scholarly journals Flexible distillation test rig on a laboratory scale for characterization of additively manufactured packings

2021 ◽  
Author(s):  
Johannes Neukäufer ◽  
Nadin Sarajlic ◽  
Harald Klein ◽  
Sebastian Rehfeldt ◽  
Heiko Hallmann ◽  
...  
Keyword(s):  
Process Development ◽  
Separation Efficiency ◽  
Packed Column ◽  
Laboratory Scale ◽  
Test Rig ◽  
Laboratory Equipment ◽  
Column Wall ◽  
First Results ◽  
3D Printed ◽  
Scale Test

Additive manufacturing is increasingly being used to develop innovative packings for absorption and desorption columns. Since distillation has not been in focus so far, this paper aims to fill this gap. The objective is to obtain a miniaturized 3D printed packed column with optimized properties in terms of scalability and reproducibility, which increases process development efficiency. For this purpose, a flexible laboratory scale test rig is presented combining standard laboratory equipment with 3D printed components such as innovative multifunctional trays or the column wall with packing. The test rig offers a particularly wide operating range (F=0.15 Pa…1.0 Pa) for column diameters between 20 mm and 50 mm. First results regarding the time to reach steady-state, operational stability and separation efficiency measurements are presented using a 3D printable version of the Rombopak 9M. Currently, innovative packings are being characterized, which should exhibit a optimized bevavior regarding scalability, reproducibility and separation efficiency.

Design and testing of a laboratory scale test rig for wave energy converters using a double‐sided permanent magnet linear generator

2017 ◽  
Vol 11 (7) ◽  
pp. 922-930 ◽  
Author(s):  
Addy Wahyudie ◽  
Mohammed Jama ◽  
Tri Bagus Susilo ◽  
Bisni Fahad Mon ◽  
Hussein Shaaref ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Wave Energy ◽  
Laboratory Scale ◽  
Test Rig ◽  
Linear Generator ◽  
Wave Energy Converters ◽  
Scale Test ◽  
Design And Testing ◽  
Energy Converters

Comparison of Active Control Algorithms for Rotor Unbalance Compensation

2007 ◽  
Author(s):  
Kari Tammi ◽  
Antti Laiho
Keyword(s):  
Active Control ◽  
Control Algorithm ◽  
Laboratory Scale ◽  
Experimental Comparison ◽  
Control Algorithms ◽  
Electromagnetic Actuator ◽  
Electrical Machine ◽  
Test Rig ◽  
Short Introduction ◽  
Scale Test

This paper shows a short introduction to three unbalance compensation algorithms and an experimental comparison of those algorithms. The algorithms have been tested experimentally on a laboratory-scale test rig equipped with an electromagnetic actuator. So called Convergent Control algorithm has been found the most suitable for the current purpose in terms of performance and simplicity. The algorithms are subjected further tests on rotor unbalance compensation in an electrical machine. This paper shows some initial considerations for those further tests.

scholarly journals 3D printing – a key technology for tailored biomedical cell culture lab ware

2016 ◽  
Vol 2 (1) ◽  
pp. 105-108 ◽  
Author(s):  
Florian Schmieder ◽  
Joachim Ströbel ◽  
Mechthild Rösler ◽  
Stefan Grünzner ◽  
Bernd Hohenstein ◽  
...  
Keyword(s):  
Cell Culture ◽  
3D Printing ◽  
Ex Vivo ◽  
Vascular Perfusion ◽  
Laboratory Equipment ◽  
Key Technology ◽  
Cell Culture Systems ◽  
First Results ◽  
3D Printed

AbstractToday’s 3D printing technologies offer great possibilities for biomedical researchers to create their own specific laboratory equipment. With respect to the generation of ex vivo vascular perfusion systems this will enable new types of products that will embed complex 3D structures possibly coupled with cell loaded scaffolds closely reflecting the in-vivo environment. Moreover this could lead to microfluidic devices that should be available in small numbers of pieces at moderate prices. Here, we will present first results of such 3D printed cell culture systems made from plastics and show their use for scaffold based applications.

scholarly journals Heat Release Kinetics upon Water Vapor Sorption Using Cation-Exchanged Zeolites and Prussian Blue Analogues as Adsorbents: Application to Short-Term Low-Temperature Thermochemical Storage of Energy

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3505
Author(s):  
Salma Benzaria ◽  
Ekaterina Mamontova ◽  
Yannick Guari ◽  
Joulia Larionova ◽  
Jérôme Long ◽  
...  
Keyword(s):  
Water Vapor ◽  
Heat Release ◽  
Prussian Blue ◽  
Gas Flow ◽  
Laboratory Scale ◽  
Heat Extraction ◽  
Test Rig ◽  
Short Term ◽  
Scale Test ◽  
Integral Heat

