gases with a GWP equal to or greater than 150 is prohibited in compact multipack refrigeration systems for commercial use, with a rated capacity equal to or greater than 40 kW.
As of January 2025, the use of HFC fluorinated gases with a GWP equal to or greater than 750 in single air conditioning systems containing less than 3 kg is prohibited.
If the maximum permissible refrigerant charge is exceeded, an explosive atmosphere risk analysis must be performed.
Alternative load limit in occupied premises
Alternative for risk management in refrigeration systems in occupied spaces: according to RSIF 2019 IF04 Appendix 4.
The power of the indoor unit must not exceed 25% of the total capacity; The refrigeration exchanger must be designed to prevent ice damage, and must be protected against fan breakage; Refrigeration connections must be permanent, and protected against accidental damage; The doors are not airproof.
Maximum load with additional ventilation, based on an oxygen concentration of 18.5% by volume, assuming a homogeneous mixture.
kg/m³
Maximum load with minimal ventilation, in a non-hermetic room with a 4mm opening under a 0.8m-wide door.
kg/m³
kg
If the maximum indicated charge is exceeded, additional safety measures must be taken: natural or mechanical ventilation, safety shut-off valves, and alarm, together with a leak detector.
kg
%MAX_ALT_LOAD_2%
kg

Refrigerant rule

Regla

kPa(a)
ºC
ºC
kg/m³
kg/m³
kJ/kg
gr/mol
kPa
ºC
kgeq CO2/kg

Hydraulic piping

Selection

Selection parameters
W
ºC
ºC
Fluid freezing. Operation temperature is below the freezing point of the fluid.
m³/h
kg/s
ºC
%
Pipe selection
Pa/m
Nominal diameterFluid velocityPressure lossThermal gain/loss

Calculation

Piping
mm
mm
mm
W/m·K
W/m2·K
m
Pressure drop check
m/s
Pa/m
High refrigerant speed: we recommend to select a larger size.
Low refrigerant speed. We recommend to select a smaller size to reduce refrigerant load.
Excessive pressure drop: we recommend to select a larger size.
thermal loss check
W/m
%
Excessive thermal loss. we recommend to increase insulation thickness.
Surface condensation check
ºC
ºC
Risk of surface condensation: We recommend to increase insulation thickness.
Load calculation
kg
OK. All checks are satisfactory.

Liquid chillers

reset

Selection

Selection parameters
W
ºC
ºC
Fluid freezing. Operation temperature is below the freezing point of the fluid.
Risk of fluid freezing. Operation temperature is very close to the freezing point of the fluid.
m³/h
ºC
Selection filter
Models
ModelRefrigerantCooling capacityPower inputEERDim.
No units found. We have not been able to find ay result matching your selection criteria. Please, try a less restrictive search.

Calculation

Selection
Rating conditions
ºC
m³/h
ºC
ºC
m
High room temperature. The system is working with a high suction pressure, beyond the operational limits.
Calculation error. This system cannot be calculated under these conditions. Please, review input data.
High ambient temperature. The system is working at a high condensing pressure, beyond the operational limits.
High compression ratio The system is working with a high compression ratio, beyond the operational limits.
Low room temperature. The system is working with a low suction pressure, beyond the operational limits.
High discharge temperature. The system is working with a high discharge temperature, beyond the operational limits.
Performance
W
kW
A
A
m³/h
m³/h
kg
W/W
Working parameters
ºC
ºC
Fluid freezing. Evaporation temperature is below the freezing point of the fluid.
kg/s
ºC
ºC
ºC
l/s
W

Dimensions

Dimensions
mm
mm
mm
kg
dB(A)

