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Pre-design Latent Heat Thermal Energy Storage using Energy from Electricity Grid

Wan Mohd Hariri B. Mohd Nasihuddin, Wan Mohd Hariri (2009) Pre-design Latent Heat Thermal Energy Storage using Energy from Electricity Grid. Universiti Teknologi Petronas, Sri Iskandar,Tronoh,Perak. (Unpublished)

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Universiti Teknologi Petronas currently uses Gas District Cooling (UTP GDC) as cooling system in the university. UTP GDC system stores chilled water thermal energy storage and using electricity generated from gas turbine. The current set up is using huge volume of tank storage and high capacities of equipments then lead to high operation cost. Based on previous research, there is still room of improvement for UTP air conditioning system. In this project, the chilled water thermal energy storage will be replaced with ice thermal energy storage and the gas turbine as electricity generator will be replaced with direct electricity from the Tenaga Nasional Berhad grid. The basic principle of this project is the chillers only run during the off-peak rate to charge the storage tank for day use. It is to minimize the operating cost. For that purpose, 37100 RTh cooling load needs to be stored. By using ice, the volume of tank storage can be reduced to 2700m3. Existing tank needs to undergo several modifications to store ice. For ice storage, it will contain 3 297 700 nodules AC.00. In order to ensure sufficient storage for the system, 6 brine chillers are used to replace existing 4 electric chillers and 2 steam absorption chillers. Chillers will be operating for 11 hours during the off-peak rate while the existing chillers are running 24 hours. The system is going to use four pumps. Each pump consists of 210 kW. Heat exchanger capacity is 29700 kW. Economic analysis and design justifications are done to ensure the feasibility of the project. Based on operation and maintenance cost analysis, this project can save a lot of money for each month of operation. The saving is at least about RM 100000 per month and value of energy per unit volume increases 13 times from the existing design. Other design justifications are environmental protection and high reliability. All of those justifications prove that this project is viable to develop.

Item Type: Final Year Project
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Users 5 not found.
Date Deposited: 11 Jan 2012 12:24
Last Modified: 25 Jan 2017 09:44
URI: http://utpedia.utp.edu.my/id/eprint/685

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