Domestic hot water technology transition for solar thermal systems: An assessment for the urban areas of Maputo city, Mozambique

Artur, Célia; Neves, Diana; Cuamba, Boaventura; Leão, António José

doi:10.1016/j.jclepro.2020.121043

Cited by 15 publications

(12 citation statements)

References 18 publications

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“…Behavioural belief (acceptance) of energy users comprises perception, knowledge and ownership status. To understand energy users' behavioural beliefs, it is important to understand energy users' motivation [18][19][20][21]. First, energy users want to be free to decide what needs to be done in their homes [22].…”

Section: Literature Review: Energy Users' Social Drivers To Transitio...mentioning

confidence: 99%

Energy users’ social drivers to transition from natural gas: a Dutch municipality case study

Hajarini

Diran

Chappin

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Dutch municipalities have a vital role in creating policy concerning natural gas replacement with sustainable sources in the built environment by 2050, i.e., the so-called heat transition. Over the years, information provision from research and consultants to municipal policymaking in the heat transition has covered mainly the techno-economic dimension. However, a gap remains in the social information provision which enables more comprehensive and inclusive decision-making. This study answers the following research question: What social aspects do municipal policymakers need to consider in municipal heat transition policymaking? We first conducted a systematic literature review concerning energy users’ social drivers to transition from natural gas. Second, we conducted a single case study on the policymaking process of heat transition projects in the municipality of Zoetermeer in the Netherlands. The case study involved heat transition actors with various roles in municipal decision-making, including municipal policymakers, researchers, corporations and citizens. Then we developed a framework of the social drivers of energy users to transition from natural gas. Finally, this framework was enriched in an ex-ante evaluation in a semi-structured workshop. Our study shows that energy users’ social drivers can be categorized as behavioural belief, normative belief, and control belief. These social drivers combined with the techno-economic aspects shape the energy users’ participation in the heat transformation.

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Section: Literature Review: Energy Users' Social Drivers To Transitio...mentioning

confidence: 99%

Energy users’ social drivers to transition from natural gas: a Dutch municipality case study

Hajarini

Diran

Chappin

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…The implementation of solar thermal systems has been studied in different regions, with different climatic conditions and in countries whose economic considerations for their application are very different. Artur et al [25] applied a survey to understand the transition of current domestic hot water technology to solar thermal systems in urban areas (Maputo, Mozambique). The study demonstrated a positive outcome regarding the reduction of electricity demand and the consequent economic savings.…”

Section: Brief Literature Reviewmentioning

confidence: 99%

“…Part of the energy is reflected, and part of it is lost through conduction-convection [44,45]. As the collector absorbs heat, the temperature inside the collector rises, but some heat is lost by convection and radiation to the surroundings [25]. The heat loss (Q o ) depends on the collector overall heat transfer coefficient (U L ) and the temperature difference between the collector temperature (T c ) and the ambient temperature (T a ), as shown in Equation (3).…”

Section: Solar Thermal System Description and Physical Modelmentioning

confidence: 99%

Multi-Objective Optimization of Solar Thermal Systems Applied to Portuguese Dwellings

et al. 2020

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Solar thermal systems have been widely used to increase energy efficiency in the building sector, since the use of renewable energy sources became one of the top priorities to meet environmental targets. The main objective of this study is the thermo-economic optimization of solar thermal systems for residential building applications, considering a multi-objective approach. The simulations were performed through a MatLab code by implementing an elitist variant of Non-dominated Sorting Genetic Algorithm-II (NASGA-II). The solar collection area and the linear loss coefficient as well as the tank storage volume were defined as decision variables. A two-dimensional Pareto front was obtained, considering as objective functions the minimization of the annualized investment cost and the maximization of the solar collection efficiency. Based on the best trade-off between both objectives and considering that the solar thermal systems can operate for a period of at least 15 years, the Pareto analysis led to the conclusion that a system with an annualized investment cost between 270 and 280 €/year allows reaching a collection efficiency of 60%. After the analysis of the optimal solution points, a configuration was selected to estimate the system total purchasing cost: a panel with a solar area of 4.17 m2 and with a linear coefficient loss of 3.684 W/m2.K; a storage volume of 0.275 m3; and a pump flow rate of 0.1364 m3/h. For this configuration, we estimated a total purchasing cost of 2545.0 €, whereas the solar collector and the storage tank are the most expensive components, representing a share of 42% and 43%, respectively. These results represent a specific cost of 610.3 €/m2 per solar collection area.

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“…Moreover, the extensive use of renewable energy sources could strongly influence the load curve of the community, as demonstrated by Ilkan et al [22] for the island of Northern Cyprus where the use of solar thermal water heater was intensely encouraged by the local government, leading to a maximum yearly saving about 72 GWh [23]. Indeed, solar thermal technologies can be a very good solution to decrease the electricity demand by domestic hot water [24], because a great amount of energy consumption also takes place during the operational period, in order to satisfy the demand of domestic hot water (DHW) [25]. Moreover, the use of active and smart systems at the building level, enabling the possibility of implementing demand-side management (DSM) policies, could be easily applied in a typical building on Lampedusa Island (Italy), controlling the effect of flexible electrical loads on the load curve of the island.…”

Section: Introductionmentioning

confidence: 99%

Solar and Heat Pump Systems for Domestic Hot Water Production on a Small Island: The Case Study of Lampedusa

et al. 2020

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The achievement of United Nations Sustainable Development Goals, related to energy and resource use, is a critical issue for small and insulated communities. In many minor islands, solar energy is not correctly exploited, and electrical heaters are connected to weak grids with very a high share of generation by fossil fuels. As a consequence, there is the necessity to assess the potential and the suitability of diffusion of alternative systems to avoid dependency on the electrical grid and reduce carbon emissions. This paper aims to evaluate the technical and economic performances of some alternative systems exploiting renewable energy for domestic hot water production. Four different systems were simulated and studied: a heat pump connected to the grid, a heat pump coupled with a photovoltaic plant, a heat pump combined with a solar thermal collector, and a solar thermal plant. Moreover, heat and electricity storages were studied for reducing impacts on the distribution network. The work presents data gathered for a study on energy-retrofit strategies on Lampedusa Island (Italy, 35°30′56″ north (N), 568 degree-days). Finally, to select the most cost-effective plant, an economic analysis of the chosen systems was carried out. This analysis shows that the best net present values are associated with the heat pump (HP) coupled with a stand-alone PV system and a small battery and solar thermal-assisted HP. The shortest payback time was calculated for the solar thermal system.

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Domestic hot water technology transition for solar thermal systems: An assessment for the urban areas of Maputo city, Mozambique

Cited by 15 publications

References 18 publications

Energy users’ social drivers to transition from natural gas: a Dutch municipality case study

Energy users’ social drivers to transition from natural gas: a Dutch municipality case study

Multi-Objective Optimization of Solar Thermal Systems Applied to Portuguese Dwellings

Solar and Heat Pump Systems for Domestic Hot Water Production on a Small Island: The Case Study of Lampedusa

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