2. Underground thermal storage
2.1 Types of storage classified by temperature level
Storage facilities are often classified according to their temperature level. A distinction is made between :
hot storage (75 to 180°C), associated with power generation systems, industrial waste or incineration plants;
lukewarm storage (25 to 75°C) combined with solar energy or certain waste heat ;
cold storage (below 25°C), often using ambient air. This can be used for heating, generally in conjunction with a heat pump, or for storing cold in winter for cooling in summer.
Generally speaking, in the case of underground thermal storage, the higher the temperature, the greater the...
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Underground thermal storage
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