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in publisher: "Drexel Univ., Philadelphia, PA United States. Dept. of Mechanical Engineering"  
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Fuel property effects on engine combustion processes. Final report

Description: A major obstacle to improving spark ignition engine efficiency is the limitations on compression ratio imposed by tendency of hydrocarbon fuels to knock (autoignite). A research program investigated the knock problem in spark ignition engines. Objective was to understand low and intermediate temperature chemistry of combustion processes relevant to autoignition and knock and to determine fuel property effects. Experiments were conducted in an optically and physically accessible research engine,… more
Date: April 27, 1995
Creator: Cernansky, N.P. & Miller, D.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of emulsifier on particle size of a phase change material in a mixture with water. Progress report, March 31, 1991--June 30, 1991

Description: The use of a phase-change material (PCM) in a district cooling system was studied in order to increase the heat transfer performance of the system. One of the major technical obstacles to its use is the clogging of the piping system. The present study attempts to minimize the clogging problem by using an emulsifier. Effects of the emulsifier on the mixture of water and hexadecane (a PCM) were studied. A small amount (60 to 2775 ppm) of emulsifier caused remarkable effects resulting in the produ… more
Date: June 30, 1991
Creator: Choi, E.; Cho, Y. I. & Lorsch, H. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A novel concept for heat transfer fluids used in district cooling systems. Progress report, September 25, 1990--December 31, 1990

Description: Low-temperature phase-change materials (PCMS) were mixed with water to enhance the performance of heat transfer fluid. Several PCMs were tested in a laboratory-scale test loop to check their suitability to district cooling applications. The phase-change temperatures and latent heats of fusion of tetradecane, pentadecane, and hexadecane paraffin waxes were measured using a differential scanning calorimeter. The heat of fusion of these materials is approximately 60% of that of ice. They exhibit n… more
Date: January 4, 1991
Creator: Cho, Y. I.; Choi, E. & Lorsch, H. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fuel property effects on engine combustion processes. Annual report, January 1, 1993--December 31, 1993

Description: Our engine studies have concentrated on 2 areas of interest to autoignition and emissions from engines. In the first, we investigated the effect of nitric oxide (NO) on the reactivity and autoignition behavior of 87 PRF. In the second study, we continued work on the effects of blending ethers on the reactivity and autoignition of a primary reference fuel blend, 87 PRF, with emphasis placed on the chemical interactions between ethers and the baseline fuel. The effects of nitric oxide (NO) on the… more
Date: January 10, 1994
Creator: Cernansky, N. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of emulsifier on particle size of a phase change material in a mixture with water

Description: The use of a phase-change material (PCM) in a district cooling system was studied in order to increase the heat transfer performance of the system. One of the major technical obstacles to its use is the clogging of the piping system. The present study attempts to minimize the clogging problem by using an emulsifier. Effects of the emulsifier on the mixture of water and hexadecane (a PCM) were studied. A small amount (60 to 2775 ppm) of emulsifier caused remarkable effects resulting in the produ… more
Date: June 30, 1991
Creator: Choi, E.; Cho, Y. I. & Lorsch, H. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A novel concept for heat transfer fluids used in district cooling systems

Description: Low-temperature phase-change materials (PCMS) were mixed with water to enhance the performance of heat transfer fluid. Several PCMs were tested in a laboratory-scale test loop to check their suitability to district cooling applications. The phase-change temperatures and latent heats of fusion of tetradecane, pentadecane, and hexadecane paraffin waxes were measured using a differential scanning calorimeter. The heat of fusion of these materials is approximately 60% of that of ice. They exhibit n… more
Date: January 4, 1991
Creator: Cho, Y. I.; Choi, E. & Lorsch, H. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermal analysis of n-alkane phase change material mixtures

Description: Tests were performed to characterize the thermal behavior of it number of n-alkanes to be used as phase change materials (PCMs) in district cooling applications. Hexadecane and tetradecane were mixed in different fractions, and their thermal behavior was experimentally evaluated. Test results for melting temperature and fusion energy for laboratory grade hexadecane and tetradecane showed good agreement with datain the literature. However, values for commercial grade hexadecane were found to be … more
Date: March 31, 1991
Creator: Chio, Young I.; Choi, Eunsoo & Lorsch, Harold G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermal analysis of n-alkane phase change material mixtures. Progress report, January 1, 1991--March 31, 1991

Description: Tests were performed to characterize the thermal behavior of it number of n-alkanes to be used as phase change materials (PCMs) in district cooling applications. Hexadecane and tetradecane were mixed in different fractions, and their thermal behavior was experimentally evaluated. Test results for melting temperature and fusion energy for laboratory grade hexadecane and tetradecane showed good agreement with datain the literature. However, values for commercial grade hexadecane were found to be … more
Date: March 31, 1991
Creator: Chio, Young I.; Choi, Eunsoo & Lorsch, Harold G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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