# Mechanical Engineering Commons™

Articles 271 - 277 of 277

## Full-Text Articles in Mechanical Engineering

Energy And Cost Analysis Of Commercial Hvac Equipment: Offices And Hospitals, Robert E. Lyman Jr. Mar 1979

#### Energy And Cost Analysis Of Commercial Hvac Equipment: Offices And Hospitals, Robert E. Lyman Jr.

##### Masters Theses

A study was made to determine annual energy use in several typical heating, ventilating, and air conditioning (HVAC) systems for two commercial building types: offices and hospitals. The study was part of a program at Oak Ridge National Laboratory to develop a model to predict energy use in the commercial sector of the United States. This study's objective is to define relationships between energy use and capital cost for commercial HVAC systems.

The NECAP computer program was used to analyze the HVAC systems' energy use. Both pre-embargo and current energy efficient HVAC system designs were modeled with several energy ...

Energy Conservation And Economic Analysis Of Residential Refrigerators, Robert A. Hoskins Jun 1977

#### Energy Conservation And Economic Analysis Of Residential Refrigerators, Robert A. Hoskins

##### Masters Theses

A detailed computer model is developed to calculate energy flows and electricity use for residential refrigerators. Model equations are derived from application of the first law of thermodynamics, analysis of manufacturers' literature, and related studies. The model is used to evaluate the energy (and associated initial cost) impacts of alternative designs to reduce refrigerator energy use.

Model results show that 56% of the total heat gain in a typical 0.45 m3 (16 ft3) top-freezer refrigerator is due to conduction through cabinet walls and doors. The remaining 44% is from door openings, heaters, fans, food, gasket area infiltration ...

Transient Response Of Linear Elastic Structures Determined By The Matrix Exponential Method, William Christopher Terrill Stoddart Dec 1970

#### Transient Response Of Linear Elastic Structures Determined By The Matrix Exponential Method, William Christopher Terrill Stoddart

##### Masters Theses

This investigation was undertaken to develop a numerical solution for the transient response of linear, elastic structures based on the matrix exponential solution for first order, linear, constant coefficient differential equations. The investigation was prompted by the need for an economical technique that can be used to analyze multidegree of freedom systems exemplified by piping and structural components associated with nuclear power plants.

A mathematical model characterizing the behavior of linear, elastic structures was developed by using state variables of displacement and velocity. The structure consists of beam elements of uniformly distributed mass, weightless springs, and rigid masses. The stiffness ...

An Experimental Study Of The Viscoseal Bearing, Chandrakant Khumaji Shah Feb 1969

#### An Experimental Study Of The Viscoseal Bearing, Chandrakant Khumaji Shah

##### Masters Theses

The experimental data obtained from two groove geometries of the viscoseal bearing were analyzed to study the bearing characteristics and the sealing performance. The experimental bearing characteristics were compared with the Dubois and Ocvirk Short-bearing Approximation. The sealing performance analysis of the bearing included (1) the determination of the sealing coefficient which was compared with the Stair and Hale method of theoretical prediction and (2) the effect of the bearing eccentricity ratio on the sealing coefficient, which was compared with the Vohr and Chow method of theoretical prediction.

The results of the study indicated that, at constant load and speed ...

Dec 1967

#### An Analytic Study Of Microlayer Evaporation And Related Bubble Growth Effects In Nucleate Boiling, Gerald Steven Dzakowic

##### Doctoral Dissertations

Introduction: Nucleate boiling heat transfer is of technical interest since it allows a high heat flux with only a relatively small temperature difference. The demand for a better understanding of the behavior of a liquid as it exceeds its saturation temperature and changes to vapor has been the result of design problems in liquid cooled rocket nozzles and nuclear reactor cores. Moreover, to improve the performance of these high heat flux systems an understanding and control of the phenomena of boiling must be achieved. This dissertation is an attempt to establish the criteria for the heat and mass transfer processes ...

The Design And Construction Of A Visco Seal Test Facility, Charles Franklin Bowman Jun 1966

#### The Design And Construction Of A Visco Seal Test Facility, Charles Franklin Bowman

##### Masters Theses

No abstract provided.

The Analysis Of Cantilever Plates With Concentrated Loads, Constant Roberts Marks Aug 1941

#### The Analysis Of Cantilever Plates With Concentrated Loads, Constant Roberts Marks

##### Masters Theses

(From the Introduction)

The problem of a cantilever plate or slab with variable, discontinuous, concentrated, or eccentric loading occurs frequently in engineering design. Examples are substructure walls, piers, projecting floor slabs, and gear teeth. The solution of most of these problems can be made to depend on the analysis of the plate in question loaded with one or more concentrated loads. Such analyses are available for only a few cases of loading, and no practical method is available to the designer for making any kind of a reasonably accurate stress analysis for many cases he may encounter.

In this paper ...