Heat transfer analysis for ammonia-water mixture heat exchanger for organic rankine cycle of an energy recovery system / Nur Hidayah Mohd Razif

Transportation is one of the largest energy consumers and the biggest contribution is dominated by the internal combustion engine (ICE). The performance efficiency of the ICE is 30 % for gasoline and 45 % for diesel with almost 65 % of the combusted energy is wasted through the exhaust gas. This exh...

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Main Author:	Mohd Razif, Nur Hidayah
Format:	Thesis
Language:	English
Published:	2017
Subjects:	Transmission Heat transfer Thermal conductivity
Online Access:	https://ir.uitm.edu.my/id/eprint/37320/1/37320.pdf
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id	my-uitm-ir.37320
record_format	uketd_dc
spelling	my-uitm-ir.373202022-11-01T07:35:01Z Heat transfer analysis for ammonia-water mixture heat exchanger for organic rankine cycle of an energy recovery system / Nur Hidayah Mohd Razif 2017 Mohd Razif, Nur Hidayah Transmission. Heat transfer Thermal conductivity Transportation is one of the largest energy consumers and the biggest contribution is dominated by the internal combustion engine (ICE). The performance efficiency of the ICE is 30 % for gasoline and 45 % for diesel with almost 65 % of the combusted energy is wasted through the exhaust gas. This exhaust gas is classified as a low grade energy thus recovering it is very challenging. A reliable and feasible recovering system is required to recover this kind of energy. In this study, Organic Rankine Cycle (ORC) is adopted to the powertrain system in order to increase the thermal efficiency. This study evaluates the performance of a condenser that is using ORC in order to achieve 3 kW of heat load. The condenser is also incorporated with ammonia-water mixture as the working fluid to maximize the heat transfer performance. The study focused on characterization of ammonia-water mixture by its thermo- physical properties. In this study, the characterization of ammonia-water mixtures was divided by mol fraction spanning from 0.05 mol to 0.3 mol. The mixtures were identified with six concentration levels which are 5:95, 10:90, 15:85, 20:80, 25:75 and 30:70. The thermo-physical properties of these mixtures, which includes specific heat capacity, thermal conductivity, dynamic viscosity and density, were measured. The test bench was then designed and fabricated according to the specification and limitation of the mixture. Design operating condition was established by obtaining a suitable mass flow rate using the ORC calculation with 25 % and 70 % of thermal and turbine efficiency; respectively. Based on the theoretical thermodynamic calculation, 3 kW heat load was achieved by 36 extruded finned tubes combined with air-cooled condenser design. It was found from the experimentation value that the highest condenser of heat load was only 2 kW at 0.3 mol fraction with 17 % of thermal efficiency. A rapid vaporization of the ammonia was found to be the main factor of the low thermal efficiency. 2017 Thesis https://ir.uitm.edu.my/id/eprint/37320/ https://ir.uitm.edu.my/id/eprint/37320/1/37320.pdf text en public masters Universiti Teknologi MARA (UiTM) Faculty of Mechanical Engineering Mamat, Aman Mohd Ihsan
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Mamat, Aman Mohd Ihsan
topic	Transmission Heat transfer Thermal conductivity
spellingShingle	Transmission Heat transfer Thermal conductivity Mohd Razif, Nur Hidayah Heat transfer analysis for ammonia-water mixture heat exchanger for organic rankine cycle of an energy recovery system / Nur Hidayah Mohd Razif
description	Transportation is one of the largest energy consumers and the biggest contribution is dominated by the internal combustion engine (ICE). The performance efficiency of the ICE is 30 % for gasoline and 45 % for diesel with almost 65 % of the combusted energy is wasted through the exhaust gas. This exhaust gas is classified as a low grade energy thus recovering it is very challenging. A reliable and feasible recovering system is required to recover this kind of energy. In this study, Organic Rankine Cycle (ORC) is adopted to the powertrain system in order to increase the thermal efficiency. This study evaluates the performance of a condenser that is using ORC in order to achieve 3 kW of heat load. The condenser is also incorporated with ammonia-water mixture as the working fluid to maximize the heat transfer performance. The study focused on characterization of ammonia-water mixture by its thermo- physical properties. In this study, the characterization of ammonia-water mixtures was divided by mol fraction spanning from 0.05 mol to 0.3 mol. The mixtures were identified with six concentration levels which are 5:95, 10:90, 15:85, 20:80, 25:75 and 30:70. The thermo-physical properties of these mixtures, which includes specific heat capacity, thermal conductivity, dynamic viscosity and density, were measured. The test bench was then designed and fabricated according to the specification and limitation of the mixture. Design operating condition was established by obtaining a suitable mass flow rate using the ORC calculation with 25 % and 70 % of thermal and turbine efficiency; respectively. Based on the theoretical thermodynamic calculation, 3 kW heat load was achieved by 36 extruded finned tubes combined with air-cooled condenser design. It was found from the experimentation value that the highest condenser of heat load was only 2 kW at 0.3 mol fraction with 17 % of thermal efficiency. A rapid vaporization of the ammonia was found to be the main factor of the low thermal efficiency.
format	Thesis
qualification_level	Master's degree
author	Mohd Razif, Nur Hidayah
author_facet	Mohd Razif, Nur Hidayah
author_sort	Mohd Razif, Nur Hidayah
title	Heat transfer analysis for ammonia-water mixture heat exchanger for organic rankine cycle of an energy recovery system / Nur Hidayah Mohd Razif
title_short	Heat transfer analysis for ammonia-water mixture heat exchanger for organic rankine cycle of an energy recovery system / Nur Hidayah Mohd Razif
title_full	Heat transfer analysis for ammonia-water mixture heat exchanger for organic rankine cycle of an energy recovery system / Nur Hidayah Mohd Razif
title_fullStr	Heat transfer analysis for ammonia-water mixture heat exchanger for organic rankine cycle of an energy recovery system / Nur Hidayah Mohd Razif
title_full_unstemmed	Heat transfer analysis for ammonia-water mixture heat exchanger for organic rankine cycle of an energy recovery system / Nur Hidayah Mohd Razif
title_sort	heat transfer analysis for ammonia-water mixture heat exchanger for organic rankine cycle of an energy recovery system / nur hidayah mohd razif
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Mechanical Engineering
publishDate	2017
url	https://ir.uitm.edu.my/id/eprint/37320/1/37320.pdf
_version_	1783734415536422912

Heat transfer analysis for ammonia-water mixture heat exchanger for organic rankine cycle of an energy recovery system / Nur Hidayah Mohd Razif

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