Rigorous Design Process for a Groundwater Pump for Low-Yield Water Wells: A Case Study

2010 ◽  
Author(s):  
Peter Anderson ◽  
James Wonson ◽  
W. John Dartnall
Keyword(s):  
Developing Countries ◽  
Water Supply ◽  
Design Process ◽  
High Efficiency ◽  
Low Cost ◽  
Cost Effective ◽  
Production Volume ◽  
Tube Wells ◽  
Well Yield

Ground-water pumping in remote areas, such as Australian farms, was for many years traditionally done by wind pumps in order to satisfy the needs of stock. Since the 1980’s solar pumps of varying designs have become popular for pumping water from farm dams and tube wells. Wind pumps, solar pumps, engine or electric motor driven pumps and even animal/human powered pumps have a future in many remote situations in the world for stock watering, irrigation and for village water supply in developing countries. In these markets there is a wide-spread view that local manufacture of the pumps is preferable, as is well documented in the literature on village water supply in developing countries. Submersible pumps that are either of the multi-stage centrifugal class or that use the progressive cavity principle have increased in popularity in the low well yield environment. However, where well yields are extremely low the efficiency of these pumps also becomes low and oversized pumps of these kinds are often inappropriately applied. Quite often in the low yield situation, tube wells are also oversized in that they are drilled to large diameters and depths so as to provide storage in order to accommodate the water demand requirements of the user. This practice leads to unnecessary deterioration of both pump and well. Designing for low production volume manufacture presents unique challenges for the designer in attempting to design a robust, versatile but cost-effective product. The design challenges include, achievement of: - high efficiency, reliability, longevity, simplicity, versatility with a minimum parts count, and all this at a low cost. A case study is presented in this paper in which the design issues are outlined. A rigorous design process has been applied in this case study.

Life Cycle Product Design (at “Factor 10” Level): A Case Study Involving Innovative Mechanical Design of a Remote Area Ground Water Pumping System

2005 ◽  
Author(s):  
W. John Dartnall ◽  
Stephen Johnston
Keyword(s):  
Ground Water ◽  
Design Process ◽  
High Efficiency ◽  
Developed Countries ◽  
Design Development ◽  
Resource Productivity ◽  
Pumping System ◽  
Water Pumping ◽  
Well Yield

For humanity to be able to meet its needs without compromising the ability of future generations to meet their own, we must create a sustainable and customised service economy. For all the people of the world to be able to share in this goal, including both marginal operators in economically developed countries and most farmers in currently less economically developed countries, we need to increase resource productivity by a factor of 10. This paper describes a conceptual design process in which the designer is looking to achieve this factor 10 improvement at a system design level. Order of magnitude upgrading, on the performance of existing products, calls for an innovative approach to the design process. We outline a methodology, “Trend-Morph-PDS”, and show in a case study how it has been applied to the development of a ground-water pumping system. This type of system is in demand in geographically remote areas, where low well yield rates are typical, and rather complicated wind or solar pumps are commonly used for these “low-yield-well pumps”. The large number of products on the market demonstrates a wide and often conflicting range of trends in terms of design/development: long life/short life; high efficiency/low efficiency; problematic maintenance; absence of product range rationalisation. There is, however, a general trend towards replacement of mechanical with electrical-electronic systems. We argue that it would be possible to replace the currently dominant types of electrically driven submersible pump with a well designed mechanical system that has approximately twice the efficiency of its competitors and five times the design life. We recognise the commercial importance of the initial system cost, and we see no reason why our system should cost more than those of our existing competitors. Our case study indicates that factor 10 improvement in resource productivity is achievable in this application.

scholarly journals Chemical Modification of Combusted Coal Gangue for U(VI) Adsorption: Towards a Waste Control by Waste Strategy

2021 ◽  
Vol 13 (15) ◽  
pp. 8421
Author(s):  
Yuan Gao ◽  
Jiandong Huang ◽  
Meng Li ◽  
Zhongran Dai ◽  
Rongli Jiang ◽  
...  
Keyword(s):  
Structural Analysis ◽  
High Efficiency ◽  
Low Cost ◽  
Chemical Activation ◽  
Cost Effective ◽  
Coal Gangue ◽  
Order Kinetic ◽  
Practical Applications ◽  
Detailed Structural Analysis ◽  
Alkaline Conditions

Uranium mining waste causes serious radiation-related health and environmental problems. This has encouraged efforts toward U(VI) removal with low cost and high efficiency. Typical uranium adsorbents, such as polymers, geopolymers, zeolites, and MOFs, and their associated high costs limit their practical applications. In this regard, this work found that the natural combusted coal gangue (CCG) could be a potential precursor of cheap sorbents to eliminate U(VI). The removal efficiency was modulated by chemical activation under acid and alkaline conditions, obtaining HCG (CCG activated with HCl) and KCG (CCG activated with KOH), respectively. The detailed structural analysis uncovered that those natural mineral substances, including quartz and kaolinite, were the main components in CCG and HCG. One of the key findings was that kalsilite formed in KCG under a mild synthetic condition can conspicuous enhance the affinity towards U(VI). The best equilibrium adsorption capacity with KCG was observed to be 140 mg/g under pH 6 within 120 min, following a pseudo-second-order kinetic model. To understand the improved adsorption performance, an adsorption mechanism was proposed by evaluating the pH of uranyl solutions, adsorbent dosage, as well as contact time. Combining with the structural analysis, this revealed that the uranyl adsorption process was mainly governed by chemisorption. This study gave rise to a utilization approach for CCG to obtain cost-effective adsorbents and paved a novel way towards eliminating uranium by a waste control by waste strategy.

