A decision support system for waste heat recovery and energy efficiency improvement in data centres

Luo, Yang; Andrésen, John M.; Clarke, Henry; Rajendra, Matthew; Maroto‐Valer, M. Mercedes

doi:10.1016/j.apenergy.2019.05.029

Cited by 43 publications

(15 citation statements)

References 16 publications

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“…Dimensioning the plants to the winter case would not be economically feasible, therefore, storages have to be implemented. As shown in this example, waste heat from offices can help balancing the energy system as well as industrial waste heat [17] or waste heat from data centers [18]. Sector coupling is therefore a key issue towards the realization of heating and cooling grids with renewable and waste heat sources.…”

Section: Pv Is the Only Universally Accessible Electricity Generationmentioning

confidence: 99%

“…PVT is currently a less implemented technology compared to PV and ST, but shows advantages especially in surface efficiency and when using a low temperature, the cooling effect on the PV panels is higher, which increases the electricity output [16]. Other important energy sources are ground water heat, geothermal energy, the heat content of ambient (outside) air, and all sorts of waste heat, e.g., from cooling, industrial processes [17] (often used internally) or data centers [18]. In many cases, these are low-temperature sources and, therefore, are also suitable for cooling purposes.…”

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confidence: 99%

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Integrating Energy Demand and Local Renewable Energy Sources in Smart Urban Development Zones: New Options for Climate-Friendly Resilient Urban Planning

2019

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In recent years, most cities have experienced rapid population growth. Concurrently, international policies have called for substantial reductions of greenhouse gas emissions. Additionally, the resilience of energy-supply systems has become more important. Consequently, solutions to exhaust locally-available sources must be developed to minimize the fraction of fossil fuels for heating, cooling and electricity. This article shows an example of designing a low-temperature heating and cooling grid based on locally-available renewables and waste heat and introduces general hypotheses concerning smart energy planning in urban development zones. Taking an urban development area in Vienna, Austria, as example, it is shown that wastewater, geothermal and (office) waste heat, solar energy, and the heat content of ambient air can play an important role within a climate-friendly urban energy concept and that heating and cooling demand can be covered completely on-site. From an environmental point of view, the concept is promising, as greenhouse gas emissions and the non-renewable primary energy consumption can be reduced by over 70% compared to conventional gas heating, while, based on current (fossil) energy prices, it is economically not fully competitive. The gap could be closed e.g. by CO2 taxes on fossil energy sources or (temporal) subsidies for renewables. Additionally, reservations of stakeholders in the energy sector against this innovative approach must be dismantled.

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Section: Pv Is the Only Universally Accessible Electricity Generationmentioning

confidence: 99%

mentioning

confidence: 99%

Integrating Energy Demand and Local Renewable Energy Sources in Smart Urban Development Zones: New Options for Climate-Friendly Resilient Urban Planning

2019

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“…Cho et al [4] write about an increasing rate of 20% of data center energy consumption per year, because of an annual increase of 13% of servers and 56% of the data storage demand. Based on more recent statistics, in 2017 data centers energy demand has reached 416.2 billion kWh of electricity, which is almost 2% of the world's total electricity consumption [5], and about 2% of the total greenhouse gas emission [6] (respectively 3% and 4% in the industry field [7]).…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of a micro-ORC system for heat recovery from data centers

Ancona

Bianchi

Branchini

et al. 2022

J. Phys.: Conf. Ser.

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In the effort to enhance the recovery of waste energy, data centers are drawing attention because of the huge amount of heat discharged from the computer racks. Organic Rankine cycle (ORC) power systems are a viable solution to exploit servers’ waste heat, as it is available at very low temperatures. The purpose of this study is to assess the feasibility of integrating a micro-ORC system into data centers cooling systems and its potential energy saving. An experimental analysis is carried out on a kW-scale ORC test bench, with R134a as working fluid. Heat is supplied at temperatures and flow rates in the range respectively 40-55 °C and 1.8-5 m3/h, consistently with typical values observed in data centers application, showing the second law efficiency varying between 5% and 13%. Furthermore, a steady-state model of the micro-ORC has been recalibrated and validated against experimental data; the built-in volume ratio of the reciprocating piston expander has been optimized to improve the filling performance of the machine. A parametric analysis, varying the boundary conditions within their range of interest for this application, and the working fluid (R1234yf and R1234ze(E)), shows that a maximum second law efficiency of 30% is achievable with R1234ze(E).

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“…One such research direction is correlated with ways to effectively utilize solar energy, which is accomplished through the implementation of new solutions and improvements in the efficiency of existing devices. Examples of such research have been presented in [10][11][12]. The research conducted to date has been associated with the modification of geometrical features; this approach for improving the efficiency of energy systems has been shown in [13,14].…”

Section: Introductionmentioning

confidence: 99%

On the Correlation between the Geometrical Features and Thermal Efficiency of Flat-Plate Solar Collectors

et al. 2021

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This article presents the results of numerical and experimental studies on the impacts of the selected geometrical features of liquid solar collectors on their thermal efficiency. The experiments were carried out while meeting the requirements of the ISO 9806:2017 standard. Selected changes in the geometrical features were analysed by using fully functional prototypes of modified solar collectors. The correlations between the design and performance properties of the solar collectors were determined in accordance with the changes in the shape of the thermal efficiency η(T*m) curve.

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A decision support system for waste heat recovery and energy efficiency improvement in data centres

Cited by 43 publications

References 16 publications

Integrating Energy Demand and Local Renewable Energy Sources in Smart Urban Development Zones: New Options for Climate-Friendly Resilient Urban Planning

Integrating Energy Demand and Local Renewable Energy Sources in Smart Urban Development Zones: New Options for Climate-Friendly Resilient Urban Planning

Experimental and numerical investigation of a micro-ORC system for heat recovery from data centers

On the Correlation between the Geometrical Features and Thermal Efficiency of Flat-Plate Solar Collectors

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