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- Title
Сучасні тенденції використання термохімічних акумуляторів теплоти сонячної енергії на прикладі цеолітів.
- Authors
Бошкова, І. Л.; Волгушева, Н. В.; Бошков, Л. З.; Бондаренко, О. С.; Гречановський, А. П.
- Abstract
Thermochemical heat storage by zeolites is currently promising for seasonal heat storage. The method of heat storage by zeolites is based on the use of heat associated with adsorption and desorption. This method, compared to conventional heat storage (water or heat storage using phase transition heat), is characterized by an energy intensity 4-5 (theoretically 10-12) times higher than that of conventional systems. Of particular importance is the correct choice of zeolite. The structure and physical properties of KA, NaA, CaA, NaX, CaX zeolites are considered as having found the greatest practical application. For thermochemical heat storage, zeolites of type A and X are used. The principle of operation of an intermittent zeolite cycle using solar energy is considered. The thermal power of the system is determined by integrating the total energy entering the zeolite container during the day. The distribution between the cooling capacity and the heating capacity provides an efficiency of the zeolite cycle, typically between 35% and 50%. An analysis of a solar zeolite system that provides heating, cooling and hot water for residential buildings is presented. The system worked continuously throughout the year and provided more than 90% of all energy needs of the house. For the effective use of zeolites in thermochemical heat accumulators, it is necessary not only to choose the right type of zeolite, but also to organize its correct preparation and regeneration. The use of microwave energy for preparation (stage of hydrothermal crystallization for thermal activation of zeolites, which is usually carried out at 500-700 °C for 3-5 hours) and regeneration of zeolites allows not only to remove adsorption-related moisture, but also to obtain a unique internal structure of the material.
- Subjects
HEAT storage; PHASE transitions; HEAT regenerators; CHOICE (Psychology); HYDROTHERMAL synthesis; SOLAR heating; ENERGY intensity (Economics); ENERGY consumption
- Publication
Refrigeration Engineering & Technology, 2023, Vol 59, Issue 1, p66
- ISSN
0453-8307
- Publication type
Article
- DOI
10.15673/ret.v59i1.2609