Development Of A Prototype Thermoelectric Space Cooling System Using Phase Change Material To Improve The Performance

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Development of a Prototype Thermoelectric Space Cooling System Using Phase Change Material to Improve the Performance

Author : Dongliang Zhao
Publisher :
ISBN 13 : 9781321175059
Total Pages : 152 pages
Book Rating : 4.1/5 (75 download)

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Book Synopsis Development of a Prototype Thermoelectric Space Cooling System Using Phase Change Material to Improve the Performance by : Dongliang Zhao

Download or read book Development of a Prototype Thermoelectric Space Cooling System Using Phase Change Material to Improve the Performance written by Dongliang Zhao and published by . This book was released on 2014 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thermoelectric cooling system has advantages over conventional vapor compression cooling devices, including compact in size, light in weight, high reliability, no mechanical moving parts, no refrigerant, being powered by direct current, and easily switching between cooling and heating modes. However, it has been long suffering from its relatively high cost and low energy efficiency, which has restricted its usage to niche applications, such as space missions, portable cooling devices, scientific and medical equipment, where coefficient of performance (COP) is not as important as reliability, energy availability, and quiet operation environment. Enhancement of thermoelectric cooling system performance generally relies on two methods: improving thermoelectric material efficiency and through thermoelectric cooling system thermal design. This research has been focused on the latter one. A prototype thermoelectric cooling system integrated with phase change material (PCM) thermal energy storage unit for space cooling has been developed. The PCM thermal storage unit used for cold storage at night, functions as the thermoelectric cooling system's heat sink during daytime's cooling period and provides relatively lower hot side temperature for the thermoelectric cooling system. The experimental test of the prototype system in a reduced-scale chamber has realized an average cooling COP of 0.87, with the maximum value of 1.22. Another comparison test for efficacy of PCM thermal storage unit shows that 35.3% electrical energy has been saved from using PCM for the thermoelectric cooling system. In general, PCM faces difficulty of poor thermal conductivity at both solid and liquid phases. This system implemented a finned inner tube to increase heat transfer during PCM charging (melting) process that directly impacts thermoelectric system's performance. A simulation tool for the entire system has been developed including mathematical models for a single thermoelectric module, for the thermoelectric cooling unit, for the PCM thermal storage unit, and for the outdoor air-water heat exchanger. When modeling PCM thermal storage unit, the enthalpy method has been adopted. Since natural convection has been observed in experiments playing a key effect on heat transfer in PCM, a staged effective thermal conductivity ( k[subscript] e ) concept and modified Rayleigh (Ra ) number formula have been developed to better capture natural convection's variable effects during the PCM charging process. Therefore, a modeling-based design procedure for thermoelectric cooling system integrating with PCM has been proposed. A case study has been completed for a model office room to demonstrate the qualitative and quantitative evaluations to the major system components. Results of this research can be extended to other applications in relevant areas. For instance, the proposed PCM thermal storage unit can be applied to integration with water-cooled conventional air-conditioning devices. Instead of using water cooling, a case study of using the proposed PCM unit for a water-cooled air-conditioner shows a COP increase of more than 25.6%.

Energy Solutions to Combat Global Warming

Author : XinRong Zhang
Publisher : Springer
ISBN 13 : 331926950X
Total Pages : 852 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis Energy Solutions to Combat Global Warming by : XinRong Zhang

Download or read book Energy Solutions to Combat Global Warming written by XinRong Zhang and published by Springer. This book was released on 2016-10-17 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers an in-depth collection of 45 selected papers presented at the Global Conference on Global Warming 2014 in Beijing, China, covering a broad variety of topics from the main principles of thermodynamics and their role in design, analysis, and the improvements in performance of energy systems to the potential impact of global warming on human health and wellbeing. Given energy production’s role in contributing to global warming and climate change, this work provides solutions to global warming from the point of view of energy. Incorporating multi-disciplinary expertise and approaches, it provides a platform for the analysis of new developments in the area of global warming and climate change, as well as potential energy solutions including renewable energy, energy efficiency, energy storage, hydrogen production, CO2 capture and environmental impact assessment. The research and analysis presented herein will benefit international scientists, researchers, engineers, policymakers and all others with an interest in global warming and its potential solutions.

