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AbstractEnergy is the biggest crisis to humanity in the future. Nowadays, most of the energy used on earth comes from oil, gas and coal. According to the recent exploring and consuming rates, the energy will be exhausted in 50-100 years. Whether we can solve the crisis is closely related to the survival of humanity on the earth. The irradiation from the sun is the biggest energy source. Building PV power plant to utilize the energy from sun will be an only way to sustain the life cycle on the earth. However, the development of PV power plants require the huge supply of PV cell and the fabrication process may bring a quantity of pollution and waste, which is harmful to the environment. On the other hand, super large PV power plant will occupy huge land. If the land cannot be explored and used reasonably, this will not benefit the human life either. In this article, we address the discussions about the above problems and propose the initial suggestions about development trend of PV industry and the safety operation mode of super PV power plant.

AbstractUsing a low supply water temperature in heating conditions and a high water temperature during cooling can increase energy efficiency, use renewable energy sources, and provide a comfortable and healthy indoor climate. High temperature cooling and low temperature heating is achieved by reducing temperature difference in heat trans er and energy transportation process. The losses in temperature difference can be classified into three types: by heat/moisture exchange; by energy transportation through air/water circulation; by indoor terminal that releases heat/cooling to indoor condit oned space. The air handling process of HVAC system and indoor terminals are the key factor of reducing temperature differen e.Aiming at the losses in HVAC system, Annex 59, titled High Temperature Cooling & Low Temperature Heating in Buildings, is a new international cooperative work under the framework of International Energy Agency (IEA) Energy in Buildings and Communities (EBC). This paper introduc s the background, scope, objective, structure and deliverables of Annex 59. Annex 59 will try to present a new perspective and a new concept to analyze HVAC system in buildings. The goal of the Annex is to build up new concept of analyzing HVAC system from the perspective of reducing mixture loss and transfer loss and th n apply it in high temperature cooling and low temperature heating system.

Abstract The research aim is to obtain a cartographic model of an urbanized territory by means of thermal survey in an infrared range. With this cartographic model, it will be then possible to reduce the zones in the urbanized territories differing in the level of superficial heat. Further, we will be able to reduce the proof thermal anomalies and thermal structures of the localities that are related to the natural and anthropogenic systems. On the examples of the cities of Ukraine – Energodar and Nikopol, we defined the sources of caloradiances from major industrial concerns as well as from thermal and nuclear power plants. For comparison, we built the model of thermal structure of the city of Tokai and the nuclear power plant with the same name Tokai (Japan). The sources of caloradiances can be, for example, pipes of thermal power stations, ponds-coolers, corps of steel-making production, and other similar objects. If the sizes of such source are known, then we are able to get the absolute values of temperatures.

With the prosperous development of the urban metro network, the characteristics of the topological structure and node importance are changing dynamically. Most studies focus on static comparisons, and dynamic evolution research is rarely conducted. It is necessary to track the dynamic evolution mechanism of the metro network from the perspective of development. In this paper, the Shenzhen Metro Network (SZMN) topology from 2004 to 2021 was first modeled in Space L. Five kinds of node centralities in eight periods were measured. Then, the dynamic evolution characteristics of the SZMN network topology and node centralities were compared. Finally, an improved multi-attribute decision-making method (MADM) was used to evaluate the node importance, and the spatiotemporal-evolution mechanism of the node importance was discussed qualitatively and quantitatively. The results show that, with the spatiotemporal evolution of the SZMN, the nodes became more and more intensive, and the network tended to be assortative. The different kinds of node centralities changed variously over time. Moreover, the node importance of the SZMN gradually dispersed from the core area of Chegongmiao–Futian to the direction of the Airport and Shenzhen North. The node importance evolves dynamically over time, and it is closely related to the changes in the node type, surrounding nodes and whole network environment. This study reveals the dynamic evolution mechanism of the complex topology and node importance in the SZMN, which can provide scientific suggestions and decision support for the planning, construction, operation management and resilient sustainable development of the urban metro.

Noise pollution must be considered to achieve sustainable cities because current levels of exposure to environmental noise are a considerable risk to the health and quality of life of citizens. Urban features and sound levels were registered in 150 streets in the Chilean cities of Talca and Valdivia to analyze the relationship between both types of variables. Urban variables related to street location, urban land use, street geometry, road traffic control, and public and private transportation showed very significant correlations with the noise levels, and multiple regression models were developed from these variables for each city. Models using only urban variables in Valdivia and Talca explained 71% and 73%, respectively, of the variability of noise. The prediction error was similar in the different types of urban roads and did not exhibit significant differences between models developed in different cities. The urban models developed in one city could, therefore, be used in other similar cities. Considering the usefulness of these variables in urban planning, these models can be a useful tool for urban planners and decision-makers to implement action plans regarding noise pollution.

The pandemic, with its environmental and socio-economic crises, has highlighted the urgency of structural responses. Overcoming this polycrisis requires the reactivation of a community and identity dimension of places. Cultural institutions can play an important role in this process. This paper proposes a focus on the role of ecomuseums in the creation of resilient communities, able to renew themselves to respond to crises. The ecomuseum movement is strongly committed to the eco-social transition of communities and territories and offers good practices for the management of common goods, methods and tools for the recognition of local identities, joint decision-making, co-planning, the care of living cultural heritage, the integral development of the landscape and the monitoring of impacts.

