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Lecablock, an Alternative Construction Material for the Exterior Walls of Passive House

Journal of Building Construction and Planning Research 2014年第2期2卷 96-108页

作者： Osama A.B.Hassan petra jonsson Department of Science and Technology Linkoping UniversityNorrkopingSweden petra jonsson Lindbacks byggPiteaSweden

In this paper it is attempted to investigate the Leca blocks as sustainable construction material for the exterior walls of passive house. The building physical properties of Leca design wall structure are studied along with the environmental impact and load-bearing capacity. To compare the results, a similar analysis is carried out considering the traditional wooden wall construction of passive houses. The results showed that Leca design wall structure can be an alternative sustainable solution to the traditional wooden wall structure of passive house, mainly due to its low U-value, its ability to handle moisture, and comparable structural load-bearing capacity. However, the wooden wall structure is more environmentally friendly than the Leca blocks due to its lower emissions to the environment and reduced energy use, especially during the manufacturing process.

关键词： U-Value Moisture Thermal Bridges Passive House Energy Efficiency Load-Bearing Capacity

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Particle focusing by 3D inertial microfluidics

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Microsystems & Nanoengineering 2017年第1期3卷 204-211页

作者： petra Paiè Francesca Bragheri Dino Di Carlo Roberto Osellame Istituto di Fotonica e Nanotecnologie(IFN)-CNR and Dipartimento di Fisica-Politecnico di Milano Piazza Leonardo da Vinci 3220133 MilanItaly Department of Bioengineering Department of Mechanical EngineeringCalifornia NanoSystems Instituteand Jonsson Comprehensive Cancer CenterUniversity of California-Los Angeles420 Westwood Plaza5121 Engineering VLos AngelesCA 90095USA

Three-dimensional(3D)particle focusing in microfluidics is a fundamental capability with a wide range of applications,such as on-chip flow cytometry,where high-throughput analysis at the single-cell level is ***,3D focusing is achieved mainly in devices with complex layouts,additional sheath fluids,and complex pumping *** this work,we present a compact microfluidic device capable of 3D particle focusing at high flow rates and with a small footprint,without the requirement of external fields or lateral sheath flows,but using only a single-inlet,single-outlet microfluidic sequence of straight channels and tightly curving vertical *** device exploits inertial fluidic effects that occur in a laminar regime at sufficiently high flow rates,manipulating the particle positions by the combination of inertial lift forces and Dean drag *** device is fabricated by femtosecond laser irradiation followed by chemical etching,which is a simple two-step process enabling the creation of 3D microfluidic networks in fused silica glass *** use of tightly curving three-dimensional microfluidic loops produces strong Dean drag forces along the whole loop but also induces an asymmetric Dean flow decay in the subsequent straight channel,thus producing rapid cross-sectional mixing flows that assist with 3D particle *** use of out-of-plane loops favors a compact parallelization of multiple focusing channels,allowing one to process large amounts of *** addition,the low fluidic resistance of the channel network is compatible with vacuum driven *** resulting device is quite interesting for high-throughput on-chip flow cytometry.

关键词： 3D fluidic network 3D particle focusing Dean flow inertial microfluidics

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