ANALYTICAL STUDY OF THERMODYNAMIC
AND TRANSPORT PROPERTIES OF DIFFERENT
REFRIGERANTS THAT INFLUENCE THE ORGANIC
RANKINE CYCLE PERFORMANCE

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ITS » Master Theses » Rekayasa Konversi Energi - S2
Posted by iwan_jnt@its.ac.id at 08/04/2010 09:10:34 • 1203 Views

ANALYTICAL STUDY OF THERMODYNAMIC AND TRANSPORT PROPERTIES OF DIFFERENT REFRIGERANTS THAT INFLUENCE THE ORGANIC RANKINE CYCLE PERFORMANCE

ANALYTICAL STUDY OF THE THERMODYNAMIC AND TRANSPORT PROPERTIES OF DIFFERENT REFRIGERANTS THAT INFLUENCE THE PERFORMANCE OF AN ORGANIC RANKINE CYCLE

Created by :
ODHIAMBO, MESHACK OTEDO ( 2106 202 702 )

Subject:	Rankine cycle
Alt. Subject :	Siklus Rankine
Keyword:	Siklus Rankine Organik Refrigeran Sifat-sifat Termodinamika Transport Panas terbuang

[ Description ]

Kemampuan refrigeran yang digunakan sebagai fluida kerja di siklus Rankine Organik untuk menghasilkan energi listrik telah dilakukan oleh banyak para peneliti sebelumnya dan informasi yang cukup banyak telah diterbitkan tentang performan system dengan menggunakan berbagai jenis refrigeran. Penelitian ini bertujuan untuk menganalisi pengaruh sifat-sifat termodinamika dan transport dari refrigeran yang berpengaruh pada hasil kerja siklus Rankine Organik. Penelitian ini dilakukan dengan menganalisi performan komponen-komponen dan siklus Rankine Organik secara keseluruhan dengan dasar siklus ideal dari berbagai jenis refrigeran yang diteliti. Kontribusi sifat-sifat termodinamika dan transport terhadap performan komponen-komponen dan system lalu dibandingkan. Densitas refrigeran yang tinggi didapatkan menurunkan debit yang dibutuhkan dan daya pompa yang akhirnya menurunkan ukuran peralatan yang dibutuhkan. Kondaktivitas termal yang tinggi mengurangi perbedaan temperature yang dibutuhkan antara sumber panas dan fluida agar ada laju perpindahan panas; panas penguapan yang tinggi meningkatkan laju panas yang diserap oleh fluida kerja yang menghasilkan enthalpi besar pada keluaran evaporator, dan viskositas refrigeran sebaiknya tetap rendah dengan perubahan temperatur. Kekurangannya adalah tidak ada satu jenis refrigeran yang mempunyai semua sifat-sifat tersebut jadi pemilihan fluida kerja harus besertakan status sumber panas termasuk nilai panas dari sumbernya, laju maximal dari sumber panas dan berapa lama sumber panas bisa dipakai.

Alt. Description

The capability of refrigerants being used as working fluids in the Organic Rankine Cycle for production of electrical energy has been carried out by many researchers in the past and ample information has been put forward in terms of the performance of the system with various refrigerants. This research has the objective of analyzing the influence of the transport and thermodynamic properties of the refrigerants on the performance of the Organic Rankine Cycle. The research was carried out by analyzing the performance of the system components and the overall Organic Rankine Cycle based on the ideal cycles of the various working fluids under investigation. Contributions of the transport and thermodynamic properties of the working fluids towards the performance of the components and the system were then compared. A high refrigerant density was found to reduce the volumetric flow rate required and the pump energy consumption and so reduces the size of the equipment required. A high thermal conductivity reduces the temperature difference required for heat transfer to take place between the fluid and the heat source, a high enthalpy of vaporization increases the amount of heat taken by the working fluid thus a high enthalpy at turbine entry and the viscosity of the refrigerant should remain low with temperature elevation. But no single working fluid possesses all these characteristics, thus the choice of the most appropriate fluid has also to consider the state of the heat source like heat available, flow rate achievable and the lifespan.

Contributor	:	Dr. Eng. Prabowo, M. Eng.
Date Create	:	08/04/2010
Type	:	Text
Format	:	Pdf
Language	:	Indonesian
Identifier	:	ITS-Master-3100010037442
Collection ID	:	3100010037442
Call Number	:	RTM 621.1 Odh a

Source :
Mechanical Engineering, RTM 621.1 Odh a, 2009

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