Achmad Rofi Irsyad
In the research of P3MI 2020, it was proposed to develop a solar concentrator with a parabolic dish type. We are trying to master the solar concentrator's fundamental principles and application development. At first, the design, requirement, and objectives (DR&O) of the prototype is determined. - Objective: to concentrate the direct solar radiation in the focal point. The heat generated could be used for multi-purpose, such as: thermal energy storage, pre-heater of water/air, etc. - Limitation: diameter of 2 meters for the ease of assembly-disassembly and cost. - Feature: there is two axis tracking system so that the solar concentrator could face to the direction of the sun radiation. The prototype should be able to be developed more in the future, especially in the automation system. - Design: the detailed calculation for parabola radius, focal length, and energy harvested should be calculated by the analytical method. - Requirement: the overall solar concentrator should be easy to assemble-disassemble, so the installation should be semi-permanent. The structure of the solar concentrator should be sturdy enough to compensate the movement of the parabolic dish. The material, manufacture, and fabrication method should be the most economic for the sole purpose meet the budget. From the mentioned DR&O, the calculation to detail more on the geometry and dimension of 2-meters parabolic dish solar concentrator is performed by analytical method. Some parameter needed to be confirmed are: concentration ratio, thermal energy which concentrated, and the basic dimension.
Penerapan Teknologi Tepat Guna, Penerapa Karya Seni/Desain/Arsitektur/Perencanaan Wilayah
Indonesia's energy mix policy in 2025 will be consist of 25% renewable energy. One of the renewable energy sources that are expected comes from solar energy. The solar energy utilization in Indonesia is currently dominated by the conversion of photons in solar radiation into electricity through solar panels (photovoltaic, PV). It is consistent with the characteristics of radiation potential in Indonesia, dominated by diffuse radiation due to Indonesia's position on the equator line and its archipelagic country. On the other hand, thermal energy from solar radiation has been quite popular among the public. For example, the solar water heater, a solar absorber module installed on the roof to warm water, can be stored for household purposes. However, there is a method for extracting solar energy that has not been explored deeper in Indonesia, which is the solar concentrator. In principle, a solar concentrator is focusing solar radiation into a point or line. The solar collector's temperature will increase. The usage of solar concentrator such as organic Rankine cycle, Stirling engine, cogeneration cycle, air conditioning, endothermic chemical reactions, and water desalination are used for downstream other energy needs.