Phase change material for electrical storage trough the use of a Carnot battery

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The Carnot battery is storing electrical energy in the form of heat. A heat pump converts the excess electricity into heat, which is stored in a thermal energy storage. When the demand of electricity is high, the stored thermal energy is converted back to electricity through a power cycle. The technlogy is applied to a district heating network. Sensible storage presents low compactness and the use of PCM is very promising. However, efficient and low-cost PCM needs to be developed for this application. Renewable electricity production requires large electrical storage device. Electrochemical batteries present a short lifetime, are costly and highly polluting. RENEWBAT proposes to develop an innovative system, more sustainable, which enable to maximize the use of renewable electricity and, at the same time, its cost .The concept of the Carnot battery is to store electrical energy in the form of heat. A heat pump converts the excess electricity produced by renewable sources into heat, which is stored in a thermal energy storage. When the demand of electricity is high, the stored thermal energy is converted back to electricity through a power cycle.Respect to the equipment available on the market, it has three main innovativeaspects:The technology of Carnot battery is reversible. One reversible machine replaces the two independent equipment usually used (heat pump and Rankine cycle).Waste heat integration. The use of waste heat (from chillers, datacenter, industry for example) allows to reach high roundtrip efficiencies.Compact thermal energy storage. The use of phase change material (PCM) enables a smaller thermal storage volume (4 times respect to water).The Carnot battery presents the following specifications:Compactness > 10 kWh/m3Storage duration > 72hRoundtrip efficiency > 90%Purchase cost < 500€ / kWhOptimized ans scalableLifetime > 25 yearsThe application of the Carnot battery to district heating is very promising because it allows to perform thermal and electrical peak shaving, the temperature level are leading to high efficiencies and there is a mass market available worldwide.For the district heating application, the compactness is very important and sensible storage are too bulky. There is a nees for a PCM which can work at temperature levels of 78°C, with a high power (400 kW) for a 100 kWth, with a low environmental impact and at low cost.more info ==> https://www.labothap.uliege.be/cms/c_7157128/en/spin-off-renewbat

Project Idea Metadata

• Project Idea Name: Phase change material for electrical storage trough the use of a Carnot battery
• Date: 3/24/2022 7:24:07 AM
• Administrators:

Project Idea Description

Renewable electricity production requires large electrical storage device. Electrochemical batteries present a short lifetime, are costly and highly polluting. RENEWBAT proposes to develop an innovative system, more sustainable, which enable to maximize the use of renewable electricity and, at the same time, its cost .

The concept of the Carnot battery is to store electrical energy in the form of heat. A heat pump converts the excess electricity produced by renewable sources into heat, which is stored in a thermal energy storage. When the demand of electricity is high, the stored thermal energy is converted back to electricity through a power cycle.

Respect to the equipment available on the market, it has three main innovativeaspects:

• The technology of Carnot battery is reversible. One reversible machine replaces the two independent equipment usually used (heat pump and Rankine cycle).
• Waste heat integration. The use of waste heat (from chillers, datacenter, industry for example) allows to reach high roundtrip efficiencies.
• Compact thermal energy storage. The use of phase change material (PCM) enables a smaller thermal storage volume (4 times respect to water).

The Carnot battery presents the following specifications:

• Compactness > 10 kWh/m3
• Storage duration > 72h
• Roundtrip efficiency > 90%
• Purchase cost < 500€ / kWh
• Optimized ans scalable
• Lifetime > 25 years

The application of the Carnot battery to district heating is very promising because it allows to perform thermal and electrical peak shaving, the temperature level are leading to high efficiencies and there is a mass market available worldwide.

For the district heating application, the compactness is very important and sensible storage are too bulky. There is a nees for a PCM which can work at temperature levels of 78°C, with a high power (400 kW) for a 100 kWth, with a low environmental impact and at low cost.

more info ==> https://www.labothap.uliege.be/cms/c_7157128/en/spin-off-renewbat

The Carnot battery is storing electrical energy in the form of heat. A heat pump converts the excess electricity into heat, which is stored in a thermal energy storage. When the demand of electricity is high, the stored thermal energy is converted back to electricity through a power cycle. The technlogy is applied to a district heating network.

Sensible storage presents low compactness and the use of PCM is very promising. However, efficient and low-cost PCM needs to be developed for this application.