1,721,315 research outputs found
State of the Art and Potentials of Additive Manufactured Earth (AME)
No full textAdditive production techniques such as 3D printing and robotics enable new production methods and possible uses for earth, as one of the most ancient building materials in the building industry. This study examines the potential of different building elements and components and their possible combinations made of or containing earthen building products. In addition to the 3D printing of lightweight, highly insulating external and heavy internal wall elements and load-bearing rammed earth walls for use as inner and outside walls are compared. Furthermore, the activation of the walls with water-based heating and cooling elements is taken into consideration. In particular, the sensitivity of earth to humidity and water has a positive effect on all life cycle phases from production through operation as a low-tech building to the end of use, i.e. the reuse as well as the possible return to natural cycles. The focus of the study is to assess the building material earth in light of modern production methodologies, the impact on indoor comfort and indoor air quality as well its life cycle assessment.Design of Construtio
Geometry Acquisition with Computer Vision Applied to Waam
No full text3D printing with metal, applied to thin non-flat surfaces, requires a digital reconstruction of the 3D surface that will be used as a build plate for the wire arc welding manufacturing process. This article describes an experimental workflow of three-dimensional scanning of thin metal plates using a low-cost hardware setup with depth cameras and computer vision. The process allows users to scan, rebuild a 3D model, generate the code for the welding robot, and update the data continuously through the entire welding process. This update is required to analyse and rectify any change of the surface and the height of the welded layers. The result of this article presents the scanning work-flow, the CAD 3D model, the method used to check the accuracy of the digital reconstruction, and the application of the collected data transferred as coordinates to carry out the WAAM process over a 1 mm steel plate. The long-term goal of this research is to generate a closed-loop of printing and real-time feedback to change the original printing workflow that is based on an open-loop, typical from off-the-shelf 3D printers
Print! Architecture
No full text3D printing has matured from a hobbyist and prototyping tool to a technology with potential to disrupt entire industries in and around the built environment. The developments in additive manufacturing are transforming architecture and design no less than they impact engineering and construction. The book portrays the rapid advances in research and industrial processes that have paved the road for this upheaval. In five chapters that cover historical development, engineering aspects, the digital design process, interactions with other technologies and potential for functionalization through additive manufacturing, the editors have curated a text that illustrates how a complex network of actors inspires and influences each other to make this technological transformation possible. The book follows the trail of scientists who prove the technology’s viability and documents design explorations, prototypes and entire buildings that are demonstrating their readiness for the commercial market
Solar concentrating façade
No full textThe search for renewable energy sources is a wide area in which significant progress is still expected. This paper focuses on an energy system that uses Fresnel lenses to concentrate sunlight on a tubing system to heat up the working fluid. Fresnel lenses are lighter, thinner and cheaper to build than ordinary lenses. The model is designed to be integrated into the façade of a building that will then be heated or cooled using the energy extracted from sunlight. Details of the concept have been given in Tsoutsou et al. (2014) in which the viability of the concept was investigated and its energy saving and economic benefits have been quantified. A prototype façade of 1.5 x 3.6m, with 3 m2 Fresnel lens area, has been constructed as a proto-type and tested in a standard office size of a dummy building. This paper presents the experimental performance of the solar concentrating façade and identifies advantages and disadvantages of the solar system. A model has been developed to predict the effect of design choices. This model is used to identify potential optimization strategies. In addition to the suntracking method, mass flow through the collectors can be adjusted to achieve maximum efficiency of the Fresnel collectorsEngineering Thermodynamic
A zero-energy refurbishment solution for residential apartment buildings by applying an integrated, prefabricated façade module
No full textThe ambition to renovate the post-war building stock to an energy-neutral quality is getting a lot of attention in social housing association and other institutional owners, financial institutions and users. The Energy Agreement for Sustainable Growth indicates that 300.000 dwellings have to be renovated in the Netherlands annually. An effective renovation plan has to be long-term, target the deep transformation of the existing building stock, and to significantly improve its actual energy performance towards nearly zero energy levels. This level of energy saving typically requires a holistic approach, viewing the renovation as a package of measures working together.Even though the need for refurbishment is urgent, the rate of renovation and the resulting energy savings are relatively low. Main barriers identified are related to the available investment funds, awareness, advice and skills and the separation of expenditure and benefit.To address these issues, the paper presents a prefabricated and integrated façade module that gives the possibility to improve the current energy performance up to zero energy, while ensuring minimum disturbance for the occupants, during and after the renovation. Given that the design and installation take this constrain into consideration, it is possible to reach zero energy by adding more efficient installations and energy generation, as well as taking possible behavioural changes into account.Moreover, the paper evaluates such a zero-energy refurbishment in terms of financial feasibility. The proposed approach results in a feasible solution, which achieves high energy savings and addresses the complex issue of integrated refurbishment.Design of ConstrutionDesign Conceptualization and CommunicationApplied Ergonomics and Desig
- …
