The efficiency of using a combined solar plant for the heat and humidity treatment of air

Abstract

The authors of this work have proposed a combined solar heating unit for the heat and humidity treatment of greenhouse air supplies. The object of research is a combined solar collector for the simultaneous heating of water and air. The heat and humidity treatment of supply air is an energy-intensive technological process that requires a very large consumption of thermal energy and water resources. For the operation of such a system, electric heating installations are often used; however, these systems are not always available and economical. In this paper, to reduce the consumption of traditional energy for the heat treatment of the air supply, a combined solar collector is proposed, and the results of an experimental study of the operating modes of the installation in the conditions of the city of Karshi are presented. It has been developed combined solar collector, the temperature of the heat carriers at the outlet in the heating mode “water + air” reached up to 48 °C (air) and up to 60 °C (water), which are acceptable for air treatment systems of heat and humidity in greenhouses. As a result of the experimental studies, the high energy efficiency of the combined solar collector in the “water + air” heating mode is shown. It has been established that the efficiency of the installation is in the range of 0.45 - 0.69.

Determination of the heat losses of insolation passive solar heating systems

“…An analysis of the operating experience of such systems shows their undoubted advantage over other types of passive solar heating systems [6][7][8][9][10]. Thus, the actual contribution of solar energy in the annual heat balance, having passive solar heating systems of the type under consideration, in the climatic conditions of the state of New Mexico, USA (…”

Experimental study of heliothermal processing of municipal solid waste based on solar energy

“…It is advisable to make clear corrections to the data in table 1. In other words, the share of plastics in the composition of MSW has recently increased to 5 -5.5%, and the share of paper has also increased (2 -4%) -food waste varies depending on the season [6][7][8][9][10].…”

“…Here the moisture content of W-MSW,%. As a result of the research, the elemental composition and heat of combustion of MSW were determined and given in Table 3 [7][8][9][10][11][12].…”

Mathematical modeling of greenhouse-livestock complex heated by solar and bioenergy sources

“…A decrease in humidity leads to a sharp decrease in the yield of vegetables and a loss of their marketability. Excessive moisture leads to the production of watery high-quality vegetables and, as a rule, leads to the development of their diseases [6][7].…”

“…To achieve maximum efficiency of biogas formation, anaerobic processing requires certain temperature conditions and technological processes, preferably close to achieving the optimum process [6][7]. The current stage of agricultural construction is characterized by a tendency to expand the greenhouse economy and mobilize everyone, including technical means to increase the productivity of greenhouses.…”