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 23 for “"heat pump system"”.
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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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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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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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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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Development of a hybrid solar photovoltaic and heat pump system for domestic heating and electricity generation
… investigates a hybrid photovoltaic thermal heat pump system that uses an indirect expansion method. It combines multiple solar photovoltaic thermal panels that convert solar energy to heat and electricity with a water-to-water heat pump. This allows for the generation of heat and electricity …
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Design, Testing And Controls For Air Source Heat Pump System In Cold Climates Using Natural & Conventional Refrigerants
<p>Fossil-fuel based heating systems used in the residential buildings in northeastern U.S region are not only inefficient but also largely responsible for the greenhouse gas emissions in U.S. Electrification of the buildings has been proved to be the most efficient way to reduce the greenhouse gas …
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ENERGETIC STUDY OF A SOLAR ASSISTED GROUND SOURCE HEAT PUMP SYSTEM FOR DOMESTIC HEATING WITH PARAMETRIC ANALYSES VIA SIMULATION
In this thesis, a solar assisted ground source heat pump system is energetically evaluated for the UK Midlands climate conditions. The conducted research is supported by an experiment made by De Montfort University. This consisted of seven photovoltaic-thermal collectors and a novel very shallow …
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Energy Performance and Economic Evaluations of the Geothermal Heat Pump System used in the KnowledgeWorks I and II Buildings, Blacksburg, Virginia
Heating, Ventilating and Air Conditioning Systems (HVAC) are not only one of the most energy consuming components in buildings but also contribute to green house gas emissions. As a result often environmental design strategies are focused on the performance of these systems. New HVAC technologies …
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The architectural impact of using ground-source heat pumps in commercial buildings in Las Vegas
… and long term performance of ground-coupled heat pump systems over a fixed period of time. The results are applied to a commercial office building in order to assess the net impact of combining various energy efficiency strategies. The conclusion of the comprehensive study is that energy …
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Experimental study of reversible AC/HP system for electric vehicles
Conventional passenger cars use waste heat from internal combustion engine for cabin heating. While for electric vehicles (EV), the energy conversion efficiency is much higher, so that there isn't much waste heat available for cabin heating. A general way to provide heat for EV is to use a positive …
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Achieving high efficiency thermoelectric heating and cooling with metal foam heat exchangers
… examines the development of a high efficiency heat pump system using thermoelectric (TE) and reticulated metal foam (RMF) technologies to power a vehicle`s battery thermal management system. The focus is split into two areas: first a review of TE’s sourcing or removing heat, second an …
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Improving cold climate performance of heat pumps using market-available systems
Air source heat pumps are an excellent electric alternative to fossil fuel based heating systems for reducing residential greenhouse gas (GHG) emissions, but common mild climate systems suffer significant performance losses at the low outdoor temperatures experienced in cold climates. Improved heat …
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Secondary loop reversible AC/HP system for electric vehicles
… results of a secondary loop air conditioning-heat pump system compared to a baseline direct system. The secondary loop system has a refrigerant circuit operating between two 50/50 water glycol loops, and uses the identical compressor and accumulator as the baseline DX system. For most …
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A novel heat pump cycle to enable the flexible storage and deployment of harvested waste heat in cold climates
… and electrical energy in residential HVAC systems. New regulations and an increase in renewable energy participation in our power systems will increasingly incentivize fully electric solutions, flexible loads and load reductions for consumers. A novel heat pump concept is proposed that …
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Investigation of three integrated energy systems with desalination, heat storage, thermochemical cycles and heat upgrade
… energy-based multigeneration integrated systems with molten salt heat storage and desalination options where copper-chlorine (Cu-Cl) and magnesium-chlorine (Mg-Cl) thermochemical water-splitting cycles for hydrogen production are used. System 1 integrates the wind, solar and geothermal …
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Evaluation of the design, construction and operation of a gas fuelled, engine driven heat pump, and its possible role in a UK market
… and evaluation of a gas fuelled, engine driven heat pump and its possible role in a future U. K. market. In 1977 a joint venture was embarked upon by the Open University Energy Research Group, Lucas Aerospace and Milton Keynes Development Corporation to design, manufacture and install a gas …
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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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TRANSIENT MODELING OF TWO-STAGE AND VARIABLE REFRIGERANT FLOW VAPOR COMPRESSION SYSTEMS WITH FROSTING AND DEFROSTING
… the transient simulation of vapor compression systems. This framework contains a wide range of components and its modular nature enables an arbitrary cycle configuration to be analyzed. One of the highlights of this framework is the first-principles heat exchanger models with many salient …
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Analysis of Thermal Energy Collection from Precast Concrete Roof Assemblies
The development of precast concrete housing systems provides an opportunity to easily and inexpensively incorporate solar energy collection by casting collector tubes into the roof structure. A design is presented for a precast solar water heating system used to aid in meeting the space and …
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Numerical analysis of the thermal performance of vapour compression heat pump heat exchanger using Python and computational fluids dynamics (CFD)
Numerical analysis on fin and tube heat exchangers contributes towards the implementation of energy-efficient technologies in the industrial and building sectors. Fin and tube heat exchangers are found in various mechanical applications including heating, ventilation, and air conditioning (HVAC) …
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