Energy consumption in buildings represents more 40 % of total energy use in EU and USA. Most of this energy is for the provision of lighting, heating, cooling, and air conditioning. The green and sustainable development movement in the world has placed green building in high priority as it is able to meet the building demand while mitigating the negative impacts of construction sector. High energy performance level in building can be attained by taking advantage of passive design techniques and active solar technologies such as solar collectors for hot water and space heating, photovoltaic (PV) panels for generating electricity. Green building standards are guidelines to enhance the environmental performance of buildings from its design stage, through to construction, and operation. Solar design and energy use are integral to this process. Active systems can provide additions to the supply, but passive design is the first step to making a structure energy efficient from the very beginning. Generating electricity with PV systems is an active solution. It converts sunlight directly into electricity which feeds into the existing electrical system of buildings, and it does this without creating any air pollution or greenhouse gases. Energy consumption in Vietnam’s building sector is growing quickly as a result of rapid industrialization and urbanization. Some reports shown that, the building sector is one of the main energy consumers in Vietnam, accounting for 33% share in 2012 and 35.6% in 2014, which will continue to increase in the future due to the pressure of increasing demand for buildings. Achieving green building and so far nearly zero-energy buildings has becoming an important part of sustainable development and attracts the attention of scientists in Vietnam. However, the adoption of green building is still limited, the release of related regulations are slow and governmental support are lacking. It is recommended that the Vietnamese government should take stronger actions such as ratifying regulations or offering incentives to promote green building for sustainable development. On the other hand, the low voltage power grids (220/380V), which consist of low voltage distribution grid andpower supply grids in industrial and building sector, is uneven quality, is non-compliant with technical standards, and has high losses. It is actually not easy to apply common smart-grid standard in operation, but it is necessary to give priority to address scientific research on smart grid technologies at local level, that known as “micro smart grid”, in order to eventually improve the current national power grid and effectively operate the electricity system. Micro grid is an important part of the development of smart grid. The micro grid is characterized as the “building block of smart grid”. With the integration of renewable energy sources into grid, electrical storage, flexible loads and energy management solutions, they could be considered “smart” at a local level of a “micro grid” inside the overall “Smart Grid”. In this MSGBEM project, we focuses our research on the “micro smart grid” development at the building level. The power supply system for platform is from a Photovoltaic generation, an electrical storage (battery bank of 15 kWh) and power grid (220/400 V). The PV system at power scale of 15 kWp including an inverter and solar panels will be installed on the rooftop of USTH building. This system extracts the maximum power obtainable from the PV array under different working conditions to provide a portion of the building power demand. In fact, storage can “smooth” the delivery of power generated from solar technologies, in effect, increasing the power of PV sources. The load includes lighting systems, ventilation and air-conditioning systems, and elevator. Besides, the monitoring system allows collecting data that can be analyzed providing information for the optimal operation. The energy controller reads all the data measured by the transducers for managing and running the equipment following the different selected modes. The energy manager controls the delivery of energy, the run of charges and discharges batteries. The main objectives of this project are to benefit from photovoltaic power supply, to improve energy efficiency and to reduce cost of electrical consumption in different scenarios.
PI : Assoc. Prof. Benoit DELINCHANT, G2Elab, University Grenoble Alpes
Co-PI : NGUYEN Xuan Truong, USTH
DOAN Nhat Quang, USTH
NGUYEN Dinh Quang, IES-VAST
DANG Hoang Anh, Center for R&D and T T
Frédéric WURTZ, CNRS