Performance optimization of two-stage compressor system using transcritical R744

Research output: Contribution to journalConference article

Abstract

The use of transcritical R744 systems has become increasingly popular in recent years in a variety of different applications. For applications that span a wide temperature range between the heat source and heat sink, the use of two-stage compressor results in numerous advantages in terms of efficiency and compressor discharge temperature. This paper presents experimental data for a transcritical R744 compressor system operating at high heat rejection temperatures. A comprehensive system model was developed and validated with the experimental results. Based on this, the simulation tool was used to further optimize the system design specifically to accommodate the two-stage compression process. The optimum heat transfer area distribution has been determined to simultaneously ensure efficient intercooling at intermediate pressure and gas cooling at the high-pressure level. Simultaneously, the system was also optimized with respect to optimal intermediate pressure and the results show that for this particular system, the optimum intercooler pressure deviated substantially from the standard design approach that uses the geometric mean between suction and discharge pressures.

Original languageEnglish (US)
Article number012034
JournalIOP Conference Series: Materials Science and Engineering
Volume604
Issue number1
DOIs
StatePublished - Sep 3 2019
Event11th International Conference on Compressors and Their Systems 2019 - London, United Kingdom
Duration: Sep 9 2019Sep 11 2019

Fingerprint

Compressors
Heat sinks
Temperature
Gases
Systems analysis
Heat transfer
Cooling
Hot Temperature

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

Performance optimization of two-stage compressor system using transcritical R744. / Elbel, S.; Hrnjak, P.

In: IOP Conference Series: Materials Science and Engineering, Vol. 604, No. 1, 012034, 03.09.2019.

Research output: Contribution to journalConference article

@article{425e5a3afcb54b08931748bbf9757ad2,
title = "Performance optimization of two-stage compressor system using transcritical R744",
abstract = "The use of transcritical R744 systems has become increasingly popular in recent years in a variety of different applications. For applications that span a wide temperature range between the heat source and heat sink, the use of two-stage compressor results in numerous advantages in terms of efficiency and compressor discharge temperature. This paper presents experimental data for a transcritical R744 compressor system operating at high heat rejection temperatures. A comprehensive system model was developed and validated with the experimental results. Based on this, the simulation tool was used to further optimize the system design specifically to accommodate the two-stage compression process. The optimum heat transfer area distribution has been determined to simultaneously ensure efficient intercooling at intermediate pressure and gas cooling at the high-pressure level. Simultaneously, the system was also optimized with respect to optimal intermediate pressure and the results show that for this particular system, the optimum intercooler pressure deviated substantially from the standard design approach that uses the geometric mean between suction and discharge pressures.",
author = "S. Elbel and P. Hrnjak",
year = "2019",
month = "9",
day = "3",
doi = "10.1088/1757-899X/604/1/012034",
language = "English (US)",
volume = "604",
journal = "IOP Conference Series: Materials Science and Engineering",
issn = "1757-8981",
publisher = "IOP Publishing Ltd.",
number = "1",

}

TY - JOUR

T1 - Performance optimization of two-stage compressor system using transcritical R744

AU - Elbel, S.

AU - Hrnjak, P.

PY - 2019/9/3

Y1 - 2019/9/3

N2 - The use of transcritical R744 systems has become increasingly popular in recent years in a variety of different applications. For applications that span a wide temperature range between the heat source and heat sink, the use of two-stage compressor results in numerous advantages in terms of efficiency and compressor discharge temperature. This paper presents experimental data for a transcritical R744 compressor system operating at high heat rejection temperatures. A comprehensive system model was developed and validated with the experimental results. Based on this, the simulation tool was used to further optimize the system design specifically to accommodate the two-stage compression process. The optimum heat transfer area distribution has been determined to simultaneously ensure efficient intercooling at intermediate pressure and gas cooling at the high-pressure level. Simultaneously, the system was also optimized with respect to optimal intermediate pressure and the results show that for this particular system, the optimum intercooler pressure deviated substantially from the standard design approach that uses the geometric mean between suction and discharge pressures.

AB - The use of transcritical R744 systems has become increasingly popular in recent years in a variety of different applications. For applications that span a wide temperature range between the heat source and heat sink, the use of two-stage compressor results in numerous advantages in terms of efficiency and compressor discharge temperature. This paper presents experimental data for a transcritical R744 compressor system operating at high heat rejection temperatures. A comprehensive system model was developed and validated with the experimental results. Based on this, the simulation tool was used to further optimize the system design specifically to accommodate the two-stage compression process. The optimum heat transfer area distribution has been determined to simultaneously ensure efficient intercooling at intermediate pressure and gas cooling at the high-pressure level. Simultaneously, the system was also optimized with respect to optimal intermediate pressure and the results show that for this particular system, the optimum intercooler pressure deviated substantially from the standard design approach that uses the geometric mean between suction and discharge pressures.

UR - http://www.scopus.com/inward/record.url?scp=85073629051&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85073629051&partnerID=8YFLogxK

U2 - 10.1088/1757-899X/604/1/012034

DO - 10.1088/1757-899X/604/1/012034

M3 - Conference article

AN - SCOPUS:85073629051

VL - 604

JO - IOP Conference Series: Materials Science and Engineering

JF - IOP Conference Series: Materials Science and Engineering

SN - 1757-8981

IS - 1

M1 - 012034

ER -