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22 julio 2015 3 22 /07 /julio /2015 20:43
A new neighborhood in Tieshan (Huangshi Prefecture-Level City, Hubei). Typically for Hubei, the buildings are equipped with solar water heaters.
A new neighborhood in Tieshan (Huangshi Prefecture-Level City, Hubei). Typically for Hubei, the buildings are equipped with solar water heaters.
China will develop a network of micro energy from renewable sources
China presenta directrices para micro red energética de nuevas fuentes

BEIJING, 22 jul (Xinhua) -- China va a desarrollar una micro red de energía de fuentes renovables para fomentar aún más el desarrollo sostenible de los recursos energéticos, anunció hoy miércoles la Administración Nacional de Energía.

La micro-energía, lo contrario de las grandes centrales eléctricas, hace referencia a pequeñas fuentes de energía generables en masa, fáciles de implementar, competitivas en costo y rápidamente expansibles.

La micro red de energía constituye un enfoque innovador para el ahorro de energía y la reducción de emisiones, según las directrices publicadas por la Administración Nacional de Energía que enumeran los requisitos específicos para la gestión tecnológica y operativa de la micro-energía.

La micro red de energía de nuevas fuentes debe hacer uso de una combinación de diversas fuentes renovables como la energía eólica y solar, el gas natural y las fuentes geotérmicas.

Las directrices tienen presente las últimas novedades en investigación sobre tecnología y aplicación de la micro red de energía de nuevas fuentes, lo cual les ha otorgado la capacidad de poner en marcha proyectos de prueba.

La generación de micro-energía libera poco carbono y permite a todo tipo de colectivos, y también a individuos, producir energía, lo que podría fomentar la competencia en la industria de generación eléctrica.

RELACIONADO: 

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Smart Micro Energy Network (SMEN)

Using SMEN, two goals can be achieved: first, to improve the energy efficiency of high-grade fossil energy with cascade utilization; second, to improve the utilization ratio of low-grade renewable energy (or renewable heat). In the progress of rapid urbanization in China, the SMEN will have a good development prospects.

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Concepts of the Smart Micro Energy Network (SMEN)

There are three levels of SMEN:

(1)  Core layer: the on-site power generation system, such as photovoltaic, small wind turbine, fuel cells, natural gas or biomass gas fired small micro-CHP systems (combined heating & power), as the core of SMEN.

(2)  Framework layer: distributed heat pumps, energy bus integrating a variety of low-grade heat source / heat sink, and thermal storage facilities as the framework of SMEN. The heat pump is an important link between Core layer and demand-side client users.

(3)  Management layer: using the information and communication technologies, such as internet technology, internet of things, and cloud technology, to support interactive community energy management systems. This kind of energy management essentially is a service.

The most important feature of on-site power generation by renewables and clean energy is its instability, especially the mismatch between supply (generation) and demand (load) and the inconsistency of the time and the power. There is another mismatch for cogeneration systems, namely heat and electricity. For building energy use in urban area, it is never to spent electricity and heat synchronously. According to the current technologies, large-scale electricity storage has not been used in commercial operation. But all cogeneration equipment has a certain heat-to-electric ratio range, if the electricity from cogeneration has neither been use up nor connected to grid, the system will shut down, and therefore to affect heat production.

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The main objective of energy planning in green eco-communities is to achieve maximum urban energy efficiency, and to use clean energy, renewable energy sources and end-use energy-saving to alternate the fossil fuel energy. This paper introduced the concept of micro energy network, and presents a comprehensive analysis of the architecture and configuration for the core layer, the framework layer and the management layer, respectively. The paper introduced the new technology concepts such as smart grid, smart-grid ready heat pump, distributed heat pump systems, energy bus, and the ubiquitous control network protocol. Under existing conditions, the micro energy network technology is completely achievable and landing-available.

In 2012, China's urbanization rate has reached 52.6%. At the next two or three decades, China's urbanization will be a critical period. The speed and scale of China's urbanization is unprecedented in the history of mankind. Almost all new development zones or industrial parks have developed a low-carbon eco-development planning. The special plan for energy is an important component of low-carbon eco-development planning. Differing from past supply-side energy planning for electricity, gas and heat supply network, this special energy planning is a demand-side planning, its main function is:

·  Setting strategic energy efficiency goals and key performance indicators for the community.

·  Integrated application of renewable energy and low-grade renewable heat.

·  Take the client's energy-saving as a virtual carbon-free alternative energy resources.

·  Efficient use of low-carbon natural gas fired distributed energy cogeneration.

·  Achieving cascade utilization and heat recovery of fossil energy resources.

·  Diversifying investments of community energy system, marketizing energy management, promoting the Clean Development Mechanism (CDM).

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References

1. European Heat Pump Association, Smart cities and aspects of heat pump integration, European Heat Pump News, No.2, June 2011, www.ehpa.org/uploads/media/2011-2_ehpa_newsletter_final.pdf.

2. LONG Weiding, More understanding about the principal of “determining power by heating load” in heat and power cogeneration (in Chinese), HV&AC, Vol. 41, No.2, 2011.

3. International Energy Agency (IEA), Technology Roadmap: Smart Grids - Chinese version, www.iea.org, 2011.

4. WANG Peipei, LONG Weiding, BAI Wei, Study on Energy Bus System: Semi-central DHC (in Chinese), Journal of Hunan University(Natural Sciences), Vol. 36, No. 12, Dec. 2009.

5. FAN Ying & LONG Weiding, Exergy and carbon dioxide emissions analysis of energy bus system (in Chinese), HV&AC, Vol.43, No.1, 2013.

 

 

Smart Micro Energy Network for Eco-Communities: REHVA

www.rehva.eu/...resources/.../smart-micro-energy-ne...

 

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