Development of an Experimental and Analytical Model of an Active Cooling Method for High-power Three- Dimensional Integrated Circuit (3D-IC) Utilizing Multidimensional Configured Thermoelectric Modules

Download Development of an Experimental and Analytical Model of an Active Cooling Method for High-power Three- Dimensional Integrated Circuit (3D-IC) Utilizing Multidimensional Configured Thermoelectric Modules PDF Online Free

Author : Huy Phan
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (743 download)

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Book Synopsis Development of an Experimental and Analytical Model of an Active Cooling Method for High-power Three- Dimensional Integrated Circuit (3D-IC) Utilizing Multidimensional Configured Thermoelectric Modules by : Huy Phan

Download or read book Development of an Experimental and Analytical Model of an Active Cooling Method for High-power Three- Dimensional Integrated Circuit (3D-IC) Utilizing Multidimensional Configured Thermoelectric Modules written by Huy Phan and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An increase in demand for more functionality and capacity of microelectronic components within the same logistic footprint drives the growth of three-dimensional integrated circuit (3D-IC) packaging technologies in recent years. However, the reduction in size and an increase in transistors density also intensify the heat flux of stacked-dice, which introduces many thermal challenges at both the package and cooling levels. Traditional passive cooling systems such as forced air convection cooling, phase change materials cooling and passive or active heat sinks will become inadequate to cool future processors and cannot accommodate the demand of future sub-ambient cooling of 3D-ICs. Within the past 10 years, major microprocessor manufactures have shifted their focuses toward higher bandwidth rather than frequency; however, the heat flux of current high-end CPU and GPU on the same die with parallel sequential computation is still in the order of 70 to 75 W/cm2 with local heat flux exceeding 1.5W/mm2 and growing. Today, stack-dice are used widely as low-powered memory applications because thermal management of such 3D architectures as high-powered processors inherits many thermal challenges and is very costly. Heat dissipation of 3D-IC is highly non-uniform and non-unidirectional due to many factors such as material properties, power architectures, power leakage, transistor packing density, and real estate available on the processor. Inadequate thermal management of these systems leads to reduction in reliability, performance and ultimately a system's catastrophic failure. In this study, an experimental, an analytical, and a thermal cycling of an active cooling method for three-dimensional integrated circuits utilizing a multidimensional configured thermoelectric cooler were investigated. In addition, an alternative method to analyze thermoelectric cooling system employing a Modified-Graphical-Method (MGM) to eliminate the need of using proprietary fabrication information was also studied.

Technology for Large Space Systems

Author :
Publisher :
ISBN 13 :
Total Pages : 684 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Technology for Large Space Systems by :

Download or read book Technology for Large Space Systems written by and published by . This book was released on 1989 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Data Center Cooling Augmentation Using Micro-encapsulated Phase Change Material

Author : Ruddhi Deshmukh
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (896 download)

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Book Synopsis Data Center Cooling Augmentation Using Micro-encapsulated Phase Change Material by : Ruddhi Deshmukh

Download or read book Data Center Cooling Augmentation Using Micro-encapsulated Phase Change Material written by Ruddhi Deshmukh and published by . This book was released on 2014 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ever increasing information technology heat load and data center cooling energy are the main reasons to investigate the performance of microencapsulated phase change slurry over other heat transfer fluids. In recent years, more effort is being made on the development of a new technique to use the phase change materials as pump-able heat transfer fluid and as heat storage system. Thermal Energy Storage (TES) using Phase Change Materials for data centers offers a very effective method of cutting electric power costs for owners and easing demand on the power grid. Thermal storage systems have been around for decades and include various components and methods to store and retrieve pre-cooled medium. PCM storage has been popular in large commercial applications located in regions with high peak (day time) utility energy costs and a much lower off-peak (night time) cost. Microencapsulated phase change slurry is dispersion where the phase change material, microencapsulated by a polymeric capsule, is dispersed in water. Compared to water, these new fluids have a higher heat capacity during phase change and a possible enhancement, as a result of this phase change, in the heat transfer phenomenon. The composition of phase change material used in slurry greatly affects its efficiency, If not selected properly it can cause serious damage, e.g. agglomeration and clogging of pipes. Current available systems use microencapsulated phase change slurry with heat exchangers. The objective of this project is to design and fabricate a shell- tube, phase change material (PCM) based heat exchanger, which can act as a thermal energy storage device, to increase the energy efficiency and hence can be incorporated in data center cooling.

