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 230 for “"heating and cooling"”.
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Heat transfer in heating and cooling of viscous liquids
A review of previous literature pertaining to the heating and cooling of viscous liquids and to the heat transfer of viscous liquids flowing in pipes was made. It was found that there was a marked lack of information on this subject. A double-pipe heat exchanger was constructed from standard iron …
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Dynamic thermal response of buildings resulting from heating and cooling interruptions
Transient modelling of heat fluxes and temperatures in structures was conducted to examine the effect of various characteristics on the temperature response during unusual operating and extreme weather conditions. The analytical model was validated using published experimental data and numerical …
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Achieving high efficiency thermoelectric heating and cooling with metal foam heat exchangers
… 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 examination of compact heat exchanger (HX) design. …
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Heat transfer and friction for heating and cooling of fluids in pipes
Thesis: Sc. D., Massachusetts Institute of Technology, Department of Chemical Engineering, 1930
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Environmental Performance Evaluation of Heating and Cooling Between Sustainable and Conventional Office Building
… environmental performance effectiveness of heating and cooling systems between ‘sustainable’ and conventional office buildings. The key research question that this study tried to answear is, ‘To what extent do sustainable office buildings remain sustainable in the long run?’ On this basis, …
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Generative Urbanism toward Thermal Synergy: Sustainable urban design for district heating and cooling
… observation of the space conditioning mechanism and the nature of thermal energy may produce systematic improvement in energy efficiency while maintaining the comfort level. Specifically, the synergy between heating and cooling needs in the urban environment provides the chance to circulate heat …
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Computational Approaches to Improving Room Heating and Cooling for Energy Efficiency in Buildings
… costs in buildings, it is important to understand the dynamics of controlled heating, cooling, and air circulation of an individual room, the "One-Room Model Problem." By understanding how one most efficiently regulates a room's climate, one can use this knowledge to help develop overall …
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Investigation of the heat transfer enhancement effects of nanofluids in process heating and cooling
… faces a dual challenge; the need for more energy and less carbon emission. Out of the 50 billion tonnes of greenhouse gases emitted each year, 24.2 % comes from energy use in industries such as processing and manufacturing that require constant heating and cooling. Heat transfer improvements in …
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Investigation of Concrete Wall Systems for Reducing Heating and Cooling Requirements in Single Family Residences
… over the unpredictability of the energy supply and the pollution associated with its consumption, new methods are constantly being developed to improve the energy efficiency of homes. A variety of concrete wall systems including Multi-functional Precast Panel (MPP) systems and Insulating …
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Thermal models of buildings : determination of temperatures, heating and cooling loads : theories, models and computer programs
The need to estimate indoor temperatures, heating or cooling load and energy requirements for buildings arises in many stages of a buildings life cycle, e.g. at the early layout stage, during the design of a building and for energy retrofitting planning. Other purposes are to meat the authorities …
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Development and Demonstration of Surrogate Models to Predict Energy-Related Building Features from Heating and Cooling Load Signature
This thesis introduces an innovative, efficient, and cost-effective approach for screening office buildings to identify the buildings with the most retrofit potential. Traditional auditing methodologies, including advanced inverse-based methods, often face constraints in terms of engineering cost, …
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Incorporation of energy performance data in the design process : heating and cooling load estimation and analysis in a computerized space allocation procedure
Thesis. 1977. M.Arch.--Massachusetts Institute of Technology. Dept. of Architecture.
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A persuasive GPS-controlled thermostat system
… saving. We identify an opportunity to save on heating and cooling using a system we propose for just-in-time heating and cooling based on travel distance computation from GPS-enabled mobile phones. Analyzing GPS travel data from eight participants (8-12 weeks each) and heating and cooling …
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Long-term ground response For borehole heat exchangers in clay
… of ground source heat pumps to transfer heat to and from the ground via borehole heat exchangers is among the most energy efficient techniques for space heating and cooling. Designs for seasonal heat exchange systems are becoming increasingly popular in urban environments to reduce energy costs …
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Latent and sensible heat storage in concrete blocks
… this achievement. Concrete blocks (both regular and autoclaved), the widely used construction material, were selected as ideal candidate for the experimental evaluation. Followed by previous laboratory work, both Butyl Stearate (BS) and Paraffin (PAR) were selected as PCM due to the fact that …
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Modeling and control of a hot micro-embossing machine
As the market for polymer micro- and nano-devices expands there is an ever-present need for a manufacturing standard to mass produce these parts. A number of techniques for fabricating these devices are soft lithography, micro-injection molding, and micro-embossing. Micro-embossing shows great …
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Expert Control Strategies for Solar Cooling systems
Between 1990 and 2009, household final energy consumption in EU-27 increased by 8%, caused by rising standards of living, an increase in comfort levels and broader ownership of domestic appliances. In 2009, the total electrical consumption due to residential sector amounted at 36%. Space heating …
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Process-based cost modeling of tool-steels parts by transient liquid-phase infiltration of powder-metal preforms
… powder scrap rates, 15 % for the Pressing-TLI and 80% for the 3DP-TLI. The high scrap rate value of the 3DP process originates from the fact that powder is sieved before printing, eliminating the coarse and very fine particles. A possible option to decrease this value is to recycle or sell the …
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