The Performance of an ASHP System Using Waste Air to Recover Heat Energy in a Subway System

Ninikas, Konstantinos; Hytiris, Nicholas; Emmanuel, Rohinton; Aaen, Bjorn

doi:10.3390/cleantechnol1010011

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…The study showed not only the financial benefits, but also the energy and carbon reduction of this trial. The authors in [39] demonstrated that the performance of a typical air source heat pump (ASHP), exploiting a stable air temperature within a subway environment is high, even during the peak heating months.…”

Section: Introductionmentioning

confidence: 99%

Technical and Economic Assessment of Supermarket and Power Substation Waste Heat Integration into Existing District Heating Systems

et al. 2022

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District heating systems are almost always located in densely populated urban areas where various heat sources are available, such as cooling and refrigeration systems in supermarkets, shopping malls, and power transformers. These urban sources often have a large share of waste heat, which is usually emitted into the environment. This waste heat could be used to partially cover the thermal load in district heating systems. The biggest challenge for their integration is the spatial distribution of urban heat sources in relation to the existing heat network and the temporal distribution of the availability of waste heat energy throughout the year. In this paper, we have developed an economic assessment model for the integration of urban heat sources into existing district heating systems. By the hourly merit order of waste heat utilization technologies based on pinch analysis, we have defined the most suitable integration of urban heat sources into existing district heating systems. Different temperature regimes of the urban source and the existing heat network have been considered. Finally, the method was tested on the case study of a supermarket and power substation located in Zagreb, while the sensitivity analysis was carried out with a focus on various technical and economic boundary conditions.

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Section: Introductionmentioning

confidence: 99%

Technical and Economic Assessment of Supermarket and Power Substation Waste Heat Integration into Existing District Heating Systems

et al. 2022

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“…They can transfer heat from natural resources in the human environment, such as air, ground, and water, as well as from sources like industrial or domestic waste [1]. Current research is largely focused on hybrid systems that use heat pumps in combination with solar collectors (SC) or photovoltaic panels (PV) [8][9][10][11][12][13][14], as well as on recovering waste heat and raising its temperature to more useful levels [15][16][17][18][19]. Such solutions allow the increase of energy and economic efficiency of heating and cooling rooms, while bringing significant benefits to the environment.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, Ninikas et al [17] showed the outcome of a trial heating system using waste resources and the importance of a primary energy saving in Glasgow using a water source heat pump (WSHP). In another study [18], Ninikas et al discussed the benefits of an ASHP system for Glasgow. The performance of a typical air source heat pump could be increased significantly in relatively stable air temperature and humidity conditions [19].…”

Section: Introductionmentioning

confidence: 99%

Simulation of the Use of Ground and Air Source Heat Pumps in Different Climatic Conditions on the Example of Selected Cities: Warsaw, Madrid, Riga, and Rome

Ołtarzewska

Krawczyk

2021

Energies

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Heat pumps, an example of one of the most environmentally friendly technologies, can play a key role in the future of sustainable energy. Due to the European Union’s ambitious goals to achieve climate neutrality by 2050, research is currently focused on finding solutions to increase the energy and economic efficiency of heating and cooling with heat pumps to benefit the environment. This paper presents the results of energy simulations for a single-family building located in selected cities—Warsaw (Poland), Madrid (Spain), Riga (Latvia), and Rome (Italy)—as a case study for different climate conditions and energy policy. In each variant, ground and air source heat pumps are considered for heating, cooling, ventilation, and air conditioning (HVAC) purposes. Moreover, we conducted an economic estimation including investment and operating costs, as well as an ecological analysis of carbon dioxide (CO2) emissions. Results show that heat pumps as an energy source for HVAC systems seem to be much more beneficial for Mediterranean-type subtropical climates, than for continental-type climates. The lowest value of total energy demand was obtained in Rome (60 kWh/m2∙rok), while the highest values were recorded in Riga and Warsaw (more than 90 kWh/m2∙rok). In terms of economic and environmental aspects, the use of heat pumps was most advantageous when considering Rome. This paper provides a starting point for further research focusing on increasing the energy and economic efficiency of heat pumps, especially in cold climates, as well as a multi-parameter analysis taking into account national prices, policies regarding development of renewable energy sources, and technical and climatic conditions. It also shows how increasing the share of renewable energy sources (RESs) in the national energy mix contributes to the reduction of CO2 emissions.

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“…The opportunity came about due to GCU's involvement in an academic project looking the potential for district heating systems being fed from energy recovered from water in mine workings in and around Glasgow City Centre. This was of interest to the Strathclyde Partnership Transport (SPT) owing the Glasgow Subway, currently manages and removes (via pumping) large volumes from water that ingresses into the tunnels on a daily basis [1,2]. The water ingress causes dampness, corrosion and defects making it a major contributor to ongoing expensive infrastructure maintenance.…”

Section: Introductionmentioning

confidence: 99%

Review of Sustainable Heat in the Glasgow Subway Tunnels

Hytiris

2020

CERJ

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The Performance of an ASHP System Using Waste Air to Recover Heat Energy in a Subway System

Cited by 6 publications

References 8 publications

Technical and Economic Assessment of Supermarket and Power Substation Waste Heat Integration into Existing District Heating Systems

Technical and Economic Assessment of Supermarket and Power Substation Waste Heat Integration into Existing District Heating Systems

Simulation of the Use of Ground and Air Source Heat Pumps in Different Climatic Conditions on the Example of Selected Cities: Warsaw, Madrid, Riga, and Rome

Review of Sustainable Heat in the Glasgow Subway Tunnels

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