Handbook of Research on Food Processing and Preservation Technologies

Author : Preeti Birwal
Publisher : CRC Press
ISBN 13 : 1000369625
Total Pages : 324 pages
Book Rating : 4.0/5 (3 download)

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Book Synopsis Handbook of Research on Food Processing and Preservation Technologies by : Preeti Birwal

Download or read book Handbook of Research on Food Processing and Preservation Technologies written by Preeti Birwal and published by CRC Press. This book was released on 2021-11-25 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this volume, several new food processing and preservation technologies have been investigated by researchers that have the potential to increase shelf life and preserve the quality of foods. This handbook introduces some emerging techniques in the food processing sector, focusing on nonthermal techniques such as high-pressure processing, ultrasonication of foods, microwave vacuum dehydration, thermoelectric refrigeration technology, advanced methods of encapsulation, ozonation, electrospinning, and mechanical expellers for dairy, food, and agricultural processing. These all have a wide range of application. The volume includes studies that show the successful application of these new technologies on a large number of juices, cheeses, yogurts, soups, egg whites and eggs, vegetable slices, purees, and milk, and the extraction, drying enhancement, and modification of enzymes are reported. This volume, part of the multi-volume Handbook of Research on Food Processing and Preservation Technologies will have tremendous application in different areas of the food industry, including food processing, preservation, safety, and quality evaluation. Other volumes of this handbook cover a wide of other emerging technologies. Handbook of Research on Food Processing and Preservation Technologies: Volume 2: Nonthermal Food Preservation and Novel Processing Strategies is an excellent reference resource for researchers, scientists, faculty and students, growers, traders, processors, industries, and others for looking for new nonthermal approaches for food processing and preservation.

Handbook of Research on Food Processing and Preservation Technologies

Author : Megh R. Goyal
Publisher : CRC Press
ISBN 13 : 1000405117
Total Pages : 1702 pages
Book Rating : 4.0/5 (4 download)

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Book Synopsis Handbook of Research on Food Processing and Preservation Technologies by : Megh R. Goyal

Download or read book Handbook of Research on Food Processing and Preservation Technologies written by Megh R. Goyal and published by CRC Press. This book was released on 2022-02-28 with total page 1702 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Research on Food Processing and Preservation Technologies is a 5-volume collection that highlights various design, development, and applications of novel and innovative strategies for food processing and preservation. Together, the 5 volumes will prove to be valuable resource for researchers, scientists, students, growers, traders, processors, and others in the food processing industry.

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 308 pages
Book Rating : 4.:/5 (3 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Space Station Systems

Author :
Publisher :
ISBN 13 :
Total Pages : 652 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Space Station Systems by :

Download or read book Space Station Systems written by and published by . This book was released on 1986 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Develop an Efficient Cooling System Using Phase Change Materials for Thermal Management of a Central Processing Unit(CPU)

Author : Salim AAL-Khlafin ($e author)
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (143 download)

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Book Synopsis Develop an Efficient Cooling System Using Phase Change Materials for Thermal Management of a Central Processing Unit(CPU) by : Salim AAL-Khlafin ($e author)

Download or read book Develop an Efficient Cooling System Using Phase Change Materials for Thermal Management of a Central Processing Unit(CPU) written by Salim AAL-Khlafin ($e author) and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

An Investigation Into Thermoelectric Coolers

Author : Eli David Franklin
Publisher :
ISBN 13 :
Total Pages : 45 pages
Book Rating : 4.:/5 (19 download)

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Book Synopsis An Investigation Into Thermoelectric Coolers by : Eli David Franklin

Download or read book An Investigation Into Thermoelectric Coolers written by Eli David Franklin and published by . This book was released on 2018 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thermoelectric cooler (TEC) is a type of cooler that uses the electricity between the junction of two materials to cause a temperature drop. These coolers operate using the Peltier effect. Effectively, a TEC uses electrical energy to pump heat from one area to another. An understanding of the science of how TECs operate as well as their design will be investigated and finally, a unique design for a TEC with a high efficiency is presented. Current TECs do not operate at high efficiency and cannot generate as much cooling as desired. This report creates a design of a high efficiency cooler that operates at a high coefficient of performance. The design will also include phase change material that will differentiate it from its competition and allow for superior cooling and efficiency. The design will also feature vacuum-sealed chambers that will provide very good insulation and allow for optimal cooling for long periods. This report presents a thermal model of a TEC that will investigate the different thermal systems acting on the cooler and provide a better understanding of the cooler at equilibrium once it reaches its coolest position. A unique heat sink is designed to optimally dissipate the heat that is removed by the TECs. The model can also examine the variables that affect the thermal system that are controllable in the design of the cooler. Given the new design, the cooler in this report was able to cool up 14 cans of soda from 25°C to 12°C in approximately 86 minutes given a constant 12 V power supply. The theoretical analysis concludes that this design is sufficient at creating a cooler with a high efficiency that can cool to the desired low temperature.

