Can hydrogen enriched biogas be used as domestic fuel?-part i – thermal characteristics of blended biogas/h2 impinging flames

Yi Chen; Udaya Kahangamage; Quan Zhou; Chun Wah Leung

doi:10.33430/v28n2thie-2020-0040

Can hydrogen enriched biogas be used as domestic fuel?-part i – thermal characteristics of blended biogas/h₂ impinging flames

Yi Chen, Udaya Kahangamage, Quan Zhou, Chun Wah Leung

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Biogas is a renewable energy source widely produced by breakdowns of organic matters in natural environment and industry. However, it is not yet an ideal replacement of fossil fuels because its high CO₂ content would deteriorate its thermal performance. To upgrade biogas for possible domestic application, hydrogen enrichment is proposed by adding high-grade hydrogen (H₂) to biogas in order to improve its flammability and heating value, and reduce pollutant emission. However, most previous studies on blended Biogas/H₂ focus on analysing the effects of H₂ fraction and nozzle-to-plate distance on the heat flux profile and flame temperature. No comprehensive study has ever demonstrated the influence of the Reynolds number and equivalence ratio under a wide operating range. In this study, a test rig was built to investigate the effects of the Reynolds number and equivalence ratio on heat flux and thermal efficiency of blended biogas/H₂ impinging flame. The blended biogas/H₂ consisted of 80% biogas and 20% H₂ addition in volume. Biogas was artificially made by 60% CH₄ and 40% CO₂ (BG₆₀). The Reynolds number ranges from 300 to 1500 and equivalence ratio ranges from 1 to 3. A comparative study was also conducted between pure biogas (BG₆₀) and biogas with 20% H₂ enrichment.

Original language	English
Pages (from-to)	60-67
Number of pages	8
Journal	HKIE Transactions Hong Kong Institution of Engineers
Volume	28
Issue number	2
DOIs	https://doi.org/10.33430/v28n2thie-2020-0040
Publication status	Published - 30 Jun 2021

Keywords

Blended biogas/H
Equivalence ratio
Heat flux
Reynolds number
Thermal characteristic
Thermal efficiency

Access to Document

10.33430/v28n2thie-2020-0040

Cite this

@article{2c12bef808be424cad35d4408571e410,

title = "Can hydrogen enriched biogas be used as domestic fuel?-part i – thermal characteristics of blended biogas/h2 impinging flames",

abstract = "Biogas is a renewable energy source widely produced by breakdowns of organic matters in natural environment and industry. However, it is not yet an ideal replacement of fossil fuels because its high CO2 content would deteriorate its thermal performance. To upgrade biogas for possible domestic application, hydrogen enrichment is proposed by adding high-grade hydrogen (H2) to biogas in order to improve its flammability and heating value, and reduce pollutant emission. However, most previous studies on blended Biogas/H2 focus on analysing the effects of H2 fraction and nozzle-to-plate distance on the heat flux profile and flame temperature. No comprehensive study has ever demonstrated the influence of the Reynolds number and equivalence ratio under a wide operating range. In this study, a test rig was built to investigate the effects of the Reynolds number and equivalence ratio on heat flux and thermal efficiency of blended biogas/H2 impinging flame. The blended biogas/H2 consisted of 80% biogas and 20% H2 addition in volume. Biogas was artificially made by 60% CH4 and 40% CO2 (BG60). The Reynolds number ranges from 300 to 1500 and equivalence ratio ranges from 1 to 3. A comparative study was also conducted between pure biogas (BG60) and biogas with 20% H2 enrichment.",

keywords = "Blended biogas/H, Equivalence ratio, Heat flux, Reynolds number, Thermal characteristic, Thermal efficiency",

author = "Yi Chen and Udaya Kahangamage and Quan Zhou and Leung, {Chun Wah}",

note = "Publisher Copyright: {\textcopyright} 2021 The Hong Kong Institution of Engineers.",

year = "2021",

month = jun,

day = "30",

doi = "10.33430/v28n2thie-2020-0040",

language = "English",

volume = "28",

pages = "60--67",

journal = "HKIE Transactions Hong Kong Institution of Engineers",

issn = "1023-697X",

publisher = "Hong Kong Institution of Engineers",

number = "2",

}

TY - JOUR

T1 - Can hydrogen enriched biogas be used as domestic fuel?-part i – thermal characteristics of blended biogas/h2 impinging flames

AU - Chen, Yi

AU - Kahangamage, Udaya

AU - Zhou, Quan

AU - Leung, Chun Wah

PY - 2021/6/30

Y1 - 2021/6/30

N2 - Biogas is a renewable energy source widely produced by breakdowns of organic matters in natural environment and industry. However, it is not yet an ideal replacement of fossil fuels because its high CO2 content would deteriorate its thermal performance. To upgrade biogas for possible domestic application, hydrogen enrichment is proposed by adding high-grade hydrogen (H2) to biogas in order to improve its flammability and heating value, and reduce pollutant emission. However, most previous studies on blended Biogas/H2 focus on analysing the effects of H2 fraction and nozzle-to-plate distance on the heat flux profile and flame temperature. No comprehensive study has ever demonstrated the influence of the Reynolds number and equivalence ratio under a wide operating range. In this study, a test rig was built to investigate the effects of the Reynolds number and equivalence ratio on heat flux and thermal efficiency of blended biogas/H2 impinging flame. The blended biogas/H2 consisted of 80% biogas and 20% H2 addition in volume. Biogas was artificially made by 60% CH4 and 40% CO2 (BG60). The Reynolds number ranges from 300 to 1500 and equivalence ratio ranges from 1 to 3. A comparative study was also conducted between pure biogas (BG60) and biogas with 20% H2 enrichment.

AB - Biogas is a renewable energy source widely produced by breakdowns of organic matters in natural environment and industry. However, it is not yet an ideal replacement of fossil fuels because its high CO2 content would deteriorate its thermal performance. To upgrade biogas for possible domestic application, hydrogen enrichment is proposed by adding high-grade hydrogen (H2) to biogas in order to improve its flammability and heating value, and reduce pollutant emission. However, most previous studies on blended Biogas/H2 focus on analysing the effects of H2 fraction and nozzle-to-plate distance on the heat flux profile and flame temperature. No comprehensive study has ever demonstrated the influence of the Reynolds number and equivalence ratio under a wide operating range. In this study, a test rig was built to investigate the effects of the Reynolds number and equivalence ratio on heat flux and thermal efficiency of blended biogas/H2 impinging flame. The blended biogas/H2 consisted of 80% biogas and 20% H2 addition in volume. Biogas was artificially made by 60% CH4 and 40% CO2 (BG60). The Reynolds number ranges from 300 to 1500 and equivalence ratio ranges from 1 to 3. A comparative study was also conducted between pure biogas (BG60) and biogas with 20% H2 enrichment.

KW - Blended biogas/H

KW - Equivalence ratio

KW - Heat flux

KW - Reynolds number

KW - Thermal characteristic

KW - Thermal efficiency

UR - http://www.scopus.com/inward/record.url?scp=85110150984&partnerID=8YFLogxK

U2 - 10.33430/v28n2thie-2020-0040

DO - 10.33430/v28n2thie-2020-0040

M3 - Article

AN - SCOPUS:85110150984

SN - 1023-697X

VL - 28

SP - 60

EP - 67

JO - HKIE Transactions Hong Kong Institution of Engineers

JF - HKIE Transactions Hong Kong Institution of Engineers

IS - 2