Perancangan Permanent Magnet Synchronous Generator Kapasitas 22 KVA Menggunakan Metode Finite Element Method

Software berbasis Finite Element Method (FEM) dapat digunakan untuk perancangan generator dikarenakan mampu membuat suatu model generator dengan menampilkan bentuk, cara kerja dan medan magnet pada generator. Kelebihan lainnya yaitu dapat menampilkan energi listrik yang dihasilkan oleh generator dalam bentuk kurva karakteristik tegangan, arus, daya masukan, daya keluaran, torsi dan efisiensi generator. Rancangan dibuat dengan menggunakan kombinasi pemodelan 12 slot 8 pole (12S8P). Tujuan penelitian ini adalah menganalisa hasil perbandingan pengujian rancangan generator sinkron magnet permanent dengan dilakukan pengujian simulasi variasi beban pada generator. Hasil uji simulasi berbeban dilakukan analisa dengan melihat grafik besaran tegangan, arus, torsi, daya masukan, daya keluaran dan efisiensi pada generator. Generator dengan output efisiensi terbesar pada perancangan 12 slot 8 Pole sebesar 94 % dengan tegangan output sebesar 445,01 V, arus sebesar 63,58 A torsi sebesar 232,88 Nm, daya masukan sebesar 21948,29 Watt, daya keluaran sebesar 20525,16 Watt. Oleh karena itu variasi beban pada perancangan generator mempengaruhi nilai dari hasil keluaran generator tersebut.

IFC-CENTRIC VEGETATION MODELLING FOR BIM

There has been a growing interest in integrating vegetation into the built environment in order to ameliorate the negative effects of increasing urbanisation. In Singapore, government policies encourage the inclusion of skyrise greenery into new and existing buildings. To further streamline workflows, statutory BIM (Building Information Modelling) submissions in architecture, engineering and construction (AEC) industries have been mandated. However, landscape plans are still excluded from these BIM submissions due to the lack of a centralised vegetation database and the absence of a standardised BIM format for landscape architectural submissions. This paper presents a streamlined methodology for creating and using a centralised vegetation library for landscape architects. The workflow leverages off the Industry Foundation Classes (IFC) standard for data exchange regardless of the BIM authoring software used and provides a framework of four operational modules: an expandable and low-maintenance species-level vegetation library, a BIM authoring workflow that allows inclusion of vegetation objects, an IFC interface, and a lightweight 3D vegetation model generator. This paper also showcases a use-case of embedding information-enriched 3D vegetation objects into a simulated landscape plan. The proposed workflow, when adopted in AEC industries, will enable governing agencies to track diverse greening efforts by the industry and to potentially include other measurements such as cooling performance or maintainability.

Towards a circular built environment

PurposeThe transition to a circular economy in the built environment is key to achieving a resource-effective society. The built environment can be made more circular by applying circular building components. The purpose of this paper is to present a design tool that can support industry in developing circular building components.Design/methodology/approachThe tool was developed and tested in five steps. In Step 1, the authors analysed existing circular design frameworks to identify gaps and develop requirements for the design tool (Step 2). In Step 3, the authors derived circular design parameters and options from existing frameworks. In Step 4, the authors combined and specified these to develop the “circular building components generator” (CBC-generator). In Step 5, the CBC-generator was applied in the development of an exemplary component: the circular kitchen and tested in a student workshop.FindingsThe CBC-generator is a three-tiered design tool, consisting of a technical, industrial and business model generator. These generators are “parameter based”; they consist of a parameter-option matrix and design canvasses. Different variants for circular components can be synthesised by filling the canvasses through systematically “mixing and matching” design options.Research limitations/implicationsThe developed tool does not yet support establishing causal links between “parameter-options” and identification of the most circular design variant.Practical implicationsThe CBC-generator provides an important step to support the building industry in developing and implementing circular building components in the built environment.Originality/valueWhilst existing tools and frameworks are not comprehensive, nor specifically developed for designing circular building components, the CBC-generator successfully supports the integral design of circular building components. First, it provides all the design parameters which should be considered; second, it provides extensive design options per parameter; and third, it supports systematic synthesis of design options to a cohesive and comprehensive circular design.

Covidex: an ultrafast and accurate tool for virus subtyping

SummaryCovidex is an open-source, alignment-free machine learning subtyping tool for viral species. It is a shiny app that allows a fast and accurate classification in pre-defined clusters for SARS-CoV-2 and FMDV genome sequences. The user can also build its own classification models with the Covidex model generator.AvailabilityCovidex is open-source, cross-platform compatible, and is available under the terms of the GNU General Public License v3 (http://www.gnu.org/licenses/gpl.txt). Covidex is available via SourceForge https://sourceforge.net/projects/covidex or the web application https://cacciabue.shinyapps.io/shiny2/[email protected]; [email protected]