Applications of Solar Energy

Author : Himanshu Tyagi
Publisher : Springer
ISBN 13 : 981107206X
Total Pages : 369 pages
Book Rating : 4.8/5 (11 download)

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Book Synopsis Applications of Solar Energy by : Himanshu Tyagi

Download or read book Applications of Solar Energy written by Himanshu Tyagi and published by Springer. This book was released on 2017-11-29 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on solar-energy-based renewable energy systems and discusses the generation of electric power using solar photovoltaics, as well as some new techniques, such as solar towers, for both residential and commercial needs. Such systems have played an important role in the move towards low-emission and sustainable energy sources. The book covers a variety of applications, such as solar water heaters, solar air heaters, solar drying, nanoparticle-based direct absorption solar systems, solar volumetric receivers, solar-based cooling systems, solar-based food processing and cooking, efficient buildings using solar energy, and energy storage for solar thermal systems. Given its breadth of coverage, the book offers a valuable resource for researchers, students, and professionals alike.

Development of a Design Tool for PCM Based Free Comfort Cooling System in Office Buildings in South Africa

Author : Tichaona Kumirai
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Development of a Design Tool for PCM Based Free Comfort Cooling System in Office Buildings in South Africa by : Tichaona Kumirai

Download or read book Development of a Design Tool for PCM Based Free Comfort Cooling System in Office Buildings in South Africa written by Tichaona Kumirai and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Space cooling energy demand is projected to increase due to climate changes. For example, the South African climate change model projected warming to reach around 3 to 4AÌ2℗ʻC along the coast, and 6 to 7AÌ2℗ʻC in the interior. Such temperature increases will significantly increase the energy demand by building cooling applications. Thus, there is an urgent need to improve the energy efficiency in buildings and to reduce the peak cooling loads. Various studies for building free cooling using phase change materials have shown to reduce or avoid the need for mechanical space cooling. Very few of these studies covered Southern African climatic conditions and no research was found reporting a comparison of free cooling thermal performance of different PCM types for an individual climate scenario. The purpose of this study was to experimentally evaluate and compare the cooling performance of three PCM materials in plate-air heat exchanger modules subjected to Southern African climatic conditions and to use the data to deduce empirical correlations that can be used by thermal designers to determine the number of modules required to maintain an objective cooling load within the range of operating conditions. In this experimental investigation the cooling (discharging) performance of plate encapsulated Phase Change Materials (PCMs) for passive cooling applications were evaluated as measured by its average effectiveness, cooling power, energy absorption and phase transformation duration. A test facility that mimics a PCM-air heat exchanger module installed in a ventilation duct was used to consider the impact of varying air flow rate and inlet air temperature. PCM plate encapsulations with a thickness of 10 mm orientated vertically and spaced at a pitch of 15 mm were investigated. The thermal storage characteristics of three commercial PCMs were considered. Two paraffin type PCMs with melting temperature ranges of 25 AÌ2℗ʻC to 28 AÌ2℗ʻC and 22 AÌ2℗ʻC to 26 AÌ2℗ʻC and one type salt hydrate with a phase change temperature range 24 AÌ2℗ʻC to 25 AÌ2℗ʻC were used in air flows ranging in temperature from 30 AÌ2℗ʻC to 35 AÌ2℗ʻC and duct air velocities ranging from 0.4 m/s to 0.9 m/s. The results indicated that average effectiveness of the PCM modules decreased with increasing convective air mass flow rate. Increasing air mass flow rate (at constant inlet air temperature) or increasing the inlet air temperature (at constant air mass flow rate) increased the average cooling power. The phase transformation durations of the PCMs decreased as both the air flow rate and inlet air temperature increased. The salt hydrate (SP24E) module had the highest energy absorption capacity for all experimental conditions. The rate of energy absorption increased with inlet air temperature. From a design standpoint the desirable thermal performance of PCM is to have a high instantaneous heat absorption capacity and also extended over a longer period. Paraffinic PCMs met the first condition of high instantaneous heat absorption but did not meet the second condition of extended heat absorption duration. SP24E met the condition for extended heat absorption duration but had a lower instantaneous heat absorption capacity than the paraffin. Empirically-based correlations for determining the number of modules to maintain an objective cooling load were developed using a multiple regression analysis technique. From this, air conditioning system designers can determine the number of modules (installed in parallel) required to maintain an objective cooling load within the range of operating conditions tested.

