Field measurement and numerical simulation of combined solar heating operation modes for domestic buildings based on the Qinghai–Tibetan plateau case

Liu, Zhijian; Wu, Di; Yu, Hao; Ma, Weiqiang; Jin, Guangqiu

doi:10.1016/j.enbuild.2018.03.016

Cited by 86 publications

(32 citation statements)

References 43 publications

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“…However, almost all the main stream grey models are essentially linear models. Actually, early in 2002, Deng [26] has pointed out in his Chinese book five that nonlinearity widely existed in the real-world applications, so the linear grey models are not sufficient for more general cases, such as the processes of the underground fluid flow [27,28], the management of the unconventional petroleum reservoirs [29], heating effect of the buildings in plateaus [30], etc. In Deng's main idea, it was implied that the nonlinear grey models should be developed on nonlinear differential equations [26], thus he firstly introduced the Bernoulli equation, but leaving no discussions on the computational details.…”

Section: Introductionmentioning

confidence: 99%

The conformable fractional grey system model

et al. 2020

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The fractional order grey models (FGM) have appealed considerable interest of research in recent years due to its higher effectiveness and flexibility than the conventional grey models and other prediction models. However, the definitions of the fractional order accumulation (FOA) and difference (FOD) is computationally complex, which leads to difficulties for the theoretical analysis and applications. In this paper, the new definition of the FOA are proposed based on the definitions of Conformable Fractional Derivative, which is called the Conformable Fractional Accumulation (CFA), along with its inverse operation, the Conformable Fractional Difference (CFD). Then the new Conformable Fractional Grey Model (CFGM) based on CFA and CFD is introduced with detailed modelling procedures. The feasibility and simplicity and the CFGM are shown in the numerical example. And the at last the comprehensive real-world case studies of natural gas production forecasting in 11 countries are presented, and results show that the CFGM is much more effective than the existing FGM model in the 165 subcases.

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Section: Introductionmentioning

confidence: 99%

The conformable fractional grey system model

et al. 2020

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“…Many countries have realized the importance of renewable energy development and utilization in reducing the dependence on fossil energy and mitigating climate change (Liu et al, 2018). China has made substantial efforts in promoting the development and utilization of renewable energy.…”

Section: Introductionmentioning

confidence: 99%

Effect of heat extraction on the thermal efficiency of salt gradient solar pond

Wang

Xie

et al. 2018

Energy Exploration & Exploitation

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In this paper, the experiment simulates the salt gradient solar pond with heat extraction and that without heat extraction, setting temperature sensors in the solar pond to monitor the temperature change of each measuring point in real time, extracting heat in the low convective zone and nonconvective zone at the same time. The experimental results show that heat extraction can improve the heat storage capacity of solar pond. The heat storage of solar pond with heat extraction is 40.3% more than that without heat extraction according to the experimental results. The heat extraction can increase the overall thermal efficiency of the solar pond; the efficiency of solar pond with heat extraction and that without heat extraction is 22.2 and 28.7%, respectively.

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“…Considering that an estimated 59% of China's population in 2017 is located in urban areas, with an annual urbanization rate of 1.2%, it is clear that most of the energy consumption in China takes place in urban areas. With energy prices increasing and CO 2 emission reduction remaining a serious problem, adopting solar energy in urban areas appears to be an essential and practicable strategy for sustainable development [1]. Solar urban planning is a complex process that must consider the interplay between solar energy and urban form.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Local Environmental, Economic and Social Variables on the Spatial Distribution of Photovoltaic Applications across China’s Urban Areas

2018

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Abstract:The capacity of new installed photovoltaic (PV) in China in 2017 was increased to 53.06 GW, reaching a total of 402.5 GW around the world. Photovoltaic applications have a significant role in the reduction of greenhouse gas emissions and alleviating electricity shortages in the sustainable development process of cities. Research on the factors that influenced the spatial distribution of photovoltaic applications mostly focus on a certain project or a region. However, it is a complicated process for decision-making of photovoltaic installations in urban areas. This study uses zip code level data from 83 cities to investigate the influence of local environmental, economic and social variables on the spatial distribution of photovoltaic applications across China's urban areas. By analyzing the current situation, the locations of urban photovoltaic applications are collected and presented. Statistical analysis software is used to evaluate the influence of selected variables. In this paper, correlation analysis, principle component analysis (PCA) and cluster analysis are generated to predict urban photovoltaic installations. The results of this research show that Gross Domestic Product (GDP), electricity consumption, policy incentives, the number of photovoltaic companies, population, age, education and rate of urbanization were important factors that influenced the adoption of urban photovoltaic systems. The results also indicate that Southeast China and Hangzhou Province are currently the most promising areas as they have a higher rate of solar photovoltaic installation. These conclusions have significancefor energy policy and planning strategies by predicting the future development of urban photovoltaic applications.

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Field measurement and numerical simulation of combined solar heating operation modes for domestic buildings based on the Qinghai–Tibetan plateau case

Cited by 86 publications

References 43 publications

The conformable fractional grey system model

The conformable fractional grey system model

Effect of heat extraction on the thermal efficiency of salt gradient solar pond

The Influence of Local Environmental, Economic and Social Variables on the Spatial Distribution of Photovoltaic Applications across China’s Urban Areas

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