Analysis of energy characteristics of absorption water-ammonia refrigeration machines in the waste heat recovery systems of gas turbine installations on gas main pipelines

Authors

DOI:

https://doi.org/10.15587/2312-8372.2019.183853

Keywords:

water-ammonia absorption chillers, waste heat, energy efficiency, natural gas pre-cooling, main gas pipelines

Abstract

One of the promising ways to reduce operating losses in main gas pipelines is pre-cooling of compressed gas using heat-using absorption water-ammonia refrigeration machines (AWRM), which utilize the waste heat of the exhaust products of the combustion of gas pumping units. The object of research is the energy characteristics of the AWRM in a wide range of operating parameters (outdoor temperatures), which are currently not studied. A methodology for modeling AWRM modes is developed, analytical studies are conducted and the results are obtained in a wide range of outdoor temperatures.

The study is conducted using theoretical analysis of AWRM cycles in a wide range of outdoor temperatures and temperatures of the cooling object. The analysis of the calculation results showed that in the range of design parameters there is a maximum energy efficiency AWRM. The most obvious is the presence of a maximum for operating conditions at cooling medium temperatures of 20…32 °С and low temperatures of the cooling object (minus 25 °С). As the temperature of the cooling object decreases, the maximum energy efficiency shifts to the region of high temperatures of the heating medium, and its numerical values decrease. At heating source temperatures from 90 °С to 130 °С, the electric power of the circulation pump has a maximum value. Subsequently, with an increase in the temperature of the heating source, its asymptotic decrease and slow decrease are observed. In this case, the greatest changes occur at elevated temperatures of the cooling medium (32 °С).

The simulation results allow to determine the most energy-efficient operating modes of the AWRM with various sources of thermal energy (temperatures from 90 to 160 °С) and to develop cooling systems for a wide temperature range (minus 30…15 °С). To achieve such optimal conditions, an appropriate combination of the composition of the working fluid and the temperature of the heating source is necessary.

Author Biographies

Alexander Titlov, Odessa National Academy of Food Technologies, 112, Kanatna str., Odessa, Ukraine, 65039

Doctor of Technical Sciences, Professor, Head of Department

Department of Heat-and-Power Engineering and Oil-and-Gas Transportation and Storing

Oleg Vasyliv, Odessa National Academy of Food Technologies, 112, Kanatna str., Odessa, Ukraine, 65039

PhD, Associate Professor

Department of Heat-and-Power Engineering and Oil-and-Gas Transportation and Storing

Alnamer Abdelkader, Odessa National Academy of Food Technologies, 112, Kanatna str., Odessa, Ukraine, 65039

Postgraduate Student

Department of Heat-and-Power Engineering and Oil-and-Gas Transportation and Storing

Alexey Morozov, Odessa National Academy of Food Technologies, 112, Kanatna str., Odessa, Ukraine, 65039

Department of Heat-and-Power Engineering and Oil-and-Gas Transportation and Storing

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Published

2019-07-25

How to Cite

Titlov, A., Vasyliv, O., Abdelkader, A., & Morozov, A. (2019). Analysis of energy characteristics of absorption water-ammonia refrigeration machines in the waste heat recovery systems of gas turbine installations on gas main pipelines. Technology Audit and Production Reserves, 5(1(49), 36–40. https://doi.org/10.15587/2312-8372.2019.183853

Issue

Vol. 5 No. 1(49) (2019): Industrial and technology systems

Section

Reports on research projects

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Copyright (c) 2019 Alexander Titlov, Oleg Vasyliv, Alnamer Abdelkader, Alexey Morozov

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