Experimental study of the temperature regime of the solar pond in the climatic conditions of the south of Uzbekistan

Abstract

This article is devoted to the experimental study of the temperature regimes of the solar pond in the southern climatic conditions of Uzbekistan. The research was conducted in an experimental version of a solar pond that accumulates low-potential heat. According to research, when taking heat from a salt solar pond, without a coating on its upper surface and comparing the results of a glass-covered experiment is 10-15% higher than that of a glass-covered experiment, when the ambient temperature is 34 °C and solar radiation is 973 W/m2 it is scientifically based that the temperature of saline solar pond water with a concentration of 25-30% rises to a temperature of 53 °C in the lower part of the pond and that the energy storage efficiency of the lower convective zone of the solar pond increases in parallel with increasing solar radiation

Determination of the heat losses of insolation passive solar heating systems

“…Undoubtedly, it is of great practical interest to determine the potential capabilities of these systems in the climatic conditions of our Republic. Existing methods for calculating passive solar heating systems [3] to a large extent allow solving this problem. However, it should be noted that the main feature of passive solar heating systems in general, and the type under consideration in particular, depends on the choice of the optimal design solution for the building as a whole and the combination of the main elements of the heating system in it.…”

“…In the conditions of our Republic, the relevance of using solar energy in heat supply systems as a source of low-grade heat is due to the fact that at present, out of all the heat energy generated in 2000 (46.4 million Gcal), 50,4% was spent for low-temperature needs of the population ( 33.6%) and household sector (16.8%) [1][2][3][4][5][6].…”

“…Depending on the accepted scheme of heat supply to the heated premises, they are distinguished by the type of passive solar heating system: with insolation (i.e. direct), indirect and isolated perception, and transfer of heat from solar radiation [3]. The sun's rays penetrate the heated premises through window openings (usually oversized) and heat the internal enclosures of the premises, which become radiation receivers and heat accumulators, despite the highest thermal efficiency, a number of disadvantages inherent in insolation systems should be noted, such as the instability of the thermal regime, the need to use auxiliary devices that reduce additional heat loss at night, thermal and light discomfort during the day.…”

“…There are passive solar heating systems that are based on the principles of operation of both passive and isolated systems. In this case, the solar thermal collector is placed on the southern vertical wall, and the thermal accumulator is combined with the blocking of the flow and at the same time acts as a radiator of a panel-radiant heating system [3][4][5].…”

CFD analysis for absorber tube of a solar water heater collector

“…Extreme poverty is defined as living on less than $1.90 per day. This population is largely concentrated in developing countries, with about 90% of people living in extreme poverty residing in sub-Saharan Africa and South Asia [14]. And these countries are sunny countries, taking into account all of the above, solar water heater collectors are simple and cheap to make, and at the same time, they require improvement.…”