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On the reversed Brayton cycle with high speed machinery

Abstract

This work was carried out in the laboratory of Fluid Dynamics, at Lappeenranta University of Technology during the years 1991-1996. The research was a part of larger high speed technology development research. First, there was the idea of making high speed machinery applications with the Brayton cycle. There was a clear need to deepen the knowledge of the cycle itself and to make a new approach in the field of the research. Also, the removal of water from the humid air seemed very interesting. The goal of this work was to study methods of designing high speed machinery for the reversed Brayton cycle, from theoretical principles to practical applications. The reversed Brayton cycle can be employed as an air dryer, a heat pump or a refrigerating machine. In this research the use of humid air as a working fluid has an environmental advantage, as well. A new calculation method for the Brayton cycle is developed. In this method especially the expansion process in the turbine is important because of the condensation of the water vapour in the humid air. This physical phenomena can have significant effects on the level of performance of the application. Also, the influence of calculating the  More>>
Authors:
Publication Date:
Dec 31, 1996
Product Type:
Thesis/Dissertation
Report Number:
LTKK-TJ-56
Reference Number:
SCA: 330103; PA: FI-97:003329; EDB-97:061646; NTS-97:010233; SN: 97001773858
Resource Relation:
Other Information: TH: Thesis (D. Tech.); PBD: 1996
Subject:
33 ADVANCED PROPULSION SYSTEMS; TURBOMACHINERY; BRAYTON CYCLE POWER SYSTEMS; HEAT PUMPS; REFRIGERATING MACHINERY; COMPRESSORS; ELECTRIC MOTORS; GAS BEARINGS
OSTI ID:
464548
Research Organizations:
Lappeenranta Univ. of Technology (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE97740706; ISBN 951-764-089-7; TRN: FI9703329
Availability:
OSTI as DE97740706
Submitting Site:
FI
Size:
114 p.
Announcement Date:

Citation Formats

Backman, J. On the reversed Brayton cycle with high speed machinery. Finland: N. p., 1996. Web.
Backman, J. On the reversed Brayton cycle with high speed machinery. Finland.
Backman, J. 1996. "On the reversed Brayton cycle with high speed machinery." Finland.
@misc{etde_464548,
title = {On the reversed Brayton cycle with high speed machinery}
author = {Backman, J}
abstractNote = {This work was carried out in the laboratory of Fluid Dynamics, at Lappeenranta University of Technology during the years 1991-1996. The research was a part of larger high speed technology development research. First, there was the idea of making high speed machinery applications with the Brayton cycle. There was a clear need to deepen the knowledge of the cycle itself and to make a new approach in the field of the research. Also, the removal of water from the humid air seemed very interesting. The goal of this work was to study methods of designing high speed machinery for the reversed Brayton cycle, from theoretical principles to practical applications. The reversed Brayton cycle can be employed as an air dryer, a heat pump or a refrigerating machine. In this research the use of humid air as a working fluid has an environmental advantage, as well. A new calculation method for the Brayton cycle is developed. In this method especially the expansion process in the turbine is important because of the condensation of the water vapour in the humid air. This physical phenomena can have significant effects on the level of performance of the application. Also, the influence of calculating the process with actual, achievable process equipment efficiencies is essential for the development of future machinery. The above theoretical calculations are confirmed with two different laboratory prototypes. (53 refs.)}
place = {Finland}
year = {1996}
month = {Dec}
}