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An experimental study on the development of multipurpose biomass burner for cooking stove and thermal generator for household application

Suyitno Budhi Muliawan, Ismail, Rahman Reza Abdu

Acta Innovations

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2022

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no. 45

72--81

EN

The present study proposes a novel concept of a solid biomass burner for household applications. The designed biomass stove is a multipurpose burner that can be used as a cooking stove and thermal generator. It works as a basic model of a biomass cooking stove and is coupled with a coil heat exchanger for thermal generation. The experimental evaluation is conducted by using the time-to-boil (TTB) method to measure the effective energy that can be harnessed from the combustion process. It shows that the maximum temperature outlet from the coil heat exchanger is 62.2 °C. The effective energy uptake for the coil heat exchanger is 41.9%, whereas the overall energy uptake, including the kettle, is obtained by more than 50%. Therefore, the proposed model can improve the efficiency of solid biomass burners for household ware.

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Numerical simulations of temperature and velocity fields in the storage tank with the three-coil heat exchanger

Smusz Robert, Wilk Joanna, Bałon Paweł

Advances in Manufacturing Science and Technology

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2020

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Vol. 44, nr 3

74--79

EN

This article presents the results of the numerical investigation of the thermal stratification in the hot water storage tank. The exchanger consists of three tube coils that are immersed in the storage tank of hot water. Two coils - lower and upper - are designed to warm the water in the tank using the water as a heating medium. Another coil - uses the refrigerant for the waste heat transfer. The temperature stratification device is mounted in the thermal storage tank. The device’s task is to improve the thermal stratification level of heated water. The performed numerical simulations allowed us to obtain the temperature and velocity fields in the storage tank under the conditions of the work of coils filled with water. Calculations were made in the case of the use of the stratification device under the operating conditions of the 10.2478/amst-2019-0015upper and lower coils with water.

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Ocena efektywności wymiany ciepła w skraplaczu wężownicowym

Downarowicz D., Gabruś E.

Inżynieria i Aparatura Chemiczna

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2013

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Nr 4

298--299

PL

W pracy przedstawiono analizę wpływu wielkości strumienia, składu i temperatury mieszaniny gazowej na efektywność cieplną skraplacza wężownicowego. Analizę przeprowadzono dla obszaru laminarnego przepływu gazu, w zakresie temperatur -30 do -10°C. Stwierdzono, że efektywność skraplacza wzrasta wraz ze wzrostem prędkości przepływu gazu oraz spadkiem temperatury. Sprawność ta jest większa, gdy mieszanina gazowa zawiera pary 2-propanolu i gdy w wężownicy zachodzi ich kondensacja.

EN

The aim of this work was to investigate an influence of temperature, air flow rate and gas mixture composition on the effectiveness of coil heat exchanger. The studies were performed with air flow rate varying from 3 to 20 dm3/min (laminar flow range). Operating temperatures ranged from -30 to -10°C. The effectiveness increased with increasing air flow rate and decreasing operating temperature. This effectiveness was higher when gas mixture contained 2-propanol vapours condensing in the coil.