The hybrid system is analyzed and optimized to produce electric energy in Non-Interconnected Zones in the Colombian Caribbean region, contributing both to the improvement in the reduction of greenhouse gas emissions and to the rational use of energy. A comparative analysis of the performance of these systems was carried using a dynamic model in real wind and solar data. The model is integrated by a Southwest Wind Power Inc. wind turbine. AIR 403, a proton exchange fuel cell (PEM), an electrolyze, a solar panel and a charge regulator based on PID controllers to manipulate oxygen and hydrogen flows in the cell. The transient responses of the cell voltage, current, and power were obtained for the demand of 200 W for changes in solar radiation and wind speed for all days of the year 2013 in the Ernesto Cortissoz airport, Puerto Bolívar, Alfonso Lopez airport and Simon Bolívar airport, by regulating the flow of hydrogen and oxygen into the fuel cell. The maximum contribution of power generation from the fuel cell was presented for the Simon Bolívar airport in November with a value of 158,358W (9.45%). A multi-objective design optimization under a Pareto front is presented for each place studied to minimize the Levelized Cost of Energy and CO2 emission, where the objective variables are the number of panel and stack in the PV system and PEM.  

{"references": ["S. Throp, \"Climate change challenges and opportunities. Special issue. CTA Spore, 2015.", "Intergovernmental Panel on Climate change (IPCC) Climate change: The Physical Science Basis (summary for policy), IPCC, and Geneva. 2007.", "A.M. Atolagbe, \"Architecture in Nigeria and the Practice for Sustainable Development: A Comparative education\" Nairobi, Kenya: ICRAF. 2002.", "D.M. Ranasingbe, Forestry Education and Global Change. A case study on the contribution of Forest study of Modern and Indigenous housing strategy. AARCHES Journal, vol. 2, no. 1, 61 - 65. 2008.", "C. U. Nwajiuba, and R.U Onyeneke, Effects of climate change on the agriculture of sub-Saharan Africa: Lessons from Southeast Rainforest zone of Nigeria. Paper presented at the 10th Global Conference on Business and Economics, St Hugh's College University Press. 2010.", "M. Yesuf, S. Difalce; T. Deressa; C. Ringler and G.Kohlin, The impact of climate and Adaptation on food Production in low income countries; Evidence from the Nile Basin, Ethiopia. International Food Policy Research Institute Discussion (IFPRI) Paper No. 00828. Environment and Production Technology Division, IFPRI, Washington D.C. 2008.", "L. Grace, Sustainable Agriculture: the basic. www.gracelinks.org 2016 Accessed on 20/09/2016.", "I.U Nwaiwu, et al., The effects of Climate Change on Agricultural Sustainability in Southeast Nigeria \u2013 Implications \tfor Food \tSecurity. Asian Journal of Agricultural Extension, Economic and Sociology, vol. 3. No 1, 23-26 2013.", "Nigerian Environmental Study and Action team (NEST). Triggering Rural-Urban Interactions to Cope with Climate\t Change: An adaptation Experiment in Aba and its Region, southeastern Nigeria, NEST, Ibadan, Nigeria, 2012.\n[10]\tR. Mendelsohn, Measuring the effect of climate change on Developing country Agriculture: Two Essays on climate change on Agriculture FAO Corporate DocumentRepository, www.fao.org/docrep 2000. Accessed on 16/08/2016.\n[11]\tW. Akpalu, R.M. Hassan and C.Ringler. Climate Variability and Maize Yeild in South Africa:Results from GME (generalized maximum entropy) and MELE (maximum entropy leuven estimator) methods. International Food Policy Research Institute (IFPRI) Discussion Paper No. 00843, Environment and Production Technology Division, IFPRI, Washinton D.C.\n[12]\tR.U.Onyeneke, Climate change and Crop farmers Adaptation measures in the Southeast Rainforest zone of Nigeria (unpublished) MSC Thesis. 2010.\n[13]\tS. Anderson, Climate change impacts on the progress towards and the sustainability of MDG achievement across Africa\". Report to the Africa Partnerships Forum, 2010.\n[14]\tJ.O. Munonye and C.S. Nwosu, Agricultural sustainability and\tEnvironmental Quality. Conference on International Journal of Arts and Sciences, 08(04): 57 -65. 2015.\n[15]\tB, Ronald, Farm Productive Practices http://www.farm.org/features/002/roland-bunch Accessed on 17/06/2016."]} Climate change has both negative and positive effects in agricultural production. For agriculture to be sustainable in adverse climate change condition, some natural measures are needed. The issue is to produce more food with available natural resources and reduce the contribution of agriculture to climate change. The study reviewed climate change and sustainable agriculture in southeast Nigeria. Data from the study were from secondary sources. Ten scientific papers were consulted and data for the review were collected from three. The objectives of the paper were as follows: to review the effect of climate change on one major arable crop in southeast Nigeria (yam; Dioscorea rotundata); evident of climate change impact and methods for sustainable agricultural production in adverse weather condition. Some climatic parameter as sunshine, relative humidity and rainfall have negative relationship with yam production and significant at 10% probability. Crop production was predicted to decline by 25% per hectare by 2060 while livestock production has increased the incidence of diseases and pathogens as the major effect to agriculture. Methods for sustainable agriculture and damage of natural resources by climate change were highlighted. Agriculture needs to be transformed as climate changes to enable the sector to be sustainable. There should be a policy in place to facilitate the integration of sustainability in Nigeria agriculture.