Calculation algorithm of operational chacteristics of adsorptive heat storage device for decentralized space heating system
Journal Title: Комп’ютерне моделювання: аналіз, управління, оптимізація - Year 2017, Vol 1, Issue 1
Abstract
The work is devoted to the development of an efficient algorithm for solving the problem of calculating the operating characteristics of an adsorption heat energy storage device for a decentralized space heating system. The following calculation procedure is proposed: calculation of the mass transfer coefficient, adsorption amount, useful heat of adsorption, determination of the heat input, it being calculated as heat inputs for heating the adsorbent, device housing, water in the tank, evaporation of water in the tank, heating of the adsorbed water and desorption. Then coefficient of efficiency is calculated. The operating characteristics of a closed-type heat energy storage were studied when the composite adsorbent «silica gel/sodium sulfate» used. The effect of the steam-air flow rate on the efficiency is taken into account by introducing a coefficient equal to the value of the adsorption. An increase in the efficiency coefficient was stated with an increase of the speed of movement and relative humidity of the vapor-air mixture. It is shown that the vapor-air flow temperature practically does not affect its value. Having been used the suggested algorithm, the optimal operating characteristics of an adsorption heat storage device of a closed type based on a composite sorbent «silica gel-sodium sulfate» for a private house heating system are revealed to be air-gas mixture velocities 0.6-0.8 m/s and relative humidity 40-60%. When these operational data applied, the efficiency coefficient is shown to reach the maximum values (about 55 %).
Authors and Affiliations
К. М. Сухой, Е. В. Коломиец, И. В. Сухая, Е. А. Беляновская
Keywords
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