Index Catalog // ScholarsArchive@OSU

Experimental investigation of natural convection from an array of uniformly heated horizontal cylinders to mercury

Creator:: Wang, Deing
Abstract:: An experimental investigation was conducted to better understand the heat transfer process with natural convection from an array of uniformly heated horizontal cylinders to mercury. Five assembly geometries were studied, these being the single horizontal cylinder, two cylinders with spacing ratios S/D = 2,3 and 4, (S represents the center-to-center...
Resource Type:: Dissertation
Full Text:: coefficient of thermal expansion 1/T Gravitational acceleration g L/t2 Temperature difference AT T Heat

Finite element simulation of heat transfer in Pacific whiting surimi paste during ohmic and conventional heating

Creator:: AbuDagga, Yaser
Abstract:: The viability of using ohmic "resistance" heating as a process alternative to inactivating the heat-stable softening enzyme in Pacific whiting surimi was investigated. A fast heating rate through the enzyme-active temperature range would reduce the damage to the gelling network in surimi-based products. Simulating the ohmic heating process in surimi...
Resource Type:: Masters Thesis
Full Text:: Heatin Abstract approved: Dr. Edward Kolbe Abstract approved: Dr. Gordon Reistad The viability of

Modelling and flow measurement of shallow geothermal systems with downhole heat exchangers

Creator:: Miles, Charles Ray
Abstract:: The low temperature geothermal deposits in the Klamath Falls area are commonly used for heating buildings. The system often used to accomplish this consists of a heat exchanger that extends the full length of the casing within the well. This casing has slots cut in it to allow geothermal water...
Resource Type:: Masters Thesis
Full Text:: annulus g - acceleration due to gravity HRij heat flux path ij L length of well between perforations

Geothermal well downhole heat exchanger design analysis

Creator:: Kreitlow, David Brian
Abstract:: The low temperature geothermal resource at Klamath Falls, Oregon is widely used for heating buildings. A common technique for using this resource consists of a heat exchanger down in the well inside a casing which extends the full length of the well. Slots are cut in the casing to allow...
Resource Type:: Masters Thesis
Full Text:: outer annulus g - acceleration due to gravity HR ij heat flux to path ij k thermal conductivity L

Thermal energy recovery from large transformers

Creator:: Yao, Barry
Abstract:: This thesis is concerned with designing and simulating waste energy retrieval systems from large transformers to provide heating and cooling of a control house. The transformer selected is Transformer Bank One at the Ross Substation in the BPA system. The unit is an ASEA 250 MVA transformer with forced oil,...
Resource Type:: Masters Thesis
Full Text:: L Collector loss coefficient U t Top loss coefficient of collector W oC E. g E. p Cr

Thermodynamic analysis of geothermal energy systems with forced recovery from aquifers

Creator:: Lee, Se Kyoun
Abstract:: A thermodynamic analysis of forced geoheat recovery from aquifers has been accomplished. The system investigated consists of a single recharging-discharging well pair, in a horizontally extensive aquifer, with either power generation or space heating as surface applications. The space heating systems investigated are (i)direct heating, (ii)heat pumps and (iii)a combination...
Resource Type:: Dissertation
Full Text:: GEOTHERMAL ENERGY SYSTEMS WITH FORCED RECOVERY FROM AQUIFERS Abstract approved: Redacted for Privacy Gordon

Computer simulation and evaluation of solar cooling systems with hot and cold storage options

Creator:: Krishna, Sudhir S.
Abstract:: In this thesis, computer simulation and evaluation of solar cooling systems are presented. The simulations were conducted using the TRNSYS program, developed at the University of Wisconsin. The TRNSYS program was modified by the addition of new models for the solar collector with high fluid thermal capacity, the absorption cooler,...
Resource Type:: Masters Thesis
Full Text:: : Redacted for Privacy Dr. Gordon M. Reistad In this thesis, computer simulation and evaluation of solar

Simulaton of a solar heating and cooling system with experimental evaluation

Creator:: Layton, William Clifford
Abstract:: This thesis is concerned with simulating two forms of energy retrieval. Standard computer programs are routinely used to simulate such energy systems. However, the accuracy of these simulations is not well documented. The main objective of the work presented here is to evaluate the validity of this type of simulation...
Resource Type:: Masters Thesis
Full Text:: Cooling System with Experimental Evaluation Abstract approved: Redacted for privacy Dr. Gordon M

Use of the exergy concept for design improvement of heat exchangers and heat exchanger networks

Creator:: Ranasinghe, Jatila
Abstract:: The second law of thermodynamics, through the exergy concept, allows us to quantify and rationally cost the consumption of exergy (irreversibility) used to drive the heat exchange process and the effluent losses of exergy in a heat exchanger For systems with a network of heat exchangers, the exergy concept recognizes...
Resource Type:: Dissertation
Full Text:: Abstract approved: Prof. Gordon M. Reistad The second law of thermodynamics, through the exergy concept

Analysis and simulation of dual-source heat pumps with three-fluid evaporators

Creator:: Lee, Jai-hyo
Abstract:: When the ambient temperature drops, air-source heat pumps deliver less heating per unit of power input and usually cannot provide for the heating load. Therefore, dual-source heat pumps can offer an attractive alternative. In the context of this work, a dual-source heat pump operates as an air-source unit under normal...
Resource Type:: Dissertation
Full Text:: gravity g Gas or vapor H Water i Inlet i Inside L Liquid R Refrigerant satc Saturation temperature

