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Dissertations / Theses on the topic 'District Cooling System'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

VILAFRANCA, MANGUÁN ANA. "Convesion of industrial compression cooling to absorption cooling in an integrated district heating and cooling system." Thesis, University of Gävle, University of Gävle, Department of Technology and Built Environment, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-4145.

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<p>Astra Zeneca plant in Gärtuna has many compression cooling machines for comfort that consume about 11.7 GWh of electricity per year. Many of the cooling machines are old; due to the increase of production of the plant, cooling capacity was limited and new machines have been built. Now, the cooling capacity is over-sized. Söderenergi is the district heating plant that supplies heating to Astra Zeneca plant. Due to the strict environmental policy in the energy plant, last year, a bio-fuelled CHP plant was built. It is awarded with the electricity certificate system.</p><p>The study investigat

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2

Chan, Lok Shun Apple. "Optimisation of piping network design for district cooling system." Thesis, De Montfort University, 2008. http://hdl.handle.net/2086/4109.

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A district cooling system (DeS) is a.scheme for centralised cooling energy distribution which takes advantage of economies of scale and load diversity. . A cooling medium (chilled water) is generated at a central refrigeration plant and then supplied to a district area, comprising multiple buildings, through a closed-loop piping circuit. Because of the substantial capital investment involved, an optimal design of the distribution piping . configuration is one of the crucial factors for successful implementation of a district 1'. cooling scheme. Since there. exists an enormous number of differe

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3

Kang, Di. "Potential advantages of applying a centralized chilled water system to high-density urban areas in China." Kansas State University, 2017. http://hdl.handle.net/2097/35490.

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Master of Science<br>Department of Architectural Engineering and Construction Science<br>Fred L. Hasler<br>This paper discusses the advantages of applying a utility centralized chilled water system as the district cooling choice for facilities in the high-density urban areas of China and how it will influence China’s development in the next decades. Presently, the Chinese government is trying to contribute to the world’s energy-saving goals as well as determine its sustainable development framework. As air pollution has become one of the main problems in China, indoor air quality (IAQ) is lik

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4

Xu, Chen. "Hydraulic modeling of large district cooling systems for master planning purposes." Texas A&M University, 2003. http://hdl.handle.net/1969.1/5862.

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District Cooling Systems (DCS) have been widely applied in large institutions such as universities, government facilities, commercial districts, airports, etc. The hydraulic system of a large DCS can be complicated. They often stem from an original design that has had extensive additions and deletions over time. Expanding or retrofitting such a system involves large capital investment. Consideration of future expansion is often required. Therefore, a thorough study of the whole system at the planning phase is crucial. An effective hydraulic model for the existing DCS will become a powerful ana

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5

Le, Alex. "An economic comparison between two district cooling systems in Halmstad." Thesis, Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-25752.

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The supply of cooling has increased significantly in recent years, the trend shows that the increase will continue one reason is that the standard of living has increased, but EU has also set a requirement that energy consumption must be better at the same time. With “better” means more efficient and environmentally friendly. District cooling today uses either chillers or naturally available cold sources such as deep sea water, lake water or cold air. Cold air is, of course, only available when the seasons permit it and the cold air is not available when comfort cooling is needed for e.g. offi

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6

Kamal, Majd. "Potential for low temperature district heating system : Integrating 4th generation district heating system with existing technology." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-35816.

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This project presents a feasibility study and an investigation of the potential for low temperature district heating system in Västerås. The investigation treats integrations possibilities for 4GDH (4th Generation District Heating) in Kungsängens area in Västerås, which is undergoing a large-scale building-up and construction. The study is conducted for the company Mälarenergi AB. The advantages of 4GDH technology are identified and analyzed, where energy effectiveness and economic benefits aspects were concluded. Problems with existing technology and higher cooling demand expectations drive

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7

Calance, Marius Alexandru. "Energy Losses Study on District Cooling Pipes : Steady-state Modeling and Simulation." Thesis, Högskolan i Gävle, Avdelningen för bygg- energi- och miljöteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-18490.