Ecodesign

Ecodesign parameters
ºC
kWh
According to Regulation (UE) 2016/2281 with regard to ecodesign requirements, seasonal energy performance ratio SEPR for high temperature process chillers with rated capacity up to 400kW, shall not fall below 4,5.
According to Regulation (UE) 2016/2281 with regard to ecodesign requirements, seasonal energy performance ratio SEPR for high temperature process chillers with rated capacity over 400kW, shall not fall below 5,0.
According to Regulation (UE) 2015/1095 with regard to ecodesign requirements, seasonal energy performance ratio SEPR for positive temperature process chillers with rated capacity up to 300kW, shall not fall below 2,58.
According to Regulation (UE) 2015/1095 with regard to ecodesign requirements, seasonal energy performance ratio SEPR for positive temperature process chillers with rated capacity over 300kW, shall not fall below 3,22.
According to Regulation (UE) 2015/1095 with regard to ecodesign requirements, seasonal energy performance ratio SEPR for positive temperature process chillers with rated capacity up to 300kW, shall not fall below 1,70.
SAccording to Regulation (UE) 2015/1095 with regard to ecodesign requirements, seasonal energy performance ratio SEPR for positive temperature process chillers with rated capacity over 300kW, shall not fall below 1,84.
Working beyond operational limits. Under these conditions the compressor is working at a high discharge temperature. Following data is just given as a indication.
The seasonal energy performance ratio SEPR does not meet ecodesign requirements. Please, select other rating conditions or other refrigerant.
Parameters at full load and ambient temperature 35°C
kW
kW
Parameters at part load and ambient temperature 25°C
kW
kW
Parameters at part load and ambient temperature 15°C
kW
kW
Parameters at part load and ambient temperature 5°C
kW
kW
Other items

print

Air coolers

reset

Selection

Selection parameters
ºC
%
W
ºC
ºC
Selection filter
Selected models
ReferenceCooling capacityFin spacingAir-flow rateDim.
No units found. We have not been able to find any unit matching your selection criteria. Please, try a less restrictive search.

Calculation

Selected unit
Rating conditions
ºC
%
ºC
ºC
m
kPa
Performance
W
W
m³/h
l/h
ºC
%
l/s
kPa
Working parameters
ºC
%
W/K
m/s

Features

Physical characteristics
mm
m²
l
Electrical characteristics
kW
A
Dimensions
mm
mm
mm
kg

print

Cooling pipes

Design

Cooling cycle
W
ºC
K
ºC
K
kg/s
%WARN_HIGH_DCHRG%
Cooling pipes
m
m
ºC
%
m
Selection
mm
mm

Suction

Tubería de gas
mm
W/m·K
W/m²·K
High refrigerant speed: we recommend to select a larger size.
Pressure drop check
kPa
K
ºC
ºC
Excessive pressure drop: we recommend to select a larger size.
Excessive thermal loss: we recommend to increase insulation thickness.
Cooling capacity check
Rated loss of cooling capacity due to a lower refrigerant flow displaced by the compressor.
%
Rated thermal loss by air convection along the suction line.
%
Unacceptable loss of capacity: You must select a larger size.
Excessive loss of capacity: We recommend to select a larger size.
Excessive thermal loss: we recommend to increase insulation thickness.
Oil drag check
m/s
m/s
Insufficient refrigerant speed for oil drag: We recommend to select a larger size.
Surface condensation check
ºC
ºC
Risk of surface condensation: We recommend to increase insulation thickness.
OK. All checks are satisfactory.

Liquid

Liquid pipe
mm
W/m·K
W/m2·K
High refrigerant speed: we recommend to select a larger size.
Low refrigerant speed. We recommend to select a smaller size to reduce refrigerant load.
Pressure drop check
m/s
kPa
ºC
K
Risk of liquid cavitation. Excessive pressure drop may lead to flash gas in the liquid line. We recommend to select a larger size.
Cooling capacity check
%
Excessive thermal loss in subcooled liquid line. we recommend to increase insulation thickness.
Surface condensation check
ºC
ºC
Risk of surface condensation: We recommend to increase insulation thickness.
Load calculation
kg
OK. All checks are satisfactory.

