Condensing / Evaporating Temperature Calculator

Condensing / Evaporating Temperature Calculator | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Math & Numbers
Input types: select, number
Output type: json
Sample coverage: 4
API ready: Yes

Overview

The Condensing / Evaporating Temperature Calculator estimates saturated condensing and evaporating temperatures for refrigeration circuits using coil approach values, measured saturated pressures, or subcooling and superheat. Enter temperatures in °C, K, or °F and pressures in bar, MPa, kPa, or PSI; results are reported in °C.

When to use

Estimate T_cond and T_evap from ambient, cooling-medium, and coil approach temperatures.
Convert measured saturated pressures into estimated saturation temperatures for R-22, R-134a, or R-410A.
Calculate temperature estimates from liquid-line temperature with subcooling and suction temperature with superheat.

How it works

1Choose one of three calculation modes: coil approach, saturated pressures, or subcooling and superheat.
2Enter the mode-specific temperatures, pressure readings, refrigerant, and measurement units.
3For gauge pressure, the calculator converts readings using the supplied atmospheric pressure; absolute pressure is used for the saturation calculation.
4The calculator returns estimated T_cond and T_evap values in °C, with configurable decimal places.

Use cases

HVAC technicians can compare estimated saturation temperatures with field temperature and pressure measurements.
Refrigeration engineers can estimate compressor temperature lift from high-side and low-side saturated pressures.
Commissioning teams can check coil approach, subcooling, and superheat calculations using consistent units.

Examples

1. Estimate temperatures from coil approach

HVAC technician

Background

A technician is reviewing a circuit with an ambient temperature of 35 °C and a cooling-load medium temperature of 12 °C.

Problem

The technician needs quick estimates of saturated condensing and evaporating temperatures using measured approach differences.

How to use

Select From coil approach, enter 35 °C for ambient temperature, 12 °C for medium temperature, 12 K for condenser approach, and 8 K for evaporator approach.

Temperature unit: °C; condenser approach: 12 K; evaporator approach: 8 K; decimal places: 4.

Outcome

The calculator returns T_cond = 47 °C and T_evap = 4 °C.

2. Convert R-410A gauge pressures to saturation temperatures

Refrigeration service engineer

Background

A service reading shows 27 bar gauge on the condensing side and 9 bar gauge on the evaporating side of an R-410A circuit.

Problem

The engineer wants saturation temperature estimates and the temperature lift between the two sides.

How to use

FAQ

Which refrigerants does the pressure mode support?

Pressure mode supports R-22, R-134a, and R-410A.

What is the coil approach formula?

T_cond equals ambient temperature plus condenser approach ΔT, while T_evap equals medium temperature minus evaporator approach ΔT.

Can I enter gauge pressure?

Yes. Select Gauge and provide the local atmospheric pressure, or use the default value of 1.01325 bar.

What does the pressure mode calculate?

It uses measured condensing and evaporating saturated pressures with an inverse Antoine fit to estimate both temperatures.

What units are supported?

Temperature inputs support °C, K, and °F. Pressure inputs support bar, MPa, kPa, and PSI in absolute or gauge form.

Pressure unit: bar; pressure form: gauge; atmospheric pressure: 1.01325 bar; temperature unit: °C; decimal places: 4.

3. Use subcooling and superheat readings

Refrigeration technician

Background

A technician has measured the liquid-line temperature, suction temperature, subcooling, and superheat during a system check.

Problem

The technician needs temperature estimates without entering pressure readings.

How to use

Select From subcooling & superheat, enter the liquid-line temperature and subcooling value, then enter the suction temperature and superheat value.

Temperature unit: °C; enter SC and SH in K or °C differences; set the required decimal places.

Outcome

The calculator estimates T_cond as liquid-line temperature minus SC and T_evap as suction temperature minus SH, with results reported in °C.

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Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Estimate temperatures from coil approach

2. Convert R-410A gauge pressures to saturation temperatures

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3. Use subcooling and superheat readings