Advansor

Ultra-Low Superheat

Name: Ultra-Low Superheat
Brand: Advansor

Maximum energy efficiency Ultra-Low Superheat allows the evaporators to run with a very low superheat setting without having the risk of liquid CO₂ returning to the compressors.

Advansor

Company profile

Fig. 01 — Advansor Ultra-Low Superheat

01 Overview

Typically, the evaporation temperature can be increased by around 4-5 Kelvin, which will give you energy savings of around 10%. This technology will give you the most energy-efficient solution on the market.

Benefits

Increases the evaporation temperature by 4-5 Kelvin, resulting in up to 10% energy savings
Combined with ejector additional 5% savings
Payback time 2 years
Additional 7-8% capacity
Less defrost of cabinets
Safe solution as no liquid is returned to the compressors

How it works
The Ultra-Low Superheat (ULS) option is used to run the evaporators with the highest evaporation temperature possible, without running them completely flooded.

The option consists of a suction accumulator, an internal heat exchanger and an optional ejector.

The suction accumulator is used to capture any liquid coming back from the evaporators and to separate gas from the liquid.

The primary function of the internal heat exchanger is to evaporate and superheat the gas, and liquid CO₂ coming from the suction accumulator. Its secondary function is to subcool the liquid line, resulting in less mass flow in the complete installation and reducing pressure drop.

The ejector is used to empty the suction accumulator of liquid and, if using a gas ejector, to also move flash-gas from MT compressors to parallel compressors.

If you don’t have an ejector, the remaining liquid is evaporated in the internal heat exchanger.

02 Technical dossier