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Distributionsförluster är en viktig faktor i fjärrenergisystem. Genom att optimera förluster i sådana system, kan både ekonomiska och miljömässiga aspekter uppfyllas. Tyvärr finns det ringa information om rörförluster i fjärrkylasystem. Föreliggande studie fokuserar på förluster i ett fjärrkylanät genom att både använda ett R-nätverk och FEM simuleringsmodeller. Ett R-nätverksmodell bestående av termiska konduktanser har utvecklats genom analytiska ekvationer och simuleringar med FEM har utfört för validering av modellen. Därefter har ett fjärrkylanätverk som konstrueras i Gävle, analyserats.

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8

Lo, Anthony. "Optimizing the cost and energy performance of district cooling system with the low delta-T syndrome." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/68282/.

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Almost every chilled water system is affected by the low delta-T syndrome in which the supply and return chilled water temperatures falls short of the design level, particularly at low loads. This results in inefficient chillers and higher energy consumption of the chiller plant. This research is aimed at designing a district cooling system (DCS) that can accommodate the low delta-T problem and minimize its impact on the DCS’ energy performance. Methodologies were developed to minimize DCS energy consumption and running cost, particularly those related to the chiller plant and pumping station.

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9

Djuric, Ilic Danica. "With district heating toward a sustainable future : System studies of district heating and cooling that interact with power, transport and industrial sectors." Doctoral thesis, Linköpings universitet, Energisystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-106899.

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The aim of this thesis is to identify measures which should be taken in DH systems (DHSs) in order to contribute to the development of the DHSs and other energy systems (especially transport, industrial and power sectors) toward sustainability. Four business strategies were analysed: delivering excess heat from biofuel production industry to DHSs, conversion of industrial processes to DH, integration of biofuel production in DHSs and integration of DHdriven absorption cooling technology in DHSs. Delivering excess heat from biofuel production industry to DHSs was analysed with a focus on the bi

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10

Östlin, Robert. "Lämplighetsundersökning av olika system för att producera kyla : Fallstudie för en fastighet med bageri, restaurang och kontor." Thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-32530.

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Kyla produceras med ett antal helt skilda metoder. Denna rapport och fallstudie tar hänsyn till fyra metoder för kylning, kompressordriven-, absorptions-, fri-, och fjärrkyla. En del i problematiken är att systemen har mycket olika tekniska utformningar och krav på fastigheten, så som geografi och närhet till stora tekniska system som fjärrvärme och fjärrkyla. Kylsystemen jämfördes för att finna vilket kylsystem som var lämpligast samt vilket som hade den mest gynnsamma taxeringen för fastigheten. Kylsystemens lämplighet bedömdes framförallt efter underhållsbehov, men även storlek och ljudnivå

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11

SARASKETA, ZABALA ELIXABET. "Technological and economic evaluation of district cooling with absorption cooling systems in Gävle (Sweden)." Thesis, University of Gävle, Ämnesavdelningen för energi- och maskinteknik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-4762.

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12

Nova, Rincón Arley Fernando. "Dynamic optimization of a district cooling distribution network." Thesis, Pau, 2019. http://www.theses.fr/2019PAUU3020.

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L’utilisation de froid (industriel et climatisation) dans le monde ne cesse d’augmenter et les prévisions annoncent un accroissement continu de la demande de froid dans les années à venir. De ce fait, la recherche d’un moyen fiable et performant permettant la fourniture de froid est plus que jamais d’actualité. Dans ce contexte, les réseaux de froid urbains sont de plus en plus étudiés. Actuellement, la plupart des études portant sur la simulation numérique ou l’optimisation de ces systèmes ont été mises en œuvre en régime stationnaire. Compte tenu de cela, le présent manuscrit propose une mét

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13

Chou, Lu-chien. "Drag reducing cationic surfactant solutions for district heating and cooling systems /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487758178238587.

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14

Lindmark, Susanne. "The role of absorption cooling for reaching sustainable energy systems." Licentiate thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-319.

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15

Kamali, Aslan. "Developing a Decision Making Approach for District Cooling Systems Design using Multi-objective Optimization." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-208228.

