City-wide model-based analysis of heat recovery from wastewater using an uncertainty-based approach

Saagi, Ramesh; Arnell, Magnus; Wärff, Christoffer; Ahlström, Marcus; Jeppsson, Ulf

doi:10.1016/j.scitotenv.2022.153273

Cited by 9 publications

(3 citation statements)

References 28 publications

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“…The damping effect was also observed by Golzar and Silveira [67], who used a data-driven model (without a specific focus on private sewers) to quantify the impact of in-building heat recovery on the available heat budget at the WWTP in the city of Stockholm. Confirming the finding, Saagi et al, [68] showed that in-building heat recovery would have a negligible effect on wastewater temperature at the WWTP in the Swedish city of Linköping.…”

Section: Facilitating Knowledge Integration For the Optimization Of D...mentioning

confidence: 69%

How to get your feet wet: Integrating urban water and building engineering for low-energy domestic hot water systems

Hadengue

Morgenroth²,

Larsen³

2022

Energy and Buildings

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Section: Facilitating Knowledge Integration For the Optimization Of D...mentioning

confidence: 69%

How to get your feet wet: Integrating urban water and building engineering for low-energy domestic hot water systems

Hadengue

Morgenroth²,

Larsen³

2022

Energy and Buildings

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“…It is essential to select the heat exchange area so that the heat exchanger operates in a stationary mode for a relatively large part of the total operating time of the shower. Also, the requirement should be specified that the energy-saving measure provides a significant effect within the framework of a separate one-time shower (after a long period of non-use of the shower) [24]. This is because some objects consume hot water in the heat, where the shower works almost constantly or with short breaks (sports complexes, domestic premises, and industrial facilities).…”

Section: Resultsmentioning

confidence: 99%

Determination of the optimal heat exchanger configuration for wastewater heat recovery

Soloveva,

Solovev,

Kunitsky

et al. 2023

E3S Web of Conf.

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The work aims to increase the efficiency of the hot water supply system based on local recovery of the heat of wastewater generated in the shower room for preheating cold water. The work uses mathematical modeling of the thermal operation of the heat exchanger under study. Physical modeling of the heat exchange process between media flows in a heat exchanger was carried out (experimental test). Temperatures of media flows were measured. The temperature distribution inside media flows was compared experimentally with data obtained analytically. In conclusion, an analysis and generalization of the results obtained is made. The result of the research was a designed recovery heat exchanger. Data were obtained on the thermal inertia of the device, i.e., about the required time for the device to achieve a stationary thermal regime from the moment it is turned on. Data were obtained on the potential energy effect from introducing a recovery heat exchanger, taking into account its thermal inertia. The number of showers required to pay off the heat exchanger was calculated. Data were obtained on the influence of changes in the geometric and operating parameters of the heat exchanger on the efficiency of wastewater thermal energy utilization. A methodology for designing a heat exchanger for specific operating conditions was developed. The developed method for designing a recovery heat exchanger allows one to determine the optimal configuration of the device under particular operating conditions and mode of use of the heat exchanger, taking into account its thermal inertia. It is planned to continue the work by assessing the energy and economic effect of using local wastewater heat recovery within the heat supply system of a separate settlement/region.

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“…In gross, the benefits can be depicted particularly in terms of: (a) exhaustive energy consumption (EC) and the questions of renewable sources of energy, (b) mitigation of heat and environmental risks, and (c) the economic burden of operating, protecting, and maintaining the traditional non-natural infrastructure, particularly for water drainage and management. More precisely, these solutions, considered to be urban innovations, stem from interactions between different domains such as: (i) soil-energy interactions, for instance, the geothermic production [5][6][7]; (ii) wastewater-energy interactions, such as the fatal HR [5,8,9]; (iii) green spaces-air temperature interactions: urban cooling, and enhancing air quality [10,11]; (iv) soil-water interactions: water management, flood mitigation, and water recharge [12]; (v) soil-vegetation interactions: carbon storage [10,11], etc.…”

Section: Introductionmentioning

confidence: 99%

Geographically Weighted Regression-Based Predictions of Water–Soil–Energy Nexus Solutions in Île-de-France

et al. 2022

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Due to global urbanization, urban areas are encountering many environmental, social, and economic challenges. Different solutions have been proposed and implemented, such as nature-based solutions and green and blue infrastructure. Taking into consideration exogenous factors that are associated with these solutions is a crucial question to assess their possible effects. This study examines the possible explanatory factors and their evolution until the year 2054 of several solutions in the Île-de-France region: wastewater heat-recovery, surface geothermal energy, and heat-mitigation capacities of zones. This investigation is performed by a series of statistical models, namely the ordinary least squares (OLS) and the geographically weighted regressions (GWR), integrated within a geographic information system. The main driving factors were identified as land use/land cover and population distribution. The results show that GWR models capture a large part of spatial autocorrelation. Apropos of prediction results, areas with low, medium, and high potential for implementing specific solutions are determined. Furthermore, the implementation capacities of solutions are compared with the demand depicted as the need for slowing down the effects of surface urban heat islands and the dependence on fossil energy. Moreover, the heat mitigation capacities are not at all times distinctively linked to human activities. Further investigations are needed to discover the remaining possible reasons, particularly air quality, water, vegetation, and climate change.

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City-wide model-based analysis of heat recovery from wastewater using an uncertainty-based approach

Cited by 9 publications

References 28 publications

How to get your feet wet: Integrating urban water and building engineering for low-energy domestic hot water systems

How to get your feet wet: Integrating urban water and building engineering for low-energy domestic hot water systems

Determination of the optimal heat exchanger configuration for wastewater heat recovery

Geographically Weighted Regression-Based Predictions of Water–Soil–Energy Nexus Solutions in Île-de-France

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