Energy efficiency calculation of gas burners for domestic stoves with a heat transfer intensifier made of different metal materials

Аuthors

Badanov N. S.

Kazan National Research Technical University named after A.N. Tupolev, Kazan, Russia

Abstract

The paper is devoted to modern scientific investigations in the area of gas burners for, first of all, domestic usage. A brief analysis of scientific references has recently carried out and shown that there are some research of gas burners containing a heat transfer intensifier in a gas-supply channel.
This year new series of experiments were successfully conducted by using gas burners of one domestic stove “Gefest 1200”. While doing it, a state gas burner and an improved one were used. The modernized constructive scheme of a gas burner had a special metal rod with a thread on its surface that was installed on a lid and was inside a gas-supply channel with a form of a diffusor. During this experimental study it was found out that the metal rod with the thread can really enhance heat transfer and, additionally, increase energy efficiency. Several types of metal rods were used including short ones made of stainless steel and long ones made of pure copper. Now it is absolutely clear that copper rods can give out more heat and have more energy efficiency in comparison with steel rods. In addition, the results showed that a length could make influence on economy of burning natural gas because the longer a rod, the less natural gas was needed. The level of energy efficiency was calculated based on data of a volume of heated fresh water, a volume of burnt natural gas, masses of a vessel and water inside, specific heats of water and metals, heat conductivities of metal materials, a lower heat of burning of gas, difference of temperatures to reach the boiling temperature.
At the end of research, new scientific graphs were created to show the influence of a length and heat conductivities of metal rods. Also, one area of possible rods with heat intensifiers such as a thread on heated surface was obtained, which can inevitably lead to the better understanding, inventing and development of new energy-efficient gas burners by engineers and scientists.

Keywords:

gas burner, heat transfer intensifier, natural gas, energy efficiency, fresh water

References

1. https://svspb.net/novosti/stoimosti-gaza/
2. Altunin K.V. Gazovaya gorelka [Gas burner]. Patent RF na poleznuyu model №129600_ F23D14/20_ Opubl. 27.06.2013. Byul. №18.
3. Altunin K.V. Gas burner with improved economical efficiency. Journal of Engineering Physics and Thermophysics. Vol. 90_ №2_ March_ 2017. pp. 480_483.
4. GOST 33859-2016. Energeticheskaya effektivnost'. Zharochnye shka-fy, varochnye paneli i vozduhoochistiteli bytovye i analogichnogo pri-meneniya. Proektirovanie s uchetom vozdejstviya na okruzhayushchuyu sredu (Mezhgosudarstvennyj standart) [Energy efficiency. Roasters, cooktops and air purifiers for domestic and similar applications. Design taking into account the environmental impact (The interstate standard). – M.: Standartinform, 2019. – 20 s.
5. Ametistov E.V., Grigor'ev V.A., Emcev B.T. i dr. Teplo- i massoobmen. Teplotekhnicheskij eksperiment: spravochnik. [Heat and Mass Transfer. Heta Transfer Experiment: Reference Book]. – M.: Energoizdat, 1982. 512 s.
6. Vargaftik N.B. Spravochnik po teplofizicheskim svojstvam gazov i zhidkostej [Handbook of thermophysical properties of gases and liquids]. – M.: OOO Stars, 2006. 720 s.