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  • Different Types of Inverter Cooling Technology 2017-07-21
    Different Types of Inverter Cooling Technology

    With the increase in photovoltaic inverter power, the thermal design requirements are getting higher and higher. The designer must take into account the heat dissipation, protective, installability, maintainability, and economic costs of the inverter cooling system.Inverter cooling technology includes natural cooling, forced air cooling, liquid cooling, relative cooling and so on. 1. Natural cooling The natural cooling relies on the temperature rise to produce the buoyant force to drive the air for convective heat dissipation. Advantages are low maintenance requirements, high degree of protection. The disadvantage is that it will be affected by the radiator, bulky, heavy weight. 2. Forced air cooling Forced air cooling through the fan-driven air flow. Advantages are small size, light weight. The disadvantage is the addition of moving parts to the fan. 3. Liquid cooling The liquid cools through the pump to circulate the coolant in the heat sink. Advantages are good heat dissipation, low temperature. The disadvantage lies in the complexity of the system structure, poor economy, there is the risk of leakage. 4. Relative cooling Relative cooling depends on the evaporation of latent heat in the liquid medium. Advantages is high thermal efficiency. The disadvantage is that the media loop sealing requirements are high, the process is complex and the economy is poor. Studies have shown that forced air cooling efficiency is 10 to 20 times the natural cooling, more efficient cooling methods are liquid cooling. From the structural complexity and the difficulty of the realization of view, forced air cooling system than the liquid cooling system is simple, easy to achieve, high reliability. Thus, in the power industry, it’s preferred forced air cooling mode, followed by natural cooling, liquid cooling and other cooling methods. Normally, the electronic components allow the operating temperature rise in the range of 40 to 60 ° C. Use forced air cooling, comprehensive performance and higher cost. When the heat flux continues to increase, you need to choose other cooling methods such as liquid cooling. For the power of several MW in a large wind energy converter, cooling methods are selected liquid cooling; power between 100KW to 1MW of centralized photovoltaic inverter, cooling mode for forced air cooling; and power from a few kilowatts to several 10 kilowatts of string-string photovoltaic inverter, according to stand-alone power from small to large, thermal design from natural cooling to forced air cooling. The theoretical analysis into the actual product in the cooling program on the comparison of choice, scientific guidance group string PV inverter in the product design of the cooling program applications. When the power is less than 20kW, the use of natural cooling can achieve the product size, weight and overall performance of the optimal match; when the power is greater than 25kW, the heat flow density is large, forced air cooling is more economical and e...

  • Development and Forecast of PV Market 2017-07-17
    Development and Forecast of PV Market

    2016 is a milestone in the growth of global PV installed capacity. According to the latest statistics released by the German Solar Energy Association, 2016 global PV installed capacity of 70GW, compared with 2015 growth of about 30%, thus, the global PV installed capacity of 300GW. In the new installed capacity in 2016, China contributed 34.54GW, compared with the new installed capacity in 2015, an increase of 128%, the cumulative installed capacity of 77.42GW, new and cumulative installed capacity are the world's first. The United States 2016 annual installed capacity of 14.76GW PV, installed capacity increased by 97%, of which the public operating capacity has played a major role in pulling. Japan is still the largest market forChina's PV module exports, but in 2016,China's exports of PV modules amounted to US $ 2.834 billion, down by 26.80% from 2015.Japan's solar market is expected to show a recession trend, in July 2016 by the Chinese market rolled up the global component of the decline in value of the Japanese solar energy plant even worse. Panasonic, Kyocera, Sharp Solar business due to weak market conditions and the downward trend, the Group's performance has been dragged down. Since 2014,JapanisChina's largest PV module export market, the Chinese brand has occupied the Japanese market share of more than 40% to 2016 has reached 46%. We initially predicted that the Japanese installed market in 2017 will appear more substantial decline in the annual installed capacity may be between 8-9GW. Affected by this,China's PV exports toJapanwill face a more complex situation, the short term exports toJapanmay continue to decline. In 2016, theUSmarket accounted for 11% ofChina's total exports of components, the export value fell 20.33% to 1.427 billionUSdollars.Prospect 2017, by Trump related to the policy of the impact ofChina's exports of photovoltaic products to theUnited Statesthere are still large variables. Trump's energy policy is aimed at fueling petrochemicals and plans to revoke the climate agreement signed by former President Barack Obama at theParissummit, and even support overweight trade barriers to stop trade liberalization, the energy industry is rapidly frozen. At present, we remain cautious about theUSmarket, it is expected to basically maintain a slight concussion in 2017, but does not rule out the sudden impact of policy factors, also suggested that the parties to keep relevant dynamic tracking. India in 2016 becameChina's PV module exports the second largest market, in 2016,China's exports of photovoltaic components inIndia2.459 billionUSdollars, an increase of 78.68% over 2015. WhileChina's PV module has risen sharply onIndia's exports, the dependence of Indian PV industry on Chinese products is also rising. According to the statistics of India's Ministry of Commerce, during the period from April to October, Products have accounted for 87% of the market, followed by Malaysia, but accounting for only 7%, ranked third in Taiwan, a...

  • How to integrate the integration of photovoltaic building 2017-07-14
    How to integrate the integration of photovoltaic building

    Photovoltaic building, has become a contemporary architectural beauty, but in the actual design of building integrated photovoltaic installation process, need to consider many factors and requirements, if we do not pay attention to or ignored, will not achieve the desired effect.   What factors and requirements should be taken into account in the design of photovoltaic building integration system First, the requirements of photovoltaic array layout.  We all know that building construction and installation of photovoltaic power generation, not in order to highlight the personality, more than fashion, in most cases the user is to photovoltaic power generation and create more revenue, so the photovoltaic building in the design of the time to maximize profits from the angle of design and installation. For a specific location of the building, with the integration or integration of photovoltaic panels on the roof and walls, the solar radiation can receive a certain.   In order to obtain more solar energy, photovoltaic array arrangement as far as possible toward the sun light incidence direction, such as can be installed on the roof of the south, Southeast and southwest, if the area is limited, can be installed in the East and West direction. It is worth mentioning that taking into account the surrounding environment of the building, as far as possible to avoid or away from the shelter. As we all know that the PV array occlusion for photovoltaic system is fatal, occlusion is not only affected by the power generation capacity of the plant, revenue, but also affect the life of the power plant.   Three, the number of components and the arrangement of the requirements.  According to the size of the component area, the number and arrangement of the components that can be installed in each roof can be determined. Due to the different orientation of each roof, a roof generally requires one or several inverters, the design of a group of series inverter structure, in order to improve the efficiency of the inverter.  When the user understand the content, the system design and installation time and pay attention to, so the design of the building can not only exist in the sense of beauty, but also to ensure that the user's income.  

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Anhui JNGE POWER Co.,LTD is a high-tech enterprise with more than 10 years experience, specializing in solar, wind  and other renewable energy power products. Our main products are pure sine wave inverter, pure sine wave DC-AC  hybrid inverter and controller all in one,solar charge controller, wind-solar hybrid controller, MP...

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