MECHANIZATION OF POTATO GRADING ON SMALL-SCALE FARMS: A CASE STUDY FROM PERU

2005 ◽  
Vol 41 (1) ◽  
pp. 81-92 ◽  
Author(s):  
G. P. BUTLER ◽  
T. BERNET ◽  
K. MANRIQUE
Keyword(s):  
Developing Countries ◽  
Market Integration ◽  
Low Cost ◽  
Farming System ◽  
Agricultural Products ◽  
Small Scale ◽  
Critical Aspect ◽  
Small Scale Farmers ◽  
Important Cash Crop

Potatoes are an important cash crop for small-scale producers worldwide. The move away from subsistence to commercialized farming, combined with the rapid growth in demand for processed agricultural products in developing countries, implies that small-scale farmers and researchers alike must begin to respond to these market changes and consider post-harvest treatment as a critical aspect of the potato farming system. This paper presents and assesses a low cost potato-grading machine that was designed explicitly to enable small-scale potato growers to sort tubers by size for supply to commercial processors. The results of ten experiments reveal that the machine achieves an accuracy of sort similar to commercially available graders. The machine, which uses parallel conical rollers, has the capacity to grade different tuber shapes and to adjust sorting classes, making it suitable for locations with high potato diversity. Its relatively low cost suggests that an improved and adapted version of this machine might enhance market integration of small-scale potato producers not only in Peru, but in other developing countries as well.

Experience with a Low-Cost Telemedicine System in Three Developing Countries

2003 ◽  
Vol 33 (1) ◽  
pp. 33-34 ◽  
Author(s):  
D J Vassallo ◽  
P Swinfen ◽  
R Swinfen ◽  
R Wootton
Keyword(s):  
Developing Countries ◽  
Solomon Islands ◽  
Low Cost ◽  
Cost Effective ◽  
First Year ◽  
Digital Cameras ◽  
Telemedicine System ◽  
The Poor ◽  
Charitable Trust ◽  
E Mail

The Swinfen Charitable Trust was established in 1998 with the aim of helping the poor, sick and disabled in the developing world. It does this by setting up simple telemedicine links based on e-mail to support doctors in isolated hospitals. The first telemedicine link was established to support the lone orthopaedic surgeon at the Centre for the Rehabilitation of the Paralysed (CRP) in Savar, near Dhaka in Bangladesh in July 1999. An evaluation of the 27 referrals made during the first year of operation showed that the telemedical advice had been useful and cost effective. Based on the success of the Bangladesh project, the Swinfen Charitable Trust supplied digital cameras and tripods to more hospitals in other developing countries. These are Patan Hospital in Nepal (March 2000), Gizo Hospital in the Solomon Islands (March 2000), Helena Goldie Hospital on New Georgia in the Solomon Islands (September 2000), and LAMB Hospital in Bangladesh (September 2000).

Sustainability Study of In-situ Hydroponic Vetiver System for Urban Wastewater Management in Developing Countries: A Theoretical Review

2020 ◽  
Vol 17 (4) ◽  
pp. 97-103
Author(s):  
Kaushik Ghosh ◽  
Arup Sarkar
Keyword(s):  
Developing Countries ◽  
Cost Effective ◽  
Developed Countries ◽  
Wastewater Management ◽  
Urban Wastewater ◽  
Current State ◽  
Cost Effective Alternative ◽  
Urban Wastewater Treatment

Urban wastewater management is a crucial challenge in the small and medium towns situated in the developing countries worldwide. These towns are also facing an increasing gap between infrastructure and population growth. A conventional approach to curb these problems is the application of cost-intensive electro-mechanical sewerage technologies, as adopted in developed countries. The first part of this paper derives a set of indicators to framework a sustainable urban wastewater treatment system by reviewing the current state of wastewater management in developing countries, for example, the sample case study being India. The second part evaluates the potential performance of the proposed alternative in-situ hydroponic vetiver system (HVS) against those set of sustainability indicators by reviewing the worldwide performance of the HVS. The objective of this paper is to assess the potential viability of the HVS as a sustainable and cost-effective alternative for developing countries. The current analysis can aid in mainstreaming the use of HVS in policy making and urban planning.

Equipment Integrated Information Acquisition System for Production Operation in Modern Job Shop

2010 ◽  
Vol 439-440 ◽  
pp. 1230-1234
Author(s):  
Yan He ◽  
Fei Liu ◽  
Qi Feng Wang
Keyword(s):  
Information Acquisition ◽  
High Efficiency ◽  
Job Shop ◽  
Low Cost ◽  
Service Level ◽  
Acquisition System ◽  
Production Operation ◽  
Application Systems ◽  
Integrated Information

Information acquisition plays an important role on the production operation of modern job shop to achieve the goals of high efficiency, good quality, low cost, little resource consumption and low environmental impacts. This paper proposes the equipment integrated information acquisition system, the objective of which is to sense or collect the on-site information related with production operation in order to support managers’ decision-making or other application systems as basic data. The system architecture is constructed with five layer components. Furthermore, the two supporting technologies of the system are presented