Unit Converter →
Convert common HVAC engineering units.
REFRIGERATION · R744 · HEAT RECLAIM
R744 / CO₂ Heat Recovery Analysis
Quantify how much high-side CO₂ heat can be reclaimed before the gas cooler at the exact entered operating condition—without hiding pressure optimization, exchanger sizing or control assumptions.
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Create or sign in to your free professional account. Calculator access is activated only after the applicable Leal approval policy is satisfied; engineering method and reference content remain visible.
R744 direct transcritical cycle →R744 parallel compression →Natural-refrigerant architecture comparison →OEM compressor performance map →Heat-recovery pinch & UA review →
WHEN TO USE THIS TOOL
Useful during reference & conversion work.
- Resolve unit-system differences quickly across calculations, drawings, schedules and vendor data.
- Look up common formulas, constants and engineering reminders without leaving the HVACR workspace.
- Reduce repeated manual conversion work while keeping the final engineering review with the user.
Frequently asked questions
Does heat recovery increase the refrigeration COP in this calculator?
No. This bounded overlay keeps high-side pressure, compressor states and final gas-cooler outlet unchanged. It redistributes high-side heat rejection between the heat-recovery exchanger and downstream gas cooler, so the underlying theoretical cooling COP stays unchanged.
Does HVACR Studio choose the heat-recovery outlet temperature or high-side pressure?
No. Both remain explicit engineering inputs. The tool does not optimize a transcritical pressure, reclaim temperature or controller setpoint.
Can I calculate a water or glycol flow?
You may enter the applicable secondary-fluid specific heat plus inlet/outlet temperatures. Studio then calculates a mass-flow ratio and, when refrigeration capacity is entered, kg/s. It supplies no default fluid property and does not size pumps, piping or storage.
Do positive endpoint approaches prove the heat exchanger will work?
No. Transcritical CO₂ can have a significant internal pinch because heat capacity changes strongly through gas cooling. Endpoint approaches are screening values only; detailed segmented heat-exchanger or manufacturer analysis remains separate.