Thermodynamic analysis of operating strategies for waste heat recovery of combined heating and power systems

Wang, Shukun; Liu, Zuming; Liu, Chao; Wang, Xiaonan

doi:10.1016/j.energy.2022.124803

Cited by 15 publications

(4 citation statements)

References 38 publications

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“…Many buildings produce waste heat, such as hotels that need to have a readily available supply of hot water and to have the rooms and public spaces at comfortable temperatures [156], or large kitchens and food production sites that would be producing waste heat from cooking [157,158]. These sources may not produce much waste heat when compared to the petrochemical industry or a constant and predictable heat supply like a data centre, however, these businesses focus on feeding fresh food to their patrons, and the novelty of producing their own ingredients on site could create a symbiotic relationship between the vertical farming business and the catering business supplying the waste heat and using the produce [159].…”

Section: Discussionmentioning

confidence: 99%

Assessment of the Potential to use the Expelled Heat Energy from a Typical Data Centre in Ireland for Alternative Farming Methods

Borland¹,

Harty²,

McDonnell³

2023

Preprint

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Data centres, though a necessary part of modern society, are being stigmatised for consuming vast amounts of electricity for their operational and cooling needs. Due to Ireland’s reliance on fossil fuels to meet the increased energy demand of data centres, the data centres are contributing significantly to Ireland’s total carbon emissions. As much of this energy is expelled from data centres as waste heat energy, the potential for recycling some of this wasted heat energy was explored using environmentally friendly systems from recent publications. The recovered waste heat energy was applied in a vertical farming system, and the benefits of this waste heat to the vertical farm were analysed and quantified in two scenarios. Using conservative estimates, it was predicted that each vertical farm could be between 5-23% the size of the data centre and produce enough food to feed between 14-61 adults their daily calorie needs, and between 13-58 people their daily fresh produce requirements, depending on the scenario applied. For a more accurate prediction, each vertical farm would have to be assessed on a case-by-case basis. However, there was not enough data available on Irish data centres to perform these calculations.

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Section: Discussionmentioning

confidence: 99%

Assessment of the Potential to use the Expelled Heat Energy from a Typical Data Centre in Ireland for Alternative Farming Methods

Borland¹,

Harty²,

McDonnell³

2023

Preprint

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“…The fluid dictates the amount of energy produced, expended, and lost by the system (post exhaust heat). Multiple working fluids have been tested to define and measure the parameters of each of the fluids, with the most common fluids being R123, R134a and R245fa [5,6]. The fluids were most likely used due to their higher measured exergy, thermal and isentropic efficiencies, along with the other parametric values such as critical temperature, density, and heat of vaporization.…”

Section: Standard Orc Configurationmentioning

confidence: 99%

Design and Analysis of Waste Heat Recovery Systems for Automotive Applications

2024

IRJMETS

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The automotive industry is currently undergoing a significant transition towards sustainable and energyefficient technologies, driven by environmental concerns and the desire to enhance overall vehicle performance. This thesis is dedicated to the detailed design and analysis of waste heat recovery systems specifically tailored for automotive applications. Waste heat, a consequential byproduct of internal combustion engines, represents an underutilized resource with the potential to significantly enhance fuel efficiency and reduce emissions. This research delves into innovative strategies to harness and effectively integrate waste heat into automotive systems.In the realm of motor vehicles, a substantial 60-70% of overall fuel energy is dissipated, primarily through heated exhaust gases and engine coolant, accounting for 90% of an engine's thermal output. The implementation of systems designed to recover this wasted energy holds the key to improving the fuel efficiency and environmental impact of vehicles. This meta-study systematically explores current waste heat recovery (WHR) methods, both in production and research phases. A comprehensive comparison is drawn between the thermodynamic viability of each proposed system, offering insights into future strategies to maximize the efficiency of WHR systems. Notable technologies under consideration include the organic Rankine cycle (ORC), thermoelectric generators (TEG), and regenerative braking.The primary objective of this paper is to analyze the current state of research on waste heat recovery in vehicles, laying the foundation for further exploration and investigation in the field. The results of the study point towards a promising future for the extensive examination of ORCs in WHR for internal combustion engines (ICE) in vehicles. This is attributed to the diverse design opportunities presented by ORCs, including multiple loop configurations, the use of different working fluids, and the integration of thermal energy storage devices. Conversely, ongoing research on TEGs indicates a high cost-to-efficiency ratio for the materials required in production, suggesting that TEGs may not be as viable a solution for WHR in vehicles when compared to ORCs.In conclusion, this paper asserts that integrating multiple energy recovery systems can result in a fuel savings ranging from 8% to 19%. The findings provide valuable insights into the current landscape of waste heat recovery research, offering a basis for further studies aimed at advancing the efficiency and sustainability of automotive systems.

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“…Many buildings produce waste heat, such as hotels that need to have a readily available supply of hot water and have the rooms and public spaces at comfortable temperatures [157], or large kitchens and food production sites that would be producing waste heat from cooking [158,159]. These sources may not produce much waste heat when compared to the petrochemical industry or a constant and predictable heat supply like a data centre; however, these businesses focus on feeding fresh food to their patrons, and the novelty of producing their own ingredients on site could create a symbiotic relationship between the vertical farming business and the catering business supplying the waste heat and using the produce [160].…”

Section: Further Applicationsmentioning

confidence: 99%

Assessment of the Potential to Use the Expelled Heat Energy from a Typical Data Centre in Ireland for Alternative Farming Methods

Borland,

McDonnell,

Harty

2023

Energies

View full text Add to dashboard Cite

Data centres, though a necessary part of modern society, are being stigmatised for consuming vast amounts of electricity for their operational and cooling needs. Due to Ireland’s reliance on fossil fuels to meet the increased energy demand of data centres, the data centres are contributing significantly to Ireland’s total carbon emissions. As much of this energy is expelled from data centres as waste heat energy, the potential for recycling some of this wasted heat energy was explored using environmentally friendly systems from recent publications. The recovered waste heat energy was applied in a vertical farming system, and the benefits of this waste heat to the vertical farm were analysed and quantified in two scenarios. Using conservative estimates, it was predicted that each vertical farm could be between 5–23% the size of the data centre and produce enough food to feed between 14–61 adults their daily calorie needs, and between 13–58 people their daily fresh produce requirements, depending on the scenario applied. For a more accurate prediction, each vertical farm would have to be assessed on a case-by-case basis, as there is no current research in this area. However, there was not enough data available on Irish data centres to perform these calculations.

show abstract

Thermodynamic analysis of operating strategies for waste heat recovery of combined heating and power systems

Cited by 15 publications

References 38 publications

Assessment of the Potential to use the Expelled Heat Energy from a Typical Data Centre in Ireland for Alternative Farming Methods

Assessment of the Potential to use the Expelled Heat Energy from a Typical Data Centre in Ireland for Alternative Farming Methods

Design and Analysis of Waste Heat Recovery Systems for Automotive Applications

Assessment of the Potential to Use the Expelled Heat Energy from a Typical Data Centre in Ireland for Alternative Farming Methods

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