In view of potential uses in short-term thermochemical heat storage by sorption of water vapor, the capacity to release a sufficient heat amount at the appropriate rate of a Prussian blue analogue (PBA) containing hexacyanocobaltate vacancies has been compared with those of 13X type zeolites possessing Na+, Ce3+, Ce4+, or Tb3+ extra-framework compensating cations. The extended structural and surface characterization demonstrated good reproducibility of the preparation procedures performed on a 10-g scale. The adsorbents were tested under dynamic conditions of gas flow with the aid of either a gas flow calorimeter (120 mL h−1 helium flow) to measure the amount and rate of the integral heat release or a laboratory-scale test rig (15,000 to 22,800 mL h−1 nitrogen flow) to monitor the outlet temperature of nitrogen heated by adsorption. For a regeneration temperature of 353 K and a partial H2O pressure of 2.8 kPa in helium, the PBA sample yielded an integral heat ranging between 900 and 1020 kJ kg−1 with a very slow heat release lasting for even 12–14 h. The zeolite-based materials generated between 350 and 950 kJ kg−1 more rapidly (up to 6–7 h), depending on the nature and the content of compensating cations, as well as on the dehydration state achieved during regeneration. With the laboratory-scale test rig, the efficiency of heat extraction by convection was about 65% for Na-13X and only 38% for PBA, and it diminished with decreasing flow rate.

scholarly journals Study of high-temperature oxygen combustion (HiTOx) and its heating performance using a laboratory-scale test furnace

2021 ◽  
pp. 117077
Author(s):  
Hisashi Nakamura ◽  
Yuji Kuwayama ◽  
Takakazu Onishi ◽  
Takuya Tezuka ◽  
Susumu Hasegawa ◽  
...  
Keyword(s):  
High Temperature ◽  
Laboratory Scale ◽  
Heating Performance ◽  
Scale Test ◽  
Test Furnace

scholarly journals 3D Printed Clamps for In Vitro Tensile Tests of Human Gracilis and the Superficial Third of Quadriceps Tendons

2021 ◽  
Vol 11 (6) ◽  
pp. 2563
Author(s):  
Ivan Grgić ◽  
Vjekoslav Wertheimer ◽  
Mirko Karakašić ◽  
Željko Ivandić
Keyword(s):  
3D Printing ◽  
Fused Deposition Modeling ◽  
Tensile Tests ◽  
Biomechanical Properties ◽  
Testing Procedure ◽  
Laboratory Equipment ◽  
Fused Deposition ◽  
Custom Made ◽  
3D Printed

Recent soft tissue studies have reported issues that occur during experimentation, such as the tissue slipping and rupturing during tensile loads, the lack of standard testing procedure and equipment, the necessity for existing laboratory equipment adaptation, etc. To overcome such issues and fulfil the need for the determination of the biomechanical properties of the human gracilis and the superficial third of the quadriceps tendons, 3D printed clamps with metric thread profile-based geometry were developed. The clamps’ geometry consists of a truncated pyramid pattern, which prevents the tendons from slipping and rupturing. The use of the thread application in the design of the clamp could be used in standard clamping development procedures, unlike in previously custom-made clamps. Fused deposition modeling (FDM) was used as a 3D printing technique, together with polylactic acid (PLA), which was used as a material for clamp printing. The design was confirmed and the experiments were conducted by using porcine and human tendons. The findings justify the usage of 3D printing technology for parts manufacturing in the case of tissue testing and establish independence from the existing machine clamp system, since it was possible to print clamps for each prepared specimen and thus reduce the time for experiment setup.

scholarly journals Study of the Biodegrability of Degradable/Biodegradable Plastic Material in a Controlled Composting Environment

2012 ◽  
Vol 19 (3) ◽  
pp. 347-358 ◽  
Author(s):  
Magdalena Vaverková ◽  
František Toman ◽  
Dana Adamcová ◽  
Jana Kotovicová
Keyword(s):  
Plastic Material ◽  
Laboratory Scale ◽  
Biodegradable Plastic ◽  
Preliminary Evaluation ◽  
The Czech Republic ◽  
Chain Stores ◽  
Plastic Bags ◽  
Plastic Materials ◽  
Scale Test

Study of the Biodegrability of Degradable/Biodegradable Plastic Material in a Controlled Composting EnvironmentThe objective of this study was to determine the degrability/biodegradability of disposable plastic bags available on the market that are labeled as degradable/biodegradable and those certified as compost. The investigated materials were obtained from chain stores in the Czech Republic and Poland. Seven kinds of bags (commercially available) were used in this study. One of them was a disposable bag made of HDPE and mixed with totally degradable plastic additive (TDPA additive). Another was a disposable made of polyethylene with the addition of pro-oxidant additive (d2w additive). One was labeled as 100% degradable within various periods of time, from three months up to three years, and four were certified as compostable. The test was carried out in a controlled composting environment. The biodisintegration degree of the obtained pieces was evaluated following a modified version of ČSN EN 14806 Norm "Packaging - Preliminary evaluation of the disintegration of the packaging materials under simulated composting conditions in a laboratory scale test" and a modified version of ČSN EN ISO 20200 "Plastics - Determination of the degree of disintegration of plastic materials under simulated composting conditions in laboratory-scale test" (ISO 20200:2004). The emphasis was put on determination whether the bags are degradable/biodegradable or not.

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