A new approach to solar desalination for small- and medium-size use in remote areas

Desalination ◽  
2001 ◽  
Vol 139 (1-3) ◽  
pp. 35-41 ◽  
Author(s):  
Herbert Kunze
Keyword(s):  
Medium Size ◽  
New Approach ◽  
Remote Areas ◽  
Solar Desalination

scholarly journals A New Approach to Solar Desalination Using a Humidification–Dehumidification Process for Remote Areas

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1120
Author(s):  
Mishal Alsehli
Keyword(s):  
Solar Energy ◽  
Solar Collector ◽  
Critical Issue ◽  
Feed Water ◽  
Daily Production ◽  
New Approach ◽  
Remote Areas ◽  
Solar Desalination ◽  
Two Phases ◽  
Solar Powered

Freshwater supply in remote areas has become a critical issue. This paper aims to introduce a new approach to a solar-powered humidification–dehumidification (HDH) desalination system. The design uses a solar collector, a thermal storage tank, and an HDH unit. The HDH works continuously by feeding water to absorb solar energy during the day and then relaying the desalination units with feed water at a top brine temperature (TBT) at night. The model predicts the amount of solar energy stored for the next day, and based on this, the amount of feed water that should be raised to the TBT is calculated. The system operation is carried out in two phases. During the day, the feed water absorbs the heat of solar energy, thereby increasing its temperature to TBT. This hot feed water is then kept in storage tanks. At night, the tank switches to discharging mode and starts feeding the HDH with the hot feed water. The system is designed so that the roles of the tank are rotated at sunset. To achieve the same TBT every day in response to changes in the available solar energy, the mass of the feed water is adjusted daily. The design is simulated using a dynamic model of the energy and mass balance resulting in an average daily production of 7.6 kg of fresh water per unit area of the solar collector. The daily average of the gain output and the recovery ratios are 0.3 and 0.09 respectively.

Flexible and Intelligent Gripping Technology for Machining and Handling of Spatially Curved Extruded Aluminum Profiles

2006 ◽  
Vol 10 ◽  
pp. 153-162 ◽  
Author(s):  
G. Lanza ◽  
Jürgen Fleischer ◽  
Daniel Ruch
Keyword(s):  
Extrusion Process ◽  
Frame Structures ◽  
Medium Size ◽  
Light Weight ◽  
Batch Production ◽  
New Approach ◽  
Process Chains ◽  
Clamping System ◽  
Aluminum Profiles ◽  
Flexible Machines

With a novel extrusion process which is investigated in the Collaborative Research Center Transregio 10 (SFB/TR10), it is possible to manufacture spatially curved aluminum profiles. This process is the base for an automated small and medium size batch production of light-weight frame structures. For the handling and machining of the spatially curved profiles, highly flexible machines and manufacturing equipment are needed. Today’s automated process chains do not reach a sufficient flexibility. This article introduces a new approach to handle and machine spatially curved profiles using a flexible gripping and clamping system. Firstly, the requirements concerning the process comprehensive gripping technology, which have to be fulfilled for a flexible small and medium batch production of light-weight frame structures, are specified. Subsequently, the function and design of a flexible gripping and clamping system are described. Furthermore, metrological processes to maintain a once reached condition of order during the entire process chain are depicted.

scholarly journals Substitutive Press-Bolster and Press-Ram Models for the Virtual Estimation of Stamping-Tool Cambering

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 279
Author(s):  
Farshad Abbasi ◽  
Alex Sarasua ◽  
Javier Trinidad ◽  
Nagore Otegi ◽  
Eneko Saenz de Argandoña ◽  
...  
Keyword(s):  
Cost Effective ◽  
Medium Size ◽  
Error Sources ◽  
Static Loads ◽  
New Approach ◽  
Beam Elements ◽  
Large Size ◽  
The Press ◽  
Final Adjustment ◽  
Tooling System

Today’s stamping simulations are realized by ignoring the elastic deformation of the press and tooling system through the assumption of a rigid behavior and a perfect press stroke. However, in reality, the press and tool components deform elastically and are one of the major error sources for the final adjustment and blue-spotting of the dies. In order to tackle this issue, a new approach is proposed in this study that substitutes the press stiffness by means of a substitutive model composed of cost-effective shell and beam elements. The substitute model was calibrated using full-scale measurements, in which a 20,000 kN trial press was experimentally characterized by measuring its deformation under static loads. To examine the robustness of the substitute model, a medium-size tool and a large-size tool were simulated together with the substitutive model. To this end, a B-pillar tool was re-machined based on the substitute-model results and a new cambering procedure was proposed and validated throughout the blue-painting procedure. The newly developed substitute model was able to replicate the global stiffness of the press with a high accuracy and affordable calculation time. The implementation of the findings can aid toolmakers in eliminating most of the reworking and home-line trials.

