Regenerative air-water heat exchanger with improved heat exchange ability

Abstract

The article describes a power-efficient scheme for using solar energy in centralized heat supply systems that makes it possible to reduce capital and operating costs and increase the degree of substitution of traditional sources of heat. The versatility of systems based on the scheme determines a wide range of their applications: from cottage- type houses to the heating of industrial facilities and greenhouses. The essence of the proposed scheme is that the solar collector for heating medium is switched to the air duct connected to the heated space and an antifreeze substance which circulates in the circuit: storage tank - solar collector. A method of intensifying heat transfer through the use of hole-type intensifiers is proposed. The intensification efficiency is determined by the calculation of daily heat absorption of a flat air collector with the intensification by using holes and without these, the economic effect of the introduction of the proposed method is also determined. According to the calculations, the proposed heating scheme and the intensification of heat transfer on the surface of the collector included in it can provide tangible economic benefits in the implementation.

Method of Efficiency Improvement in District Heating Systems

“…Furthermore, the first place in its implementation in "Energy strategy of Russia for the period until 2030" takes the extension of importance of renewable energy sources in satisfying the energy requirements of the society. Without the adoption of technologies, allowing to force out fossil fuel from the fuel balance of the country, it is impossible to implement basic principles of the strategy, foreseeing the most efficient use of natural energy resources and energy industry potential for the stable growth of economy and improvement of the quality of life of the population of the country (Dostovalova et al, 2014;Goryachikh et al, 2010;Bass and Batukhtin, 2011). Solar energy (Batukhtin et al, 2015b) is the most productive among renewable energy sources for the majority of Russian regions, except regions with wind load parameters sufficient for giving specified rates to wind turbines (10-16 m sec −1 (Li and Zhe Chen, 2008)).…”