Diesel generator exhaust heat recovery fully-coupled with intake air heating for off-grid mining operations: An experimental, numerical, and analytical evaluation

Baidya, Durjoy; Brito, Marco Antonio Rodrigues de; Sasmito, Agus P.; Ghoreishi‐Madiseh, Seyed Ali

doi:10.1016/j.ijmst.2021.10.013

Cited by 11 publications

(6 citation statements)

References 49 publications

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“…The conceptual design proposed in Figure 1 would require cooling the exhaust with an exhaust heat recovery system [41][42][43] and transporting the exhaust from the power plant to the dry stack TSF through a pipeline (Transport-1). We propose that the exhaust could then be injected into an array of perforated pipes buried in deposited filtered tailings to ensure the consistent delivery of CO 2 .…”

Section: Conceptual Designmentioning

confidence: 99%

A Reduced-Order Fluid Flow Model for Gas Injection into Porous Media: For Application in Carbon Sequestration in Mine Tailings

et al. 2023

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One method to accelerate carbon sequestration within mine tailings from remote mines involves the injection of diesel generator exhaust into dry stack tailings. The techno-economic feasibility of this approach heavily depends on understanding the flow characteristics inside the perforated injection pipes embedded within the tailings. Two distinctive yet dynamically coupled transport phenomena were identified and evaluated: (i) gas transport inside the pipe and (ii) gas injection into the porous body of the tailings. This paper presents two models to investigate these transport phenomena, a three-dimensional (3D) and a one-plus-one-dimensional (1 + 1)D model. An experimental investigation of the pressure profile through the injection pipe was carried out to validate the models at the experimental scale. To apply the (1 + 1)D model to larger scales, the results were compared with those of the 3D model, as the (1 + 1)D model required significantly less computational resources and time. To include the effect of the perforations in the pipe on the pressure profile of the (1 + 1)D model, an analytical fluid velocity profile was developed in relation to geometric and physical parameters. The performance of the (1 + 1)D model with an impact factor was then evaluated against the 3D model results for the inlet pressure, pressure profile and gas outflow distribution under various conditions than those investigated experimentally. The developed (1 + 1)D model can be used to design an energy-efficient approach for large-scale implementation with a wide range of desired operating parameters.

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Section: Conceptual Designmentioning

confidence: 99%

A Reduced-Order Fluid Flow Model for Gas Injection into Porous Media: For Application in Carbon Sequestration in Mine Tailings

et al. 2023

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“…This conceptual design requires the cooling of the exhaust by using an exhaust heat recovery system (EHRS) that was discussed thoroughly in Refs. [ [23] , [24] , [25] ]. Transport-

denotes the transportation of the diesel exhaust from the EHRS to the tailings bed through a designated pipeline.…”

Section: Methodsmentioning

confidence: 99%

A techno-economic analysis of diesel exhaust injection into mine tailings for carbon sequestration

Baidya,

Dipple,

Ghoreishi-Madiseh

2024

Heliyon

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“…As a result, the mining industry has been relying on fossil fuel systems for the heating and cooling of mines. These fossil fuels mainly include diesel and natural gas 1 . The major problem with using fossil fuels is the emissions created by them and the higher energy cost per kWh that the mining company has to bear to ventilate the mine 2 .…”

Section: Introductionmentioning

confidence: 99%

“…These fossil fuels mainly include diesel and natural gas. 1 The major problem with using fossil fuels is the emissions created by them and the higher energy cost per kWh that the mining company has to bear to ventilate the mine. 2 Over the last 5 decades, this cost has grown exponentially high, and the mining industry is looking at alternatives for the production of power as well as energy storage.…”

mentioning

confidence: 99%

Numerical investigation of large‐scale seasonal rock‐pit energy storage system

Pinto

Dandagawhal²,

Sasmito

et al. 2023

Heat Trans

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A twodimensional axisymmetric model, which is computationally inexpensive, has been proposed to predict the property changes that occur in a seasonal rock‐pit energy storage (RPES) system. The geometry of the rock‐pit has been simplified into a shape that can be extended for any seasonal storage system with a three‐dimensional conical geometry. The computational domain has been solved using both linear thermal equilibrium (LTE) and linear thermal non‐equilibrium (LTNE) models, and the former has been found to be computationally quick and accurate. The model has predicted a 95% energy saving at the highest flow conditions required in the mine. Further analysis has suggested that the increase in storage capacity by decreasing the porosity of rocks in the rock‐pit is insignificant compared to the corresponding increase in fan power. Furthermore, the investigation done on natural rocks has indicated an increased ability to store heat in the rock‐pit when rocks with higher thermal mass have been used. The use of RPES has shown a significant potential to reduce the carbon footprint. Finally, an economic analysis done on the system has shown a return on investment of just under 12 years.

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Diesel generator exhaust heat recovery fully-coupled with intake air heating for off-grid mining operations: An experimental, numerical, and analytical evaluation

Cited by 11 publications

References 49 publications

A Reduced-Order Fluid Flow Model for Gas Injection into Porous Media: For Application in Carbon Sequestration in Mine Tailings

A Reduced-Order Fluid Flow Model for Gas Injection into Porous Media: For Application in Carbon Sequestration in Mine Tailings

A techno-economic analysis of diesel exhaust injection into mine tailings for carbon sequestration

Numerical investigation of large‐scale seasonal rock‐pit energy storage system

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