Renewable-based zero-carbon fuels for the use of power generation: A case study in Malaysia supported by updated developments worldwide

Rahman, Mohammad Nurizat; Wahid, Mazlan Abdul

doi:10.1016/j.egyr.2021.04.005

Cited by 47 publications

(42 citation statements)

References 126 publications

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“…𝐼 𝑖 (𝜌 𝑖 , 𝑋 𝑖 ) = 𝑞 𝑖 𝜂 𝐼𝑖 𝜂 𝐶𝑖 (1) where 𝑞 𝑖 is the particle mass flux, 𝜂 𝐶𝑖 is the sticking probability, 𝜌 𝑖 is the particle density, 𝑋 𝑖 is the particle size, and 𝜂 𝐼𝑖 is the particle impaction efficiency. The particle impaction efficiency is expressed in Eq.…”

Section: Numerical Setupmentioning

confidence: 99%

“…Coal is an important energy source in Malaysia, accounting for over 20 % of the country's total energy supply as of 2019 [1]. The burning of coals, however, will result in major ash-related concerns such as erosion, corrosion, slagging, and fouling, which will eventually lead to a loss in the efficiency of the coal-fired utility boiler, potentially resulting in an unplanned shutdown [2].…”

Section: Introductionmentioning

confidence: 99%

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A Numerical Model for Ash Deposition Based on Actual Operating Conditions of a 700 MW Coal-Fired Power Plant: Validation Feedback Loop via Structural Similarity Indexes (SSIMs)

Rahman

Othman

2022

CFDL

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The combustion of coals will result in significant ash-related issues, which will ultimately lead to the efficiency loss of coal-fired utility boilers. While there have been numerous attempts to predict ash deposition dynamics using numerical approaches, the majority of these models were constructed using experimental data from pilot-scale furnaces and without integration with combustion models. Therefore, the current study collects meaningful power plant data from ash sampling activities at one of Malaysia's 700 MW sub-critical coal-fired power plants, enabling the ash deposition behavior in a real coal-fired utility boiler to be adequately captured and converted into a reliable ash deposition numerical model. The validation feedback loop of the ash deposition model was run using in-situ measurement data (ash sampling picture) and the actual power plant operating conditions during the ash sampling activities. The image processing algorithm was used to determine the degree of similarity between the actual ash sampling image and the predicted ash deposition image from the numerical model. Prior to the validation feedback loop, the overall numerical model (solver, combustion, turbulence, radiation) was successfully validated with the FEGT from the actual power plant, revealing a difference of less than 5 %. The current study found that the baseline ash deposition model (created from experimental data) underestimates the quantity of ash deposition gathered. The validation feedback loop of the baseline ash deposition model successfully established a new set of impaction efficiency constants, which increased the similarity of the images between the actual and predicted ash depositions. The current study's drawback, however, is mostly in the validation basis, which is largely qualitative in nature. Although the Structural Similarity Index (SSIM) value is useful for comparing the similarity of images between actual and predicted ash depositions, a more quantitative measurement that can provide extra meaningful data points and higher accuracy on the deposited ash is preferable. However, based on this modified version of the ash deposition model, the agreement is found to be satisfactory in terms of gaining a rudimentary insight of the ash deposition behavior in a coal-fired boiler.

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Section: Numerical Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Numerical Model for Ash Deposition Based on Actual Operating Conditions of a 700 MW Coal-Fired Power Plant: Validation Feedback Loop via Structural Similarity Indexes (SSIMs)

Rahman

Othman

2022

CFDL

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“…These technologies were not popular at that time, but have been gaining more attention in recent years. Rahman & Wahid [ 48 ] analysed the potential and feasibility of green hydrogen in Malaysia and they argued that as an O&G producer, Malaysia has the advantage of using depleted natural gas reservoirs for hydrogen storage and delivering it through the existing gas network, thus requiring minimal retrofitting. Transporting hydrogen through pipelines will be 10–20 times cheaper and additionally reduce energy losses relative to electricity transmission by cable.…”

Section: Gaps Between the Acf Roadmap And The Generation Development ...mentioning

confidence: 99%

Transitioning to a high renewable net-zero power generation system in Malaysia

Chan

Sopian

2022

Phil. Trans. R. Soc. A.

