# THE CONTACT-SURFACE HEAT UTILIZER

2020;
: 46-50
1
Lviv Polytechnic National University
2
Lviv Polytechnic National University
3
Lviv Polytechnic National University
4
Lviv Polytechnic National University, Department of Heat and Gas Supply and Ventilation
5
Lviv Polytechnic National University, Department of Heat and Gas Supply and Ventilation

In industry contact-surface heat exchangers are used. Deep chilling of burning products is realised in these apparatuses (30–40 oC). At calculation of contact-surface heat exchangers the transfer coefficient of full heat for nozzle chamber s against of determinative factors both for contact part and for irrigated surface heat exchangeris the most important. It may be obtained by several methods. By this there is difficulty at choice of the most effective method, which would provide high accuracy of this value calculation and also would not be too complicated.

The aim of this article is choice of the most rational schemes of heat utilization equipment composition for the endogas burning products heat utilization and design of engineering method of this equipment calculation. The dependencies obtained are quite simple, easy to use and give good consistency of the results. An effective method of determination of the full heat transfer coefficient for nozzle chamber in contact heat exchangers at any given output values at the specified interval, which makes it possible to conduct calculations both graphically and analytically, is proposed. In this article there is proposed method of value s calculation for contact-surface heat exchangers, which corresponds both conditions described above. Method of numeral integration is chosen as a base. It allows to calculate an value s with the highest accuracy. Value sis presented as function against 4 independent arguments. Obtained results are presented as a chart, which is approximated by an equation. Thus, we assert that effective method for calculation of the transfer coefficient of full heat for nozzle chamber in contact-surface heat exchangers, which are used for common and technological hot-water supply, is composed.

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