Toulouse
Project Context
Water Horizon is a Toulouse-based deeptech startup founded in 2017. With its proprietary thermochemical technologies, Water Horizon aims to become a major player in industrial decarbonization. WH supports industrialists in their energy transition across several sectors: waste heat recovery, heat storage and transport, and renewable cooling production.
With its mature technologies, WH is transforming the landscape into a positive energy territory.
STAKEHOLDERS
Toulouse Métropole, Alex Jany Sports Complex Decoset, SETMI Toulouse Ville Waste Treatment Plant
PARTNERS
European Commission
Europe
BUDGET / FINANCING
Total Cost:
6 million euros
Funding:
Water Horizon
European Commission
KEY FIGURES
→ 1,400 tonnes of CO2 avoided per year
2 x 1 MW thermal batteries
→ 6 GWh of energy delivered per year
DESCRIPTION
With its economic and industrial dynamism, the Toulouse basin is ideal for creating synergies between waste heat producers and consumers.
The Energy Recovery Unit (UVE) of SETMI (Saint-Simon district of Toulouse) is a treatment center for household and similar waste.
The facility processes approximately 240,000 tons of waste annually, producing electricity and heat.
A significant amount of this heat is recovered through several urban heating networks, allowing a portion of Toulouse's population to be heated with decarbonized and inexpensive heat. Nevertheless, the highly differentiated consumption profiles between production and consumption limit the recovery, and some of the heat is therefore lost and released into the air.
The Alex Jany swimming pool and ice rink complex, located 15 km from UVE, is a popular sports center that opened in 2011. The proximity of the pool and the ice rink creates a dual, simultaneous need for heating and cooling all year round, allowing for great energy efficiency.
With its mobile thermal battery technology “Move Heat to Cold” (MH2C), Water Horizon will distribute renewable heat and cold from the waste heat of the waste-to-energy plant.
The MH2C battery is charged by the heat from the UVE. Once the battery is full, it is transported to the Alex Jany complex to distribute heat and cold simultaneously. To ensure continuity of service for the sports center, this project will include 2 batteries.
Project Impact
UVE of SETMI:
Best image
Reduction of environmental impact
Continuous upgrade and innovation to comply with evolving regulations
Alex Jany Complex
Lower operating and maintenance costs (boilers and chillers)
→ Reduction of greenhouse gas emissions
Precise temperature management without fluctuation (risk of ice rink thawing)
Localisation / Routing
POINT TECHNOLOGY
Over the past 7 years, WATER HORIZON has refined a unique skill and technical expertise in the recovery of waste heat and the production of renewable cold.
In Europe, fatal industrial heat represents the equivalent of 100 nuclear reactors.
It is from this significant observation that Water Horizon developed its Move Heat To Cold (MH2C) technology: recover waste heat, store it, transport it to distribute it to a distant consumer in the form of renewable cold.
The MH2C battery recovers and reuses waste heat between 100°C and 200°C to redistribute it as heat, but mainly as cold down to -10°C.
Water Horizon takes care of everything! Whether you are a producer of waste heat or a consumer, we handle finding your match, sizing the project, financing it, and operating it.


