Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 150 for “"heat pump"”.
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An air-to-air heat pump
All available information on heat pumps was read and the articles pertaining directly to design, operation, and the overall performance of air-to-air heat pumps were included in the Review of Literature. The advantages and disadvantages of the basic types of systems and their heat sources were …
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Investigation of gas engine driven heat pump systems
Heat pumps are becoming increasingly popular, but poor electricity generating efficiency limits the potential energy savings of electrically powered units. Thus the work reported in this thesis concerns the development of a range of gas engine driven heat pumps for industrial and commercial heating …
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Model predictive control of a thermoelectric-based heat pump.
… for cooling and a separate electric element for heating which is energy expensive when the source of energy is electricity. The proposed solution is a thermoelectric heat pump for both heating and cooling. A model predictive controller (MPC) is designed, implemented and tested to optimize the …
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Mathematical modelling and optimisation of a water heat pump
… the present gap between currently realised heat pump performance and the theoretical limit. The single most important pre-requisite to this objective is the identification and quantitative assessment of the various non-idealities and degradative phenomena responsible for the present …
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Improvements on performance of a heat pump water heater system
Heat Pump Water Heater (HPWH) is classified as one renewable energy efficient technology, which could be explained by their environmentally friendly nature with low energy consumption. The Coefficient of Performance (COP) of the HPWH can be influenced by multiple factors: ambient temperature, …
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Contractor Learning and Home Energy Efficiency in Heat Pump Installations
The displacement of fossil-fuel based heating is essential for achieving decarbonization in the building sector, which represents about a third of national emissions in the United States. Electric heat pumps are the primary technology needed to do so, but widespread adoption is hindered by a …
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The design of a residential water-to-water heat pump
The residential heat pump is becoming more and more important as a means of heating and cooling homes. The American family is booming increasingly aware of year—round air conditioning in all its various aspects, not only for hosting and cooling the homo, but also for humidity control and air …
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Performance Analysis of a Large-Scale Ground Source Heat Pump System
… renewable energy sources by 2020. Ground Source Heat Pump (GSHP) systems can play a critical role in reaching these goals within the building sector. Achieving such benefits relies on proper design, integration, installation, commissioning, and operation of these systems. This work seeks to …
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Urban space heating with a heat pump-condenser temperature water system
Thesis: M.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1976
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Improving heat pump performance via compressor capacity control : analysis and test.
Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
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Development and modeling of a solar powered ground source heat pump system
… Most building energy consumption is for space heating, cooling and water heating in buildings. Enhancing building efficiency represents one of the easiest, most immediate and most cost-effective ways to reduce carbon emissions. One of energy efficient and environment friendly technologies with …
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Design of a residential air source heat pump for extremely cold climates
Air source heat pumps are energy efficient systems suitable for space heating applications, however, their performance drastically degrades in low ambient temperatures. An innovative design is proposed in this thesis that can switch operating modes to allow efficient heating operation in an ambient …
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Investigation of a novel solar photovoltaic/loop-heat-pipe heat pump system
… technologies by incorporating an innovative loop heat pipe (LHP) and a typical heat pump. In addition, a coated aluminium-alloy (Al-alloy) sheet replaces the conventional baseboard for the PV cells to improve heat exportation. As a result, this research has developed a novel solar PV/LHP heat pump …
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Design and Lab Implementation of an Air Source Transcritical CO2 Heat Pump
… laboratory-scale air-source transcritical CO2 heat pump (TCHP) was developed to evaluate the performance of low-global-warming-potential (GWP) refrigerants for cold climate applications. A custom climate chamber was also constructed to simulate winter weather conditions typical of the …
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Development of enhanced heat transfer components and heat pump systems for decarbonization
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01
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A domestic solar/heat pump heating system incorporating latent and stratified thermal storage.
Both solar and heat pump heating systems are innovative technologies for sustaining ecological heat generation. They are gaining more and more importance due to the accelerating pace of climate change and the rising cost of limited fossil resources. Against this background, a heating system …
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Enhancing heat pump efficiency using extremum seeking control: A MATLAB SimScape-based study
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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Dynamic Modeling and Model-Free Real-Time Optimization for Cold Climate Heat Pump Systems
Air source heat pump (ASHP) has been a well-received technology to provide space and/or water heating for building and industrial applications, while its efficiency and heating capacity can be severely limited when operated in cold climate. Various modifications have been proposed for cold-climate …
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Simulation of a vertical ground-coupled heat pump system with optimal ground loop design
… found in the earth's crust. Ground coupled heat pumps (GCHP) consist of a water-to-air or water-to-water heat pump, a circulator pump, a buried pipe grid and an interconnecting header. Heat is extracted from or rejected to the ground through this buried pipe grid that circulates a heat …
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