HVAC Virtual Engineering & Diagnostics Lab

Refrigerant

Gauge readings

Suction pressure

Suction line temp

Liquid line pressure

Liquid line temp

Compressor and duty

Isentropic efficiency

Cooling capacity

Results

Superheat (dew)

Subcooling (bubble)

Evap dew / bubble

Cond dew / bubble

Discharge temp

Flash gas at TXV outlet

Refrigeration effect

Compressor work

Cycle COP

Compression ratio

Mass flow

Compressor input

EER (Btu/h per W)

Isentropic discharge

Volumetric efficiency

Swept volume needed (4% clearance model)

kW per TR

Pressures are gauge at sea level (101.3 kPa). Line pressure drops are ignored. Thresholds are typical TXV targets. Fixed orifice and inverter systems are charged to the maker's chart.

Cycle lab Design Library 6D-8D Project

Speed Valve gain Bulb lag SH setting Charge

Operating inputs

Running hours per year Average load factor Grid factor (kg CO2e/kWh) Refrigerant charge (kg) Leak rate (% per year) End of life recovery (%) Efficiency degradation (% per year)

Equipment life

The grid factor is an example value only. Replace it with the published grid emission factor for your region.

Energy

Compressor input at design

Annual energy

Cooling delivered per year

Compressor only. Fans and pumps are not included. Part load is a flat factor, not an IPLV/SEER calculation.

TEWI (EN 378-1 method)

Indirect, from electricity

Direct, from leaks

Direct, at end of life

TEWI over life

TEWI with efficiency degradation

GWP is IPCC AR5 100-year. TEWI = GWP·L·n + GWP·m·(1−α) + n·E·β.

Same duty, every refrigerant

Each refrigerant runs at the same evaporating and condensing dew/bubble temperatures, superheat, subcooling and compressor efficiency as the sidebar. Charge is held the same for a fair GWP comparison, though real charges differ.