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Malaysia is a net importer of coal, petroleum products and piped natural gas. Moreover, its primary energy supply is dominated by fossil fuels, at about 93% in total, with coal and natural gas constituting the highest shares in electricity generation. Thus, there is need for Malaysia to take swift action in transitioning to a high renewable energy system for long-term sustainability and meeting its climate action commitment under the Paris Agreement. A net-zero emissions vision guided by a roadmap may effectively motivate and catalyse carbon-free energy deployments. In this paper, we revisit the carbon-free energy roadmap that was developed in 2015 and compare it with the current generation development plan to identify the gaps between them. We argue that the roadmap is still relevant to the net-zero emissions vision; however, we have also identified gaps that merit further research and improvement. The identified gaps mainly relate to more recent data, along with technology and policy developments. Accordingly, we put forward potential research suggestions to bridge these gaps for future development of a roadmap that would assist Malaysia in shaping a long-term plan towards realizing a high renewable net-zero power generation system. This article is part of the theme issue ‘Developing resilient energy systems’.

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“…Malaysia is one of the countries where fuel gas is supplied entirely from oil and gas fields due to the richness of NG resources in Malaysia [1,4]. The NG composition changes greatly from source to source, as well as from time to time within the same source [5].…”

Section: Introductionmentioning

confidence: 99%

Reacting Flow Characteristics and Multifuel Capabilities of a Multi-Nozzle Dry Low NOx Combustor: A Numerical Analysis

Rahman

Yasin

Aris

2021

CFDL

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The fluctuating quality of natural gas (NG) in Peninsular Malaysia (PM) makes it challenging for the gas turbine (GT) combustor to meet the combustion performance requirements from the Original Equipment Manufacturer (OEM). Moreover, the gas quality sensitivity is more apparent in modern dry low NOx (DLN) combustors. Many of the prior combustion investigations were conducted on a modest scale in the laboratory. In actuality, combustion characterizations in complicated DLN combustors are more valuable to the power generation sector. Hence, the current numerical analysis utilized the RANS formulation and a detailed chemistry to examine the impact of ethane (C2H6), carbon dioxide (CO2), and nitrogen (N2) proportions in NG on combustion characteristics in a multi-nozzle DLN (MN-DLN) combustor, with the support of Modified Wobbe Index (MWI) calculations. Validations were performed using the combustor outlet temperature (COT) from the power plant where the actual MN-DLN combustor is operated, which revealed less than 10 % discrepancy. Qualitative validations were carried out by comparing the burn trace from the actual combustor wall to the predicted results, revealing an adequate Structural Similarity Index (SSIM) of 0.43. From numerical results of flame fronts and COTs, the addition of 20 % diluents (CO2 and N2) to NG demonstrated the blowoff risk. When MWIs of Kerteh and the JDA (major NG resources) were used as baselines, MWI ranges of all NG compositions under study surpassed the OEM’s ± 5 % limit. The increase in CO2 proportion results in a wide MWI range, especially when Kerteh is used as the baseline. Therefore, any GTs in PM that have previously been calibrated to use Kerteh's NG are more likely to have combustion instabilities if CO2 levels in NG suddenly increase. The higher MWI range backs up the current numerical results that showed the deleterious effects of a high CO2 composition throughout the combustor firing process. However, increasing the amount of C2H6 by up to 20 % is predicted to have minor effects on combustion characteristics. Overall, the validated numerical model of the MN-DLN combustor provided critical information about combustion characteristics and multifuel capabilities in respect to the NG quality in PM.

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Renewable-based zero-carbon fuels for the use of power generation: A case study in Malaysia supported by updated developments worldwide

Cited by 47 publications

References 126 publications

A Numerical Model for Ash Deposition Based on Actual Operating Conditions of a 700 MW Coal-Fired Power Plant: Validation Feedback Loop via Structural Similarity Indexes (SSIMs)

A Numerical Model for Ash Deposition Based on Actual Operating Conditions of a 700 MW Coal-Fired Power Plant: Validation Feedback Loop via Structural Similarity Indexes (SSIMs)

Transitioning to a high renewable net-zero power generation system in Malaysia

Reacting Flow Characteristics and Multifuel Capabilities of a Multi-Nozzle Dry Low NOx Combustor: A Numerical Analysis

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