Multi-objective optimization and integration of double effect absorption refrigeration system (DEARS) into Kamojang power plant (PP) to improve plant performance

Agung Satrio Wibowo, Nanang Kurniawan, Nasruddin, Arief Surachman

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Compared with the single effect, the double effect absorption refrigeration system can take advantage of the higher availability (exergy) of high-temperature heat sources to achieve the higher coefficient of performance (COP). This study proposed DEARS as integrated cooling system improve power plant performance. The heat used for ARS heat demand comes from abandoned well. Absorption will be employed to produce a lower temperature of cooling water from the cooling tower and then pass it on the power plant's condenser. A combined exergy and economic analysis of the modeled system is conducted to calculate exergy efficiency and total annual cost of the system. By linking MATLAB with EES properties database, a multi-objective optimization model is formulated using the genetic algorithm to maximize the first objective and minimize the second objective. The temperature of generator, absorber, condenser, evaporator, temperature delta of cooling water of absorption system and throttle valve pressure of power plant are used as decision variables. The results show that the by integration of DEARS, cooling water temperature reduced up to 20°C from 26°C which give an additional power output of 1.5MW. From the optimization, results show that exergy efficiency increases with total annual cost. Finally, the optimum value for each decision variables areare obtained, which is P-throttle valve = 824.38 kPa, dt-cooling water = 3.12°C, T-evaporator = 7.6°C, T-desorber = 120.08°C, T-condenser = 44.9°C, T-absorber = 33.79°C.

Original languageEnglish
Title of host publicationDisruptive Innovation in Mechanical Engineering for Industry Competitiveness
Subtitle of host publicationProceedings of the 3rd International Conference on Mechanical Engineering, ICOME 2017
EditorsVivien S. Djanali, Suwarno, Bambang Pramujati, Volodymyr A. Yartys
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735416994
DOIs
Publication statusPublished - 13 Jul 2018
Event3rd International Conference on Mechanical Engineering, ICOME 2017 - Surabaya, Indonesia
Duration: 5 Oct 20176 Oct 2017

Publication series

NameAIP Conference Proceedings
Volume1983
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference3rd International Conference on Mechanical Engineering, ICOME 2017
CountryIndonesia
CitySurabaya
Period5/10/176/10/17

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