Development of rock sensible heat storage system: Modeling of a hematite reservoir

Santos, Andreia; Almeida, Fernando; Neto, Fernando

doi:10.1016/j.est.2021.102818

Cited by 20 publications

(4 citation statements)

References 12 publications

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“…Additionally, to calculate the density and porosity of the rock material, it was necessary to weigh a sample from each lot that was heated with a cylinder with 0.23 m in height and 0.11 m in diameter, i.e., with a volume of 0.002186 m 3 . The porosity (Ø) was calculated using the following Equation (1), where the density of the aggregate (ρ a ) was obtained in the previous step, and the average density of the hematite ore ( ρ s ) was calculated using the Jolly scale and 3970 kg/m 3 [36].…”

Section: Methodsmentioning

confidence: 99%

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Physical and Thermal Properties Analysis of Hematite for Thermal Heat Storage

2022

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Energy sustainability represents an important research topic for aiding decreasing energy dependence and slowing down climate changes. In this context, solutions using thermal energy storage through rock start to emerge, due to its natural benefits, when compared to more polluting alternatives. To understand whether a rock material can be considered a good thermal energy storage material for such solutions, it is necessary to evaluate the physical, chemical and thermal properties of such materials. Therefore, it becomes essential to understand how heat propagates in the rock and how voids influence the thermal properties. To achieve these goals, hematite ore from Moncorvo, Northeastern Portugal was used, in particular, to study the effect of grain size on thermal properties for three different sized lots. Chemical and physical changes between heated and unheated lots were detected using X-ray diffraction and particle size, as well as X-ray fluorescence analysis. Regarding thermal properties, a hot wire method approach was used with seven thermocouples. Additionally, a thermal inversion model to simulate the heat exchanges was also proposed, allowing changing the properties of the constituents, to fit the theoretical and experimental temperature curve. Furthermore, the model reveals how heat propagates inside the reservoir filled with hematite ore.

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Section: Methodsmentioning

confidence: 99%

“…In recent years, the challenges associated with energy sustainability have been key aspects of the research agenda, and with it, several ideas/projects have started to emerge, with the aim of producing or managing energy, focusing on decrease energy dependence, while also helping to slow down climate changes [1].…”

Section: Introductionmentioning

confidence: 99%

Physical and Thermal Properties Analysis of Hematite for Thermal Heat Storage

2022

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“…Today, the direction associated with the design and production of tractors with an electric drive has received active development [1][2][3][4]. This direction involves the production of electric tractors with high traction characteristics, as well as ensuring minimal damage to the environment and the health of the operator.…”

Section: Introductionmentioning

confidence: 99%

Mobile charging station for electric tractors

Nesterenko,

Karnaukhov

et al. 2024

BIO Web Conf.

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The paper examines the issues of providing electrical energy to tractors operating on electric traction. Problems associated with the lack of infrastructure necessary for charging and recharging traction batteries are described. The rationale for the operation of electric tractors in agriculture is given. The article provides an overview of the available types of charging stations, their advantages and disadvantages, as well as some technical characteristics. The development and use of mobile charging stations for charging and recharging traction batteries of electric tractors directly in the field is substantiated. The main results provide information about the designed mobile charging station. The article contains a description of the design and composition of a mobile charging station, through which traction batteries are charged directly in the field. The rationale for choosing the type of charging station and the method of supplying it with electrical energy is presented. Particular attention is paid to the rational choice of storage batteries that will be located in the charging station. An assessment of the used rechargeable batteries is carried out, their main advantages and disadvantages are given, as well as the type of batteries chosen for use is justified.

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“…quartzite [15]), are investigated in several studies. Furthermore, monomineralic materials such as magnetite [31] or hematite [32], found as a primary mineral or as an alteration product, are promising in particular due to their high density. While an extensive review of natural rocks for sensible TES is provided by Allen et al [33] or Alami et al [34], waste material such as induction furnace slags [35], demolition waste [36], recycled ceramic [37], copper slags [38], steel slags [39] and electronic arc furnace slags [40] are also the subject of topical discussions.…”

Section: Introductionmentioning

confidence: 99%