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Technical Brief

Performance Improvements in Cooker-Top Gas Burners for Small Aspect Ratio Changes

[+] Author and Article Information
Robson L. Silva

Energy and Mechanical Engineering,
Grande Dourados Federal University,
Road MS-270 (Dourados-Itahum), km 12,
Mail Box 533,
Dourados, MS 79.804-970, Brazil
e-mail: rlealsilva@hotmail.com

Bruno V. Sant′Ana, José R. Patelli, Jr.

Energy and Mechanical Engineering,
Grande Dourados Federal University,
Road MS-270 (Dourados-Itahum), km 12,
Mail Box 533,
Dourados, MS 79.804-970, Brazil

Marcelo M. Vieira

Mechanical Engineering,
Mato Grosso Federal University,
Road MT-270 (Rondonópolis-Guiratinga), km 06,
Rondonópolis, MT, 78.735-901, Brazil

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received October 10, 2016; final manuscript received March 17, 2017; published online May 9, 2017. Assoc. Editor: Amir Jokar.

J. Thermal Sci. Eng. Appl 9(4), 044503 (May 09, 2017) (6 pages) Paper No: TSEA-16-1290; doi: 10.1115/1.4036362 History: Received October 10, 2016; Revised March 17, 2017

This paper aims to identify performance improvements in cooker-top gas burners for changes in its original geometry, with aspect ratios (ARs) ranging from 0.25 to 0.56 and from 0.28 to 0.64. It operates on liquefied petroleum gas (LPG) and five thermal power (TP) levels. Considering the large number of cooker-top burners currently being used, even slight improvements in thermal performance resulting from a better design and recommended operating condition will lead to a significant reduction of energy consumption and costs. Appropriate instrumentation was used to carry out the measurements and methodology applied was based on regulations from INMETRO (CONPET program for energy conversion efficiency in cook top and kilns), ABNT (Brazilian Technical Standards Normative) and ANP—National Agency of Petroleum, Natural Gas (NG) and Biofuels. The results allow subsidizing recommendations to minimum energy performance standards (MEPS) for residential use, providing also higher energy conversion efficiency and/or lower fuel consumption. Main conclusions are: (i) Smaller aspect ratios result in the same heating capacity and higher efficiency; (ii) higher aspect ratios (original burners) are fuel consuming and inefficient; (iii) operating conditions set on intermediate are lower fuel consumption without significant differences in temperature increases; (iv) Reynolds number lower than 500 provides higher efficiencies.

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References

Figures

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Fig. 1

Experimental apparatus, TP levels (handle position selector) and Brazilian label

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Fig. 2

Burner—top and frontal views

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Fig. 3

Heating capacity tests on β burners—water temperature increases at different TP conditions

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Fig. 4

Nominal thermal power behavior—Burners “α” (left) and β (right)

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Fig. 5

Thermal efficiency changes for different handle position selection

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Fig. 6

Reynolds influence on efficiency (heating test)

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