A New Approach to Airline Economics The Vehicle Millemile (VMM)

1966 ◽  
Vol 70 (668) ◽  
pp. 814-818
Author(s):  
R. W. E. Willis
Keyword(s):  
Medium Size ◽  
Total Revenue ◽  
New Approach ◽  
Orbital Flight ◽  
The Cost ◽  
Revenue Mix ◽  
Interplanetary Flight

A Vehicle Millemile is a 1000-mile unit of flight production. A big jet may cost in total £1500 to fly 1000 statute miles or 1 VMM.If 6 tons of passengers (or 60 passengers and their free baggage) earn £200/Paxton Ton-Millemile x 6=£1200, and the revenue from 3 tons of cargo is £100/Load Ton-Millemile x 3=£300, it is simple economics to see that this “mix” will provide breakeven with 9 tons load on board and a total revenue mix of £1200 + £300=£1500/VMM or per 1000 miles. A big jet flying 1600 VMMs per annum at £1500/VMM costs £2.4m and the above passenger and cargo ton factors would provide sufficient revenue to break even.In a few seconds, therefore, we have ascertained the composite “mix” of load and revenue needed to meet the cost of flying the aircraft 1000 miles, and the answers are far more enlightening than saying that an average 60 passengers are carried at 4.8 d/PM and 2721 kg of cargo are carried at 24 d/LTM.The fact that many medium size or small airlines have route stagelengths of less than one Vehicle Millemile at 500 miles or 200 miles makes no difference to the validity of ease of application of VMM Economics, but its great value Jies in the study of intercontinental big jet operations, SST analysis, sub-orbital flight and even interplanetary flight costing.

Platform Development of Tick Collection Robot

2021 ◽  
Author(s):  
Yesiliang Qiu ◽  
Janet Dong ◽  
Caroline “Niki” Harrison Moretto
Keyword(s):  
High Performance ◽  
Vision System ◽  
Stationary Mode ◽  
Continuous Mode ◽  
New Approach ◽  
Driving System ◽  
Us Army ◽  
Remote Areas ◽  
Platform Development ◽  
Robot Platform

Abstract This paper discusses the design, building, and testing of a novel robot that is used to collect ticks in a variety of rugged terrains in remote areas. The robot provides a new approach for US Army Medical Researchers or other biologists to collect the insects remotely by using a robot equipped with a vision system and GPS. The approach will change the way that insects are being collected with automation instead of human manual work. The robot is designed to operate in different terrains, including soft grass, dirt, muddy soil, and rocky surface. The robot is weighted within 30 lbs., so the army staff or soldiers can easily carry it to the field. The tick collection robot consists of a robust platform, a driving system, an assembled flag section for high-performance tick selection, and GPS and vision system for autonomous control. There are two modes for tick collection: Continuous mode and stationary mode. In the continuous mode, the robot can run 3 hours continuously, and in the stationary mode, the robot can operate 6 hours at one location to collect ticks. The robot platform is about 29.64 lbs. without stationary components, which makes it easy to carry. The driving system enables the robot to run through various types of the above-mentioned locations and obstacles. The assembly flag component will make it easy to collect and clean the tick attached to its porous surface.

scholarly journals Corporatism in Korea: a Yuhan case study

2017 ◽  
Vol 15 (3) ◽  
pp. 295-305
Author(s):  
Hoppi Yoon
Keyword(s):  
Safety Net ◽  
Medium Size ◽  
Public And Private ◽  
New Approach ◽  
Korean Society ◽  
Lower Middle Class ◽  
Commercial Society ◽  
The Public ◽  
Model Of Management

Yuhan is a small-and-medium-size pharmaceutical manufacturing company in South Korea (Korea). It is well known in the industry as a paragon of credibility and sustainability. Concerning the small-but-powerful firm’s remarkable triumph, over the past two decades, a number of academics and researchers have examined the model of management within the context of business management. Yet the firm’s corporatist management in terms of validity should be considered beyond the area of business administration. Unlike previous academic works, this paper assesses the Yuhan experiments within the context of corporate corporatism. The chief argument of this new approach is that corporatism and solidarity grounded Yuhan campaign (stark contrast concepts of neoliberal management) may offer meaningful lessons for the neoliberalism embedded Korean commercial society. While infrastructural conditions of both the public and private sectors are feeble to upheld corporatism, Yuhan style corporate corporatism, as a harbinger of social democratic corporatism, could be an alternative model to supplement such weakness. In rivalry with neoliberal campaigns that persistently creates social polarization and disunity; the solidarism-based Yuhan model would work a solution to overcome threadbare safety net for working and lower middle class in Korean society.

Sign in / Sign up

Export Citation Format

Share Document