Innovative heat recovery in a leisure pool: efficient solution from ENGIE Refrigeration
A leisure pool in North Rhine-Westphalia has opted for an innovative solution for heating its swimming pools and shower water. The project was realised in collaboration with a planning office and a general contractor.
Technical solution
The property is heated by heat pumps that generate hot water with an output of approx. 1 MW. There are two heating circuits:
- Shower water: A circuit with a flow temperature of 70 °C and an output of 500 kW, which is covered by the high-temperature heat pump thermeco2 , type HHR 360
- Swimming pool: Another circuit with a flow temperature of 50 °C and an output of 450 kW, supplied by a QUANTUM, type W0450.
Heat pump cascade
A particular challenge was the selection of the optimum capacity for the first stage of the air-to-water heat pump cascade. This challenge could only be overcome by a climate simulation based on local climate data, carried out entirely by ENGIE Refrigeration. The cascade consists of two PENSUM Air Reversible Heat air-to-water heat pumps, which extract heat from the air and bring it to a higher temperature level. The water heated to 25 °C is stored in an 18,000 litre buffer tank and serves as a heat source for the second stage.
Efficiency and reliability
The air-to-water heat pump cascade is particularly efficient and reliable, which is of great importance to the customer. The system can also provide chilled water if required and then operates as an air-cooled chiller.
Future prospects
The project demonstrates the potential of air-to-water heat pump cascades for various industries and applications. There are already plans for further projects with similar requirements.
This example illustrates how ENGIE Refrigeration uses innovative solutions and close cooperation with partners and customers to realise customised and efficient systems for heat generation and use.
Further references
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