Thermodynamic analysis and optimization of a high temperature triple absorption heat transformer.

Mehrdad Khamooshi,Saeed Babadi,Mortaza Yari,Kiyan Parham,Hana Salati,Fuat Egelioglu

doi:10.1155/2014/980452

Abstract

First law of thermodynamics has been used to analyze and optimize inclusively the performance of a triple absorption heat transformer operating with LiBr/H2O as the working pair. A thermodynamic model was developed in EES (engineering equation solver) to estimate the performance of the system in terms of the most essential parameters. The assumed parameters are the temperature of the main components, weak and strong solutions, economizers' efficiencies, and bypass ratios. The whole cycle is optimized by EES software from the viewpoint of maximizing the COP via applying the direct search method. The optimization results showed that the COP of 0.2491 is reachable by the proposed cycle.

Highlights

Pollution, carbon dioxide production, environmental hazards, and global warming are the main disadvantages of fossil fuels
The results showed that the double effect absorption heat transformers (DAHTs) had higher exergy and energy efficiencies and smaller water production than that of the single effect absorption heat transformers (SAHT)
For smaller amounts of BP1 and higher quantities of BP2. This means that the temperature of the point 29 will become higher with considered amounts of bypass ratios which leads to increasing heat recovery in the third heat exchanger

Summary

Introduction

Carbon dioxide production, environmental hazards, and global warming are the main disadvantages of fossil fuels. Alternative choices which can assist decision makers to avoid using fossil fuels have become a big challenge nowadays. Absorption heat transformers which are capable of upgrading the energy efficiency of industrial applications appear to be a noble choice for utilizing these waste heats. They are systems that operate in a cycle opposite to that of absorption heat pumps (AHPs). Due to the fact that the fundamental of the AHTs is close to AHPs, absorption heat transformers will have the same advantages of the absorption systems such as quite operation, less maintenance requirement, less mechanical work input, and simple design [1,2,3,4,5,6,7]

Methods

Results

Conclusion