Improvement air condensers evaluation model

Svyatoslav Tsibulskiy,Denis Mel'nikov,Nikolay Galashov,Al'bina Bannova,Alexandr Kiselev,G.V. Kuznetsov,E. Bulba,D. Feoktistov

doi:10.1051/matecconf/201819401017

Abstract

The results of analysis of the literature on the calculation of the heat transfer coefficient of an air condenser in the flow past a bundle of finned tubes by an air flow. The methods of calculation are disassembled, marked advantages and disadvantages of each. Calculations of the heat transfer coefficient for each method are given; the results compared with the experimental data.

Highlights

Air condensers (AC) are widely used in a number of foreign TPPs with power units up to 1000 MW and at cycle gas turbines (CCGT)
One of the most serious problems of AC operation in winter during the condensation of water vapor is the condensate freezing in the tubes, which can lead to the destruction of tubes and the need to repair the condenser and stop the turbine
The solution to this problem is to use the AC in a CCGT with three cycles, where the low-boiling substances (LBS) [3] operates in the lower cycle, and its condensation can reliably pass at temperatures below -40 °C [4]

Summary

Introduction

Air condensers (AC) are widely used in a number of foreign TPPs with power units up to 1000 MW and at CCGTs. 2 Methods for calculating the heat transfer coefficient for a bundle of finned tubes 2.1 Method for calculating the heat transfer coefficient for a package of finned tubes of circular cross-section with a chess arrangement, A.I. Kirillov [6].

Results

Conclusion