Numerical investigation of rock-pile based waste heat storage for remote communities in cold climates

Amiri, Leyla; Brito, Marco Antonio Rodrigues de; Baidya, Durjoy; Kuyuk, Ali Fahrettin; Ghoreishi‐Madiseh, Seyed Ali; Sasmito, Agus P.; Hassani, Ferri

doi:10.1016/j.apenergy.2019.113475

Cited by 26 publications

(18 citation statements)

References 40 publications

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“…Using the thermodynamic model for the system developed in our previous work [4] [13], the thermodynamic equations for the DEHR system are solved in a daily basis resulting in values for heat needed, heat saved and heat discarded. Then, based on those results also in a daily basis, the calculations for heat delivery (during summer) and heat recovery (during winter) from the STES system are performed.…”

Section: Methodsmentioning

confidence: 99%

“…The heat is fully stored on the rockpile when available and fully recovered when necessary. The losses are modeled and compiled in a seasonal heat loss term, here considered 10% over six months for the base scenario as suggested in [13]. The duration of the charging and the discharging period are functions of heating degree-days (~2034), setpoint temperature (4 °C), airflow (708 m 3 /s) and the annual power generation (18 MW) of the mine.…”

Section: Methodsmentioning

confidence: 99%

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Techno-Economic Assessment of Integrating Thermal Energy Storage with Diesel Exhaust Waste Heat Recovery System for Remote Mines in Cold Climates

Baidya,

Brito,

Ghoreishi-Madiseh*

2020

Preprint

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Techno-Economic Assessment of Integrating Thermal Energy Storage with Diesel Exhaust Waste Heat Recovery System for Remote Mines in Cold Climates

Baidya,

Brito,

Ghoreishi-Madiseh*

2020

Preprint

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“…The most common practices include absorption cooling, district heating, and direct and/or indirect power generation [7,11,12]. Although several factors can affect selection of the best method, an overview of available techniques presents district heating as the most viable approach for waste heat recovery in data center.…”

Section: Mw Comprising 250 Sets Of Cabinets Withmentioning

confidence: 99%

Techno-Economic Analysis of Waste Heat Utilization in Data Centers: Application of Absorption Chiller Systems

et al. 2021

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Modern data centers are playing a pivotal role in the global economic situation. Unlike high-quality source of waste heat, it is challenging to recover the decentralized and low-quality waste heat sourced from data centers due to numerous technological and economic hurdles. As such, it is of the utmost importance to explore possible pathways to maximize the energy efficiency of the data centers and to utilize their heat recovery. Absorption chiller systems are a promising technology for the recovery of waste heat at ultra-low temperatures. In fact, the low temperature heat discharged from data centers cannot be retrieved with conventional heat recovery systems. Therefore, the present study investigated feasibility of waste heat recovery from data centers using an absorption chiller system, with the ultimate goal of electrical energy production. To fulfill this objective, a techno-economic assessment of heat recovery using absorption chiller (AC) technique for the data centers with power consumption range of 4.5 to 13.5 MW is performed. The proposed AC system enables saving electricity for the value of 4,340,000 kWh/year and 13,025,000 kWh/year leading to an annual reduction of 3068 and 9208 tons CO2 equivalent of greenhouse gas (GHG) emissions, respectively. The results of this study suggest an optimum change in the design of the data center while reducing the payback period for the investors.

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“…Different types of renewable and waste heat recovery systems have been tried and used in these mining sites. However, due to the high initial investment cost of complex heat recovery systems and the intermittent nature of renewable energy sources, such systems have not been popular 3–6 . Hence there is a need for cost‐effective and simple energy solutions.…”

Section: Introductionmentioning

confidence: 99%

“…However, due to the high initial investment cost of complex heat recovery systems and the intermittent nature of renewable energy sources, such systems have not been popular. [3][4][5][6] Hence there is a need for cost-effective and simple energy solutions.…”

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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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Numerical investigation of rock-pile based waste heat storage for remote communities in cold climates

Cited by 26 publications

References 40 publications

Techno-Economic Assessment of Integrating Thermal Energy Storage with Diesel Exhaust Waste Heat Recovery System for Remote Mines in Cold Climates

Techno-Economic Assessment of Integrating Thermal Energy Storage with Diesel Exhaust Waste Heat Recovery System for Remote Mines in Cold Climates

Techno-Economic Analysis of Waste Heat Utilization in Data Centers: Application of Absorption Chiller Systems

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

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