Paraffins To Cut Energy Consumption In Homes Eurasia Review “They work well,” explained Álvaro Campos, a researcher on the project, “and water is very cheap, but large volumes are needed to achieve significant heat storage, which restricts their.. The UPV/EHU research group ENEDI has developed a prototype with 50% less volume and more flexible in terms of design; it has a prismatic shape, is easy to integrate into buildings and offers optimum use of space. What is more, its modular nature allows the design to be easily changed. The system is based on the use of latent heat from the solid-liquid phase change of materials known as PCMs (Phase Change Materials). “When we heat these materials they have the capacity, once they reach their phase change temperature, to start changing their state; and by keeping the temperature practically constant, they allow a very high quantity of energy to be stored; that way, we can achieve much greater energy density with smaller heat losses into the atmosphere,” explained Campos.