As renewable energy sources become part of the mainstream, we see some challenges to more widespread adoption. For solar energy, two of those hurdles are the shortage of experienced system designers, and the cost of installation.
To resolve these issues, Toshiba is using ICT (Information and Communications Technology) and testing the implementation of next-generation materials, such as organic thin-film solar cells.
Developing an Integrated Platform for PV System Design
Solar panels are often installed facing south, because it is assumed that this placement will increase their efficiency. However, this is not always the case. For example, when a property has a rectangular shape that goes from Northeast to Southwest, then it’s not possible to install the panels facing directly south.
In order to achieve the highest efficiency for solar power generation, a detailed analysis is necessary for each location. Factors such as land formation, space, and the particular characteristics of the local environment can affect energy output. It helps to have experienced designers who have accumulated knowledge from past experience and application.
At Toshiba, we have used information technology to develop a system called the PV Engineering Platform, or PVEPF. This system is designed to collect and analyze many variables including location, local weather conditions such as the annual amount of sunshine and temperature range, conversion efficiency, hardware and software specifications, and running costs. Based on these factors and more, we can calculate the optimal design to achieve the maximum amount of solar output at the lowest cost. Our testing so far has already resulted in improvements to design accuracy, while complementing the experience and knowledge of the designers.
Below are the main functions of our PVEPF system.
(1) Placement of Solar Panels / Automatic Wiring Engine
The placement of the panels must first reflect the needs of the people who live or work at that location. For example with a home installation, do your customers want to minimize the tilt of the solar panels to improve power generation? Or would they prefer to set up more solar panels on the premises to improve power output?
(2) Solar Array Placement Function
Additional factors need to be based on customer preference. For example, if customers want to prevent their solar panels from being in the shade during certain hours in winter, we need to strategize the placement of the panels accordingly.
(3) Wiring Functions
The PV system’s voltage value and current value is decided by the Power Conditioner (PCS) rating. Wiring functions maintain the balance of the solar array capacity. After checking locational information, the system calculates the length of the direct current cable route connecting the solar array and the PCS.
(4) Wind Pressure Load Analyzing Engine
For safe and stable operation of the solar array, panels must be resistant to wind pressure. The structural design is critical to resolving this issue. Our database includes information that evaluates numerous factors for solar array placement patterns and wind pressure loads. The wind analysis database is used when constructing solar panels, connecting wires, and by making a detailed analysis of the mount and foundation strength.
(5) Solar Radiation / Reflective Light Analyzing Engine
Through simulations of the sun’s movement over a year, we can produce high level calculations of the solar radiation volume and reflective light.
By simulating the sun’s movement over a full year, we can produce high level calculations of solar radiation volume and reflective light.
Next-Generation Material: Organic Thin-Film Solar Cells
In addition to maximizing the electric power generation of solar and reducing costs with our flexible designs, it is necessary to reduce the initial costs of construction. Organic thin-film solar cells are made with printing and coating technologies, and are being studied as the next generation of solar battery material to save costs. Because the material is so lightweight and flexible, it could enable mega-solar installations, for example to cover an entire building.
At Toshiba, we support the mainstream adoption of renewable energy in many forms. We are working on system designs to speed the process while making these solutions more robust, cost-effective, and safe. We are committed to lending our technology, pursuing new ideas, and supporting the development of renewable energy on a global scale.
