NVH Challenges with Introduction of New Refrigerant HFO-1234yf

Venkatappa, Suhas; Koberstein, Manfred; Liu, Zhengyu

doi:10.4271/2017-01-0172

Cited by 3 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Venkatappa et al analyzed the noise values of R134a and R1234yf refrigerants caused by the refrigerant flow in the compressor in the automotive air conditioning system. As a result of experiments, the noise and vibration energy generated due to flow is significantly higher in R1234yf compared to R134a [10].…”

Section: Introductionmentioning

confidence: 91%

Experimental investigation of the effects of different refrigerants used in the refrigeration system on compressor vibrations and noise

Cingiz

Katircioğlu

Sarıdemir

et al. 2021

International Advanced Researches and Engineering Journal

View full text Add to dashboard Cite

Vibration and noise are undesirable effects in daily life and energy-consuming systems. In this study, the effects of different refrigerants on noise and vibration in a sealed reciprocating compressor are discussed. The study compared the noise and vibration performances of refrigerants with lower ozone depletion potential (ODP) values compared to R22, which has a high ODP value. The study was carried out experimentally in two stages. Firstly, tests were conducted for the coefficient of performance (COP) of different refrigerants. Secondly, vibration and noise data were obtained experimentally for different refrigerants. The results obtained from the experiments showed that both the COP value and the compressor vibration and noise have different values for R22 refrigerant and other alternative refrigerants, but values close to R22 are obtained. It was observed that the compressor noise values and vibration values vary depending on the type of used refrigerant. Average vibration values were determined as 0.604 m/s 2 in R22, 0.603 m/s 2 in R438A, 0.593 m/s 2 in R417A, 0.622 m/s 2 in R422D and 0.637 m/s 2 in R422A. When the noise values are examined, it was measured as 61.327 dB for R22, 62.913 dB for R438A, 62.187 dB for R417A, 63.715 dB for R422D and 64.913 dB for R422A. R417A, which has a 99% similar noise value to R22, was determined as an alternative refrigerant. COP values were found as 4.07 in R22, 3.98 in R438A, 3.63 in R417A, 3.37 in R422D, and 3.18 in R422A. R438A showing 95% similarity for COP can be used as an alternative to R22. Generally, it was observed that the noise and vibration values are very close to each other for all refrigerants examined.

show abstract

Section: Introductionmentioning

confidence: 91%

Experimental investigation of the effects of different refrigerants used in the refrigeration system on compressor vibrations and noise

Cingiz

Katircioğlu

Sarıdemir

et al. 2021

International Advanced Researches and Engineering Journal

View full text Add to dashboard Cite

show abstract

“…Thus, the refrigerant generated the noise during the discharge line, and when the speed of the compressor was higher. Venkatappa et al [5] analyzed two different types of refrigerant, HFC-134a and HFO-1234yf, in order to check the noise induced in an automotive air conditioning system. The authors could demonstrate that there were remarkable differences in the noise generated by the different refrigerants.…”

Section: Introductionmentioning

confidence: 99%

Study of Sound Perception Evaluation in Refrigeration Gases

et al. 2023

View full text Add to dashboard Cite

(1) Background: In the past, sound design was focused on the minimization of the emitted sound, understanding that the lower the sound, the better. Nowadays, this concept is outdated; in addition to the sound pressure level, many more aspects of the sound are considered to fulfil the subjective satisfaction of clients. Thus, a new concept called sound quality has emerged to reach more facets of the sound. In refrigeration systems, the recommendations of European Union are aimed at reducing greenhouse emissions by means of the replacement of the hydrochlorofluorocarbons gases with other less pollutant gases. The refrigeration systems are designed to be used with a specific refrigeration gas, and the noise emitted by these systems is certificated using this refrigeration gas. However, the regularizations have changed, and new refrigerant gases should be used. Considering that these new refrigeration gases work at different pressures, it is possible that the noise could be different with these gases. Moreover, the study of sound quality is very important for the manufacture as the perception and therefore the annoyance could change with the use of new gases. (2) Methods: Two different gases, R-449A and R-134A, have been studied. An acoustic camera has been used to measure and identify the sound quality in the refrigeration systems. (3) Results: The results have shown R-134A has better sound quality than R-449A. (4) Conclusions: This study shows that R-449A and R-134A could be a substitute for R-404A in terms of noise level.

show abstract

The Mechanism of Hissing Noise in the Automotive Cabin and Countermeasures for its Reduction

Itoh

Wang

2019

SAE Technical Paper Series

View full text Add to dashboard Cite

NVH Challenges with Introduction of New Refrigerant HFO-1234yf

Cited by 3 publications

References 2 publications

Experimental investigation of the effects of different refrigerants used in the refrigeration system on compressor vibrations and noise

Experimental investigation of the effects of different refrigerants used in the refrigeration system on compressor vibrations and noise

Study of Sound Perception Evaluation in Refrigeration Gases

The Mechanism of Hissing Noise in the Automotive Cabin and Countermeasures for its Reduction

Contact Info

Product

Resources

About