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Refrigeration Cycle Lab
Read pressures, chase superheat and keep the compressor alive.
Difficulty: IntermediatePlay time: about 12 minutes
Play Refrigeration Cycle Lab nowOpens the full-screen game - or play in place below.
Workplace narrative
A walk-in cooler is not holding temperature and the store manager is counting spoiled stock. The system is running, which means the problem is in the numbers: pressures, temperatures and the superheat that tells you whether the evaporator is doing its job. Work the cycle like a refrigeration tech - understand what each reading means, then tune the system so the compressor gets cool gas, not liquid.
Why this skill matters
Superheat tuning and cycle diagnosis are daily work for refrigeration and HVAC technicians. Strong performance supports the HVAC/R pathway and building-systems careers.
Learning objectives
- Name the four parts of the vapour-compression cycle and what each does
- Understand superheat and why it protects the compressor
- Calculate system efficiency (COP) from cooling and power
- Set evaporator superheat to the target band on a live gauge
Equipment and components
Walk-in cooler systemCompressor and condenserEvaporator and expansion valveManifold gauge setSuction and liquid line thermometersRefrigerant charging equipment (reference)
Technical principles
- The compressor pumps vapour, not liquid - liquid slugging destroys it
- Superheat is the temperature rise of vapour above its saturation point
- COP compares cooling delivered to electrical power consumed
- Low superheat risks liquid return; high superheat starves the evaporator
How to play
- Answer the cycle questions from first principles
- For calculations, keep temperatures in the same scale before subtracting
- Slide the gauge to the target superheat and check
- Read every explanation - it is the difference between a guess and a diagnosis
Rules
- Each question is worth 10 points plus streak bonuses
- Hints cost 3 points
- Pass each level with 70% or more
Formula and calculation section
Superheat
SH = Tsuction - Tsat
Suction vapour temperature minus the saturation temperature at evaporating pressure - typically 5-8 K for comfort cooling.
Coefficient of Performance
COP = Q_cooling / W_input
Cooling delivered divided by electrical power. Typical coolers run COP 2-4.
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Play right here
The full game runs on this page - no account, no install. Or open the full-screen play mode with the button above.
Level 1/2Score 0Streak 0Hints 0
Your shift briefing
A walk-in cooler is not holding temperature and the store manager is counting spoiled stock. The system is running, which means the problem is in the numbers: pressures, temperatures and the superheat that tells you whether the evaporator is doing its job. Work the cycle like a refrigeration tech - understand what each reading means, then tune the system so the compressor gets cool gas, not liquid.
Feedback approach
Explanations connect each number to what is physically happening inside the system - the model a refrigeration tech builds with a manifold gauge in hand.
Common mistakes
- Charging by pressure alone instead of superheat
- Confusing condenser and evaporator duties
- Ignoring liquid slugging risk at low superheat
- Reading temperatures without allowing the system to stabilize
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Keep learning
Return to the HVAC / Refrigeration hub to see the full skill path.