Experimental evaluation and numerical modeling of a water source heat pump evaporator

Creator:: Means, Paul Morency
Abstract:: Water source heat pumps are increasingly being used for residential and commercial space heating. Typically, these heat pumps are capable of both heating and cooling, and historically the design emphasis has been on improving the units' cooling performance. Recently, there has been more interest in improving the heating performance, however,...
Resource Type:: Masters Thesis
Full Text:: Numerical Modeling of a Water Source Heat Pump Evaporator. Redacted for Privacy Abstract approved: Gordon

Analysis of ceramic heat exchangers for use in a combined-cycle, wood-fired power plant

Creator:: Ranasinghe, Jatila
Abstract:: This report presents the analysis of ceramic heat exchangers for use in a combined-cycle, wood-fired power plant. The combined-cycle system investigated is characterized by having a wood-fueled combustor, an indirect-fired gas turbine, and a Rankine steam cycle. The direct use of low-grade fuels, such as wood, in present gas turbines...
Resource Type:: Masters Thesis
Full Text:: Gordon M. Reistad This report presents the analysis of ceramic heat exchangers for use in a combined

Analysis of a wood-fueled trimburner system for use in a combined-cycle, wood-fired power plant

Creator:: Stephenson, Jerry D.
Abstract:: This report investigates the use of wood to fuel a trimburner incorporated in a combined-cycle, biomass-fired power plant. The term "trimburner" applies to a ductburner which is designed to boost the temperature of the air stream entering the gas turbine. The work presented here is part of a larger biomass...
Resource Type:: Masters Thesis
Full Text:: Privacy Abstract approved: Gordon M. Reistad This report investigates the use of wood to fuel a

Analysis of heat pump and steam bleed-off systems linked with thermal-electric power plants to supply low-grade heating and cooling

Creator:: Ileri, Arif
Abstract:: This thesis analyzes two systems that can meet low-grade heating and/or cooling demands by operating in conjunction with thermal-electric power plants. At the application site, one of the systems, HPS, has water-to-air heat pumps that are connected to the supply and return lines of a plant-to-user loop. During heating, the...
Resource Type:: Dissertation
Full Text:: : Redacted for Privacy Dr. Gordon M. Reistad This thesis analyzes two systems that can meet low-grade

Computer simulation of a combined-cycle biomass-fueled power plant

Creator:: Fox, Stephen John
Abstract:: This thesis presents thermodynamic evaluations of various biomass-fueled combined-cycle power plants using a computer model developed for simulating such plants. The combined-cycle systems Investigated are characterized by having a wood-fueled combustor, an indirect-fired gas turbine, and a steam cycle. This work was part of a larger biomass energy project at...
Resource Type:: Masters Thesis
Full Text:: -Fueled Power Plant Abstract approved: Redacted for Privacy Gordon M. Reistad This thesis presents

Flow measurement and characterization in shallow geothermal systems used for downhole heat exchanger applications

Creator:: Churchill, David J.
Abstract:: This thesis reports on an investigation of flow patterns in shallow geothermal wells in Klamath Falls, Oregon, Although wells have been extensively used in the area, the exact nature of the flows in the wells has not been characterized. Flow characterization is a principal object of this study. Horizontal crossflows...
Resource Type:: Masters Thesis
Full Text:: APPLICATIONS Abstract approved: Redacted for privacy Gordon M. Reistad This thesis reports on an

Evaluation of thermal energy storage requirements for a geothermal based district heating system

Creator:: Lawrence, Thomas M.
Abstract:: The thermal energy storage requirements for a district heating system utilizing geothermal energy is evaluated with respect to the system design heating load and local climatic conditions. The local climate pattern is represented by a series of events which characterize the nature and sequence of the cold spells that can...
Resource Type:: Masters Thesis
Full Text:: use of a storage tank. 23 Solar 4NH3(g) Heat to Heat Tank 1 Load or Tank 2 Atmosphere

Analysis of energy conversion systems, including material and global warming aspects

Creator:: Zhang, Mingyuan
Abstract:: With the rapid increase of the world energy demand and consumption, the method and techniques to analyze, improve and optimize energy conversion systems have to deal not only with direct fuel exergy (energy) consumption, but also with other resources, which have associated exergy consumptions, and with environmental impacts, such as...
Resource Type:: Dissertation
Full Text:: Material and Global Warming Aspects. Abstract approved: Gordon M. Reistad With the rapid

Evaporator analysis for application to water-source and ice-maker heat pumps

Creator:: Aceves, Salvador M.
Abstract:: Water-source and ice-maker heat pumps share many characteristics. However, each presents different technical difficulties that have prevented them from being used more widely. In a water-source heat pump a very important consideration is to reduce water consumption, while in an ice-maker heat pump a major concern is to reduce the...
Resource Type:: Dissertation
Full Text:: : Gordon M. Reistad Water-source and ice-maker heat pumps share many characteristics. However, each

Analysis of heat pump coupled aquifer seasonal thermal energy storage systems

Creator:: McMahon, William R.
Resource Type:: Masters Thesis
Full Text:: AQUIFER SEASONAL THERMAL ENERGY STORAGE SYSTEMS Abstract Approved: Redacted for Privacy Gordon M

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