Discharge

Discharge pipe
mm
W/m·K
W/m²·K
High refrigerant speed: we recommend to select a larger size.
Pressure drop check
kPa
ºC
Excessive pressure drop: we recommend to select a larger size.
Oil drag check
m/s
m/s
Insufficient refrigerant speed for oil drag: We recommend to select a larger size.
OK. All checks are satisfactory.

Water-cooled condensing units

reset

Selection

Selection parameters
W
ºC
ºC
K
ºC
ºC
%WARN_LOW_T%
Selection filter
Models
ModelCompressorCooling capacityPower inputCOPDim.
No units found. We have not been able to find any unit matching your selection criteria. Please, try a less restrictive search.

Calculation

Selection
Calculation conditions
ºC
ºC
kPa
K
ºC
m³/h
ºC
ºC
High room temperature. The system is working with a high suction pressure, beyond the operational limits.
Calculation error. This system cannot be calculated under these conditions. Please, review input data.
High ambient temperature. The system is working at a high condensing pressure, beyond the operational limits.
High compression ratio The system is working with a high compression ratio, beyond the operational limits.
Low room temperature. The system is working with a low suction pressure, beyond the operational limits.
High discharge temperature. The system is working with a high discharge temperature, beyond the operational limits.
Calculated performance
W
kW
A
A
W/W
Working parameters
ºC
ºC
ºC
ºC
kg/s
W/K
W/m2K
W/m2K
W/m2K
%
%

Dimensions

Condenser dimmensions
mm
mm
mm
kg
dB(A)

print

Air-cooled condensing units

reset

Selection

Selection parameters
W
ºC
ºC
K
ºC
ºC
Selection filter
Models
ModelCompressorCooling capacityPower inputCOPDim.
No units found. We have not been able to find any unit matching your selection criteria. Please, try a less restrictive search.%ERROR_EQ_CALC%

Calculation

Selection
R404A banned in the EU. As of January 2020, the placing in the EU market of fixed refrigeration equipment operating with HFCs with a GWP of 2500 or more is prohibited, except for military uses.
Ban of HFCs from 40kW in the EU The placing on the EU market of multipack centralised refrigeration systems for commercial use with a rated capacity of 40 kW or more that contain HFC is banned from January 2022.
Rating conditions
ºC
ºC
kPa
K
ºC
ºC
m
High room temperature. The system is working with a high suction pressure, beyond the operational limits.
%ERROR_EQ_CALC%
High ambient temperature. The system is working at a high condensing pressure, beyond the operational limits.
High compression ratio The system is working with a high compression ratio, beyond the operational limits.
Low room temperature. The system is working with a low suction pressure, beyond the operational limits.
High discharge temperature. The system is working with a high discharge temperature, beyond the operational limits.
Calculated performance
W
kW
A
A
m³/h
W/W
K
Working parameters
ºC
ºC
ºC
ºC
kg/s
W/K
W/m2K
W/m2K
W/m2K
%
%
K
kPa

Dimensions

Condenser dimmensions
mm
mm
mm
kg
dB(A)