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Energy consumption rates have been dramatically increasing on a global scale within the last few decades. A significant role in this increase is subjected by the recent high temperature levels especially at summer time which caused a rapid increase in the air conditioning demands. Such phenomena can be clearly observed in developing countries, especially those in hot climate regions, where people depend mainly on conventional air conditioning systems. These systems often show poor performance and thus negatively impact the environment which in turn contributes to global warming phenomena. In r

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16

Carreras, Bertran Antoni. "Energy System and Economic Analysis of District coolingin the city hall of Gävle." Thesis, Högskolan i Gävle, Akademin för teknik och miljö, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-15463.

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17

Bäcklund, Johannes. "Energieffektivisering av fjärrvärme- och fjärrkylanätet på campus i Umeå : Energy efficiency of the district heating and cooling systems on campus in Umeå." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-148393.

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Detta examensarbete utfördes på uppdrag av Akademiska Hus som äger och förvaltar fastigheterna på campus i Umeå. Projektet bestod av att utifrån en övergripande bild på det interna fjärrvärme- och fjärrkylanätet på campus, ta fram alternativa utformningar på systemet i syfte om att göra det mer energieffektivt. Systemets interna fjärrvärme- och fjärrkylanät VP100 och KB100 växlar över värme och kyla från Umeå Energi som sedan distribueras vidare till fjärrvärme- och fjärrkylacentraler på campus. Några av centralerna har egenproduktion där returledningen från KB100 går till en värmepump som pro

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18

Smith, Bryan C. "Flow birefringence, nuclear magnetic resonance and corrosion measurements on drag reducing cationic surfactant solutions for district heating and cooling systems /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487780865409286.

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19

Kamali, Aslan [Verfasser], Clemens [Akademischer Betreuer] Felsmann, and Nazar [Gutachter] Antwan. "Developing a Decision Making Approach for District Cooling Systems Design using Multi-objective Optimization / Aslan Kamali ; Gutachter: Nazar Antwan ; Betreuer: Clemens Felsmann." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://d-nb.info/1114067911/34.

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20

Chen, Ming-Yi, and 陳明義. "Energy saving analysis of buildings cooling district energy system." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/px2jf4.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系碩士班<br>103<br>In Taiwan often due to different ownership, air-conditioning systems are usually separately installed for buildings, zones, and floors. There the air-conditioning systems have to meet the separately cooling and heating schedules even the buildings are in the vicinity of each other. The design of district energy center so that a central system can supply a group of buildings is rather rare. The research of this thesis primarily focuses on energy saving by replacing the chillers of a building group of three that belong to a corporation, situated in a

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21

(9741170), Akshay Satish Dalvi. "INTEGRATED SYSTEM ARCHITECTURE DEVELOPMENT AND ANALYSIS FRAMEWORK APPLIED TO A DISTRICT COOLING SYSTEM." Thesis, 2021.

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<div>The internal and external interactions between the complex structural and behavioral characteristics of the system of interest and the surrounding environment result in unpredictable emergent behaviors. These emergent behaviors are not well understood, especially when modeled using the traditional top-down systems engineering approach. The intrinsic nature of current complex systems has called for an elegant solution that provides an integrated framework in Model-Based Systems Engineering. A considerable gap exists to integrate system engineering activities and engineering analysis, which

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22

Dalvi, Akshay Satish. "Integrated System Architecture Development and Analysis Framework Applied to a District Cooling System." Thesis, 2020. http://hdl.handle.net/1805/24784.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>The internal and external interactions between the complex structural and behavioral characteristics of the system of interest and the surrounding environment result in unpredictable emergent behaviors. These emergent behaviors are not well understood, especially when modeled using the traditional top-down systems engineering approach. The intrinsic nature of current complex systems has called for an elegant solution that provides an integrated framework in Model-Based Systems Engineering. A considerable gap exists to integrate

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23

Bannerman, Andrew. "Economic evaluation of a district cooling system incorporating thermal storage." Thesis, 2003. http://hdl.handle.net/10413/4295.

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The following report investigates district cooling systems. This form of technology provides an alternative means of providing cooling. In a traditional cooling system each building would include cooling equipment to serve only that building. District cooling differs in that water is chilled at one location and pumped to two or more buildings. District cooling has many benefits over traditional cooling systems. This report, however, aims to determine the economic benefits (if any) of district cooling systems. The location chosen as a model for this study was the University of

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24

Ting, Mu-Min, and 丁木敏. "The Design Analysis and Operation Evaluation of District Cooling System." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/76717338968899761470.

