K A Samiev¹ , M S Mirzaev² and U X Ibragimov³

¹ Physical-Technical Institute of the AS of the Republic of Uzbekistan, 2B, Chingiz Aytmatov Str., 100084, Tashkent, Uzbekistan

² Bukhara State University, 11, M.Iqbol street, Bukhara, Republic of Uzbekistan

³ Department of Heat Power Energy, Karshi Engineering-Economics Institute, Karshi, 180100, Uzbekistan

Abstract

In this work, the potential of a passive solar heating system with a Trombe wall with phase change materials for the climatic conditions of Uzbekistan was evaluated. A dynamic mathematical model has been developed, and validation has been carried out by comparing experimental data. The annual thermal characteristics of a three-room residential building, a three-room residential building with a Trombe wall, a three-room residential building with a Trombe wall with phase-change heat accumulator materials are determined. Calculations show that the specific energy consumption for heating a 3-room residential building is 211 kW∙hr/m2 ∙year, and the energy consumption for heating such an object with a Tromba wall installed on the southern wall is 134.3 kW∙hr/m2 ∙year, the energy consumption for heating such an object with the Trombe wall installed on the southern wall with phase change materials are 91.8 kW∙hr/m2 year. This means that the use of the Trombe wall system will lead to a reduction in energy consumption by at least 36%. The average value of the thermal efficiency of the Trombe wall for the heating period is 37.08%, and the average value of the thermal efficiency of the Trombe wall with phase change materials for the heating period is 52.6%.