Ecodesign

Ecodesign parameters
ºC
The working group, responsible for the Ecodesign standards in condensing units, admits both rating conditions for cooling capacity according to prEN13215:2015
kWh
According to Regulation (UE) 2015/1095 with regard to ecodesign requirements, seasonal energy performance ratio SEPR for positive temperature condensing units with rated capacity between 5 and 20kW, shall not fall below 2.55.
According to Regulation (UE) 2015/1095 with regard to ecodesign requirements, seasonal energy performance ratio SEPR for positive temperature condensing units with rated capacity between 20 and 50kW, shall not fall below 2.65.
According to Regulation (UE) 2015/1095 with regard to ecodesign requirements, seasonal energy performance ratio SEPR for negative temperature condensing units with rated capacity between 2 and 8kW, shall not fall below 1.60.
According to Regulation (UE) 2015/1095 with regard to ecodesign requirements, seasonal energy performance ratio SEPR for negative temperature condensing units with rated capacity between 8 and 20kW, shall not fall below 1.70.%ECO_WARN_COP%
Data provided by way of indication. Under these conditions the compressor is working at a high discharge temperature. Following data is just given as a indication.imprimir
The seasonal energy performance ratio SEPR does not meet ecodesign requirements. Please, select other rating conditions or refrigerant.
Parameters at full load and ambient temperature 32°C
kW
kW
According to Regulation (UE) 2015/1095 with regard to ecodesign requirements, the coefficient of performance COPA for positive temperature condensing units with rated capacity between 0.2 and 1kW, shall not fall below 1.40.
According to Regulation (UE) 2015/1095 with regard to ecodesign requirements, the coefficient of performance COPA for positive temperature condensing units with rated capacity between 1 and 5kW, shall not fall below 1.60.
According to Regulation (UE) 2015/1095 with regard to ecodesign requirements, the coefficient of performance COPA for negative temperature condensing units with rated capacity between 0.1 and 0.4kW, shall not fall below 0.80.
According to Regulation (UE) 2015/1095 with regard to ecodesign requirements, the coefficient of performance COPA for negative temperature condensing units with rated capacity between 0.4 and 2kW, shall not fall below 0.95.
The coeficient of performance COP does not meet ecodesign requirements. Please, select other rating conditions or refrigerant.
Parameters at full load and ambient temperature 25°C
kW
kW
Parameters at part load and ambient temperature 25°C
kW
kW
Parameters at part load and ambient temperature 15°C
kW
kW
Parameters at part load and ambient temperature 5°C
kW
kW
Parameters at full load and ambient temperature 43°C
Data provided by way of indication. Under these conditions the compressor is working at a high discharge temperature. Following data is just given as a indication.imprimir
kW
kW
Other items

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Evaporating units

reset

Selection

Selection parameters
ºC
%
W
K
ºC
ºC
K
ºC
Selection filter
Selected models
ReferenceRefrigerantCooling capacityFin spacingAir-flow rateDT1 ev.Dim.
No units found. We have not been able to find any unit matching your selection criteria. Please, try a less restrictive search.

Calculation

Selected unit
Rating conditions
ºC
%
ºC
ºC
ºC
K
K
kPa
K
m
h
Performance
W
W
m³/h
l/h
ºC
%
kg/s
Working parameters
ºC
%
W/K
ºC
K

Features

Physical characteristics
mm
m²
l
Electrical characteristics
kW
A
Dimensions
mm
mm
mm
kg

print

Refrigeration units

reset

print

Selection

Selection parameters
ºC
%
ºC
W
Selection filter
R404A banned in the EU. As of January 2020, the commercialization in the European Union of fixed refrigeration equipment operating with HFCs with a GWP of 2500 or more is prohibited, except for military uses.
Models
ModelRefrigerantCooling capacityPower inputCOPDim.
No units found. We have not been able to find ay result matching your selection criteria. Please, try a less restrictive search.

Calculation

Selection
Rating conditions
ºC
%
ºC
m
High room temperature. The system is working with a high suction pressure, beyond the operational limits.
Calculation error. This system cannot be calculated under these conditions. Please, review input data.
High ambient temperature. The system is working at a high condensing pressure, beyond the operational limits.
High compression ratio The system is working with a high compression ratio, beyond the operational limits.
Low room temperature. The system is working with a low suction pressure, beyond the operational limits.
High discharge temperature. The system is working with a high discharge temperature, beyond the operational limits.
Performance
W
kW
A
A
m³/h
m³/h
kg
W/W
Working parameters
ºC
ºC
kg/s
ºC
ºC
ºC

Dimmensions

Condenser dimensions
mm
mm
mm
kg
dB(A)
Evaporator dimensions
mm
mm
mm
kg
Calculate cooling connectios for this system.