Application of Phase Change Material in Sustainable Cooling of Data Centers

Author : Nikhil Dhiman
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (859 download)

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Book Synopsis Application of Phase Change Material in Sustainable Cooling of Data Centers by : Nikhil Dhiman

Download or read book Application of Phase Change Material in Sustainable Cooling of Data Centers written by Nikhil Dhiman and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The ever increasing information technology heat load and data center cooling energy are the main reasons to investigate the performance of microencapsulated phase change slurry over other heat transfer fluids. In recent years, more effort is being made on the development of a new technique to use the phase change materials as pump-able heat transfer fluid and as heat storage system. Microencapsulated phase change slurry is dispersion where the phase change material, microencapsulated by a polymeric capsule, is dispersed in water. Compared to water, these new fluids have a higher heat capacity during phase change and a possible enhancement, as a result of this phase change, in the heat transfer phenomenon. The composition of phase change material used in slurry greatly affects its efficiency, If not selected properly it can cause serious damage, e.g. agglomeration and clogging of pipes. Current available systems use microencapsulated phase change slurry with heat exchangers. The main objective of this work is to develop standalone pump-able microencapsulated phase change slurry that is able to withstand shear stresses of the pump and other course surfaces of pipe and pipe joints. In this study, experiments were performed, to determine performance of microencapsulated phase change slurry over conventional heat transfer fluids. After certain pumping cycles, scanning electron microscopy has been done to analyze the conditions of shell material of polymeric capsule. Also, testing has been done to predict durability and life cycle of microencapsulated phase change slurry.

ERDA Energy Research Abstracts

Author : United States. Energy Research and Development Administration
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration

Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Cooling Of Microelectronic And Nanoelectronic Equipment: Advances And Emerging Research

Author : Madhusudan Iyengar
Publisher : World Scientific
ISBN 13 : 9814579807
Total Pages : 471 pages
Book Rating : 4.8/5 (145 download)

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Book Synopsis Cooling Of Microelectronic And Nanoelectronic Equipment: Advances And Emerging Research by : Madhusudan Iyengar

Download or read book Cooling Of Microelectronic And Nanoelectronic Equipment: Advances And Emerging Research written by Madhusudan Iyengar and published by World Scientific. This book was released on 2014-08-25 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: To celebrate Professor Avi Bar-Cohen's 65th birthday, this unique volume is a collection of recent advances and emerging research from various luminaries and experts in the field. Cutting-edge technologies and research related to thermal management and thermal packaging of micro- and nanoelectronics are covered, including enhanced heat transfer, heat sinks, liquid cooling, phase change materials, synthetic jets, computational heat transfer, electronics reliability, 3D packaging, thermoelectrics, data centers, and solid state lighting.This book can be used by researchers and practitioners of thermal engineering to gain insight into next generation thermal packaging solutions. It is an excellent reference text for graduate-level courses in heat transfer and electronics packaging.

Advanced Thermoelectric Materials for Energy Harvesting Applications

Author : Saim Memon
Publisher : BoD – Books on Demand
ISBN 13 : 1789845289
Total Pages : 142 pages
Book Rating : 4.7/5 (898 download)

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Book Synopsis Advanced Thermoelectric Materials for Energy Harvesting Applications by : Saim Memon

Download or read book Advanced Thermoelectric Materials for Energy Harvesting Applications written by Saim Memon and published by BoD – Books on Demand. This book was released on 2019-10-30 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Thermoelectric Materials for Energy Harvesting Applications is a research-intensive textbook covering the fundamentals of thermoelectricity and the process of converting heat energy into electrical energy. It covers the design, implementation, and performance of existing and advanced thermoelectric materials. Chapters examine such topics as organic/inorganic thermoelectric materials, performance and behaviors of thermoelectric devices, and energy harvesting applications of thermoelectric devices.