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博士<br>國立中山大學<br>機械工程學系<br>88<br>The economic boom in Taiwan has caused a strong demand in electricity consumption. The statistics show that over 40%~50% on- peak power is consumed by the HVAC systems in commercial buildings. Since 93% of total energy consumed in the nation is imported, a district cooling system is considered as an effective strategy to save energy and to reduce CO2 emission as well. It is the goal of this study to design and construct a district cooling system on main campus of the National Kaohsiung First University of Science and Technology for demonstration. The

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25

Lee, Ching-Chun, and 李清圳. "Design and Application of Energy-Saving Chilled Water System for District Cooling." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/z8ezw4.

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碩士<br>國立臺北科技大學<br>冷凍空調工程系所<br>93<br>The purpose of this research is to apply the district cooling system in the block-type buildings as a research model that uses primary/ secondary piping system application in this HVAC system. Simulate three kinds of processes for chilling water system running modes in sub-piping systems respectively. Furthermore, we utilize the computerizing analysis for several types of running modes on power consumption analysis in this system and to get the comparisons of total energy usage efficiency of those chilling piping systems. The results from computerizing analy

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26

Su, Hung-Change, and 蘇鴻昌. "A Study and Simulation of Energy Saving for Large Scale Buildings Using District Cooling System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/9g9n5e.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系碩士班<br>96<br>The district cooling system usually supplied chilled water with Primary-Secondary System. This research analyzes the design of the district cooling system for large-scale construction and compares it with the traditional system. We simulate three kinds of secondary chilled water supply mode by the software DOE-2 and choose the best case. The results show the district cooling system could save 13% capacity of the traditional independent one. In the water side, the secondary/boost water pump system has the best energy efficiency. Compared with the common-

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27

Zurhausen, Daniel, and Daniel Zurhausen. "Development of the First District Cooling System Combined with a Large Combined Cycle Power Plant to Increase its Thermal Efficiency." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/rds3c2.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>106<br>Almost all regions around the globe face a significant increase in usage of air-conditioning. Driven by rising incomes and related demand for higher quality of living in developing countries | but not limited to them | some regions need to handle a significant growth of electricity consumption for cooling purposes up to six times higher than it is to date. Energy efficient solutions are required to keep the environmental impact as small as possible. Utility operators identified district cooling as such, which - amongst other benefits - can reduce electricity c

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28

Lai, Ching-Hsien, and 賴靜仙. "Optimization Design of a District Heating and a District Cooling System Using Waste Heat Recovery from Power Plants on Isolated Island and Feasibility Assessment of Energy Savings Performance Contracts." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/48587338181896303602.

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博士<br>國立臺灣大學<br>機械工程學研究所<br>103<br>This dissertation numerically investigates the optimization design of a district heating and cooling system using waste heat recovery from the diesel generators of power plants on an isolated island and the feasibility assessment of energy savings performance contracts (ESPC) with energy-savings project. Firstly, the mathematical models of the hourly available waste heat for systems and the power consumption of systems are developed. In consideration of both parties, the power company and the energy service company (ESCO), the ESPC of energy-savings project i

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29

Powell, Kody Merlin. "Dynamic optimization of energy systems with thermal energy storage." 2013. http://hdl.handle.net/2152/21590.

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Thermal energy storage (TES), the storage of heat or cooling, is a cost-effective energy storage technology that can greatly enhance the performance of the energy systems with which it interacts. TES acts as a buffer between transient supply and demand of energy. In solar thermal systems, TES enables the power output of the plant to be effectively regulated, despite fluctuating solar irradiance. In district energy systems, TES can be used to shift loads, allowing the system to avoid or take advantage of peak energy prices. The benefit of TES, however, can be significantly enhanced by dynamical

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中原, 信生, 雄三坂本, 覚. 久野 та ін. "地球環境保全型建築・都市の環境・エネルギ-システムに関する研究". 1995. http://hdl.handle.net/2237/13007.

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