Ecodesign

Ecodesign parameters
ºC
%
kWh
%ECO_WARN_TDESC%
Parameters at full load and ambient temperature 32°C
kW
kW

Coldroom

reset

Start

Cold room type
mm
m
m
m
m³
Application
ºC
Location
ºC
Standard calculation and selection of cooling units. Click here to select a refrigeration unit based on standard parameters.

Products

Product type
ºC
%
ºC
%
kJ/kg·K
kJ/kg
kJ/kg·K
Packaging
kg/kg
Product loading
kg/m³
kg
%/24h
kg/24h
ºC
Product cooling
kg
mm
mm
mm
kg/m³
W/m·K
m/s
ºC
h
ºC
Product drying
%
d
kg/dia
m/s
m2
m³/h

Room

Location
m
ºC
%
ºC
ºC
Thermal insulation
m²
mm
m²
mm
m²
mm
m²
mm
Glazing
m²
Insolation
kWh/m²

Air renewal

Ventilation through doors
ºC
%
m
m
min
/24h
/24h
Controlled atmosphere
kgCO2/24h
%
m³/h

Loads

Staff occupancy
W/pers
pers
Lighting
W/m²
m²
Door heater
W/m
m
Defrost
Fans
m³/h
Pa
%
kW
Other thermal loads
kW
h/24h

Results

Cooling needs
h
kJ
kJ
kJ
kJ
kJ
h
Necessary cooling capacity
Cooling capacity for cooling new product inlet with continuous operation, with no door openings and no defrost cycles.
W
Cooling capacity to keep the room temperature with no product inlet.
W
W
Necesary heating capacity
W
W
Too high heat loss through panels: Heat flow through the insulation is higher than the maximum recommended values. We recommend to increase insulation thickness.
Fresh product input: the inlet temperature of goods is higher than the the freezing point.
Floor heating: Floor heating or ventilation might be needed to prevent the ground from freezing.
Insufficient floor insulation: Insufficient or no floor insulation will lead to ground freezing.
CO2 concentration: Respiration of goods will generate CO2, and its concentration will be higher than 2% if there is no atmosphere control system. Such a level of CO2 can be harmful for certain goods.
CO2 concentration: Respiration of goods will generate CO2, and its concentration will be higher than 5% if there is no atmosphere control system. Such a level of CO2 can be harmful for certain goods and is dangerous for humans. There must be a forced ventilation previous to door opening.
Superficial condensation: Insufficient insulation of the enclosure will lead to water vapour condensation on the outer face. We recommend to increase the insulation thickness.
Superficial condensation: There might be water vapour condensation on the door or window outer face. We recommend to use triple glass with double air chamber.
Superficial condensation: There might be water vapour condensation on the floor perimeter. We recommend to increase floor insulation.

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Cooling calculator

Coldroom

Coldroom

Calculation of cold rooms, process rooms, blast cooling tunnels, etc.

 Refrigeration units

Refrigeration units

Calculation and selection of refrigeration units for cold rooms

 Evaporating units

Evaporating units

Calculation and selection of air-cooling evaporating units operating with HFC refrigerant

 Air-cooled condensing units

Air-cooled condensing units

Calculation and selection of condensing units and refrigeration plants with air-cooled condenser.

 Water-cooled condensing units

Water-cooled condensing units

Calculation and selection of water-cooled condensing units

 Cooling pipes

Cooling pipes

Calculation of refrigerant pipes for refrigeration split units and centralised DX systems.

 Air coolers

Air coolers

Calculation and selection of air-cooling units operating with glycol water or brine

 Liquid chillers

Liquid chillers

Calculation and selection of process chillers

 Hydraulic piping

Hydraulic piping

Calculation of hydraulic pipes for indirect refrigeration systems with glycol water or brine.

 Refrigerant rule

Refrigerant rule

Calculation rule for thermophysical properties of most usual refrigerants.

 Refrigerant charge limit

Refrigerant charge limit

Calculation of the refrigerant charge limit according to safety regulations.

 Psychrometry

Psychrometry

Calculation of psychrometric properties of moist air.