4 documents found, page 1 of 1
New functionalities for the Tonatiuh ray-tracing software
Cardoso, João P.; Mutuberria, Amaia; Marakkos, Costas; Schoettl, Peter; Osório, Tiago; Les, IñigoABSTRACT: Tonatiuh is an open source, freeware, Monte Carlo ray tracer suitable for CST applications, and is currently under further development to to increase and improve its functionalities. Work has recently been performed to implement the following functionalities: a flux distribution calculation utility; materials with incidence angle dependent optical properties; and the ability to import 3D geometries fr...
Finite dimensional models of the hydraulic hammer effect and solar tower control
Igreja, José; Marakkos, Costas; Lemos, JoãoThe occurrence of traveling shock waves associated to the sudden opening or closing of a valve, known as the hammer effect, is important from the perspective of control design because it imposes an upper bound constraint on the maximum bandwidth achievable for the controlled system. This article addresses the problem of characterizing hydraulic hammer effect of the heating fluid in a solar power tower. The tran...
New functionalities for the Tonatiuh ray-tracing software
Cardoso, João P.; Mutuberria, Amaia; Marakkos, Costas; Schoettl, Peter; Osório, Tiago; Les, IñigoABSTRACT: Tonatiuh is an open source, freeware, Monte Carlo ray tracer suitable for CST applications, and is currently under further development to to increase and improve its functionalities. Work has recently been performed to implement the following functionalities: a flux distribution calculation utility; materials with incidence angle dependent optical properties; and the ability to import 3D geometries fr...
The hydraulic hammer effect in solar tower fluid circuit temperature controller
Igreja, José; Marakkos, Costas; Lemos, Joao MThis article addresses the possible occurrence of hydraulic hammer effects in solar power towers and the limitations they impose on the response bandwidth of the control loop that governs the valve actuating on heating fluid flow. The partial differential equations that model the traveling waves associated to the hammer effect are solved with different methods. A finite dimensional approximation of the exact so...