Saving and using energy efficiently are being posed to many countries around the world. In Vietnam, under the condition that hydropower projects have been fully exploited and thermal power projects face the pressure of environmental pollution, the development of renewable energy sources is considered as a development direction. sustainable development of the energy sector.
New development direction of Vietnam’s energy industry According to the Vietnam Clean Energy Association, our country is one of the countries with the most sun in the world solar radiation chart. In the Central Highlands and South Central provinces, the number of sunny hours is from 2,000 to 2,600 hours / year. The average solar radiation is 150 kcal / m2, accounting for about 2,000-5,000 hours / year. Bringing high-quality solar energy into use in businesses, factories are contributing to effectively solving the problem of saving energy and preserving the environment. Compared with other natural sources, solar power has outstanding advantages. To produce 1MW of electricity only needs 1 hectare of space and can be deployed in all regions of the country, especially the use of roof-mounted panels. In addition, the cost of installation and payback period of solar power are gradually becoming more reasonable compared to the long-term benefits that this solution brings, making more and more households and especially businesses interested. investment mind.
Currently, an average of 1 kWp (kilo watt peak) is available for every 7-8m2 area with an investment of $ 1,000 – 1,300 / kWp (lower if the scale up to several MWp) for a system of high quality standards, ensuring durability of 25 – 30 years, with the entire package cost from survey, design to construction. The application of solar power can help businesses reduce from several hundred million to billions of dong each year. In offices, commercial centers, supermarkets … are the locations with medium-sized roof area, the appropriate solution is to install the grid-connected solar power system. The amount of electricity consumed during the day is often very large, especially electricity consumed for air conditioning systems. With a building roof with an area of about 400m2 – 4,000m2, about 50 – 500 kWp will be installed, equivalent to producing about 75,000 – 750,000 kWh of electricity per year. The current price of electricity during the day can be up to 4,000 VND / kWh, so the payback period is the shortest of all solar power users, ideal for businesses to invest.
As for factories and factories, the area is very large, so depending on the amount of electricity consumed, the enterprise can decide the level of investment capacity, usually from a few hundred kWp to a few MWp, providing businesses with 150,000 kWh. to several million kWh of electricity per year. Currently, because the price of electricity to the factory is a preferential production electricity price (nearly 2,000 VND / kWh during the day), the payback period increased by 1, 2 years compared to business electricity users; however, it is still within reasonable limits considering the long-term investment nature of the production and the 25-30 year life span of the solar power system.
In addition to installing the grid system to help reduce electricity costs, factories and factories can also apply solar power to the lighting system on the factory premises. In addition to not having to install underground cables as with the lamp posts using common grid power, the solar light system is also absolutely safe because of using low voltage DC, and especially still works even. when there is a power grid problem, ensure lighting and security for the factory. The trend of using solar power is still quite new in Vietnam, but with the economic and environmental benefits that this type of energy promises to open up many development opportunities for businesses.