A cross-country perspective on solar energy in urban planning: Lessons learned from international case studies

Lobaccaro, Gabriele; Croce, Silvia; Lindkvist, Carmel; Probst, Maria Cristina Munari; Scognamiglio, Alessandra; Johan, Dahlberg; Lundgren, Marja; Wall, Maria

doi:10.1016/j.rser.2019.03.041

Cited by 97 publications

(61 citation statements)

References 54 publications

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“…Additional building types, locations and climates, as well as energy-related technologies, could also be considered in future research based on the model proposed in this research. This could lead to better insights regarding the way in which buildings with different energy consumption profiles and requirements should be connected within a single "energy community" [34], and how local PV electricity and thermal energy production and sharing can be optimally combined in such communities [35]. It is our hope that this paper will contribute to extending and enriching these ongoing discussions by ensuring that the cost-related aspects of NZE communities are included in future research.…”

Section: Discussionmentioning

confidence: 93%

Cost-Optimal Net Zero Energy Communities

2020

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The objective of this research is to study the cost of Net Zero Energy (NZE) communities of different urban scales and densities, while taking into consideration the local climate and the type of buildings in the community. A comprehensive model was developed for this purpose, with which the cost-optimal configuration of renewable energy-related technologies for an NZE community can be identified. To validate the model, data from two case studies that differed in their climate and building types were used. The results of this study contribute to a better understanding of the implications of NZE requirements for urban planning. An increase in the scale of a community was found to reduce energy costs, up to a certain point. Urban density, on the other hand, was found to have a more complex impact on costs, which depends on the local climate of the community and the subsequent energy demand. This underlines the importance of addressing the technological design of energy systems at the initial stage of the urban planning of energy-efficient communities, before the urban density, the unbuilt areas and the building types are set.

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Section: Discussionmentioning

confidence: 93%

Cost-Optimal Net Zero Energy Communities

2020

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“…In order to define pressure and velocity distribution at the entrance and outlet of the absorber, the zero gradient model [26], given by Eq. (2) has been applied to these boundaries. Further consideration has been given to the selection of radiation modelsince the radiation is the only way of energy propagation outside the external absorber' surface and might vitally contribute to the heat transfer at the absorber-fluid internal interface, high accuracy of modelling was strongly required.…”

Section: Computational Modelmentioning

confidence: 99%

“…Although fossil fuels remain fundamental for worldwide energy sector, their continuous depletion lead to the widespread introduction to the global power and heat sector of power technologies based on renewable energy sources (RES) in last decades [1]. Due to their high seasonal and day-by-day instability of operation, the RES-based technologies were widely introduced to the distributed energy sector [2]. Among all primary energy sources, the solar energy shares an essential part within the distributed RES-based units [1].…”

Section: Introductionmentioning

confidence: 99%

Modeling of influence of vibration on intensification of heat transfer within the absorber of the vacuum solar collector

et al. 2019

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Due to escalating role of mitigation of climate change in power and energy sector, power units based on renewable energy sources (RES) became vital part of global power and heat market, including distributed heat generation as well. Significant number of such installations belong to individual users, commonly using solar collectors to prepare domestic hot water directly at their sites. However, the vitally variable solar irradiance makes the solar energy difficult in efficient harvesting considering long time period. Thus, maximization of power gain from single solar absorber, when the solar radiation flux is temporarily high, might lead to further rise in overall, year-averaged efficiency of such units. The paper concerns modelling of intensification of heat transfer, taking place within the absorber of a vacuum solar collector, due to insertion of vibrating element inside the thermal oil canal, compared to static turbulization method. Different geometries of vibrating elements and amplitudes of oscillatory motion, as well as heat carriers, are investigated using commercially available CFD software. Results indicate rise in solar power acquired within the absorber using vibrating elements, with essential difference between circulating media, and suggest vital benefits from utilization of static turbulizing devices.

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“…In recent years, the demand for renewable and sustainable energy has reached a peak due to the depletion of fossil fuel resources and increasing environmental problems. Various renewable sources such as wind [1][2][3], wave [4][5][6], hydrogen [7][8][9], and solar [10][11][12] energies have been intensively investigated and commercialized. Among these, solar energy is one of the most important sources to harness energy for future applications.…”

Section: Introductionmentioning

confidence: 99%

Grid-Connected Photovoltaic Systems with Single-Axis Sun Tracker: Case Study for Central Vietnam

Cuong

Nguyen

et al. 2020

Energies

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Recently, the demand for small grid-connected photovoltaic (PV) systems has been rapidly increasing; this is due to the reduction in the costs of grid-connected storage systems as compared to those of the stand-alone ones. Notably, the performance of the solar tracking system is not only depending on the types but also the region that they are set up and used. To understand how solar tracking systems work globally, we need to know their performance in each country and even the different parts of a country. In this study, two grid-connected PV systems with 250 W solar modules were used to investigate the efficient improvement of a single-axis sun tracking system in Central Vietnam. First, a mechanical tracking device with a linear actuator and a controller was designed and then its performance was comprehensively investigated with a grid-connected PV system. In addition to evaluating the energy gain by the tracking system, this study also considered the energy consumption of the linear actuator with its controller and a small grid-connected PV system; this has generally been omitted in previous works. Experimental results indicate that the total energy consumption of the tracking system was approximately 2–8% of the energy generated by the grid-connected PV system. The maximum overall energy generation was confirmed to have increased by up to 30.3% on a sunny day upon using the proposed tracking system; further, the net energy gain by using the sun tracker was ascertained to be 15.2% in average weather conditions. Based on the success of this work, we will keep experimenting with other parts of Vietnam. Also, we will collaborate with colleagues in other countries to create a guideline for understanding and using the solar tracker regionally and globally.

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A cross-country perspective on solar energy in urban planning: Lessons learned from international case studies

Cited by 97 publications

References 54 publications

Cost-Optimal Net Zero Energy Communities

Cost-Optimal Net Zero Energy Communities

Modeling of influence of vibration on intensification of heat transfer within the absorber of the vacuum solar collector

Grid-Connected Photovoltaic Systems with Single-Axis Sun Tracker: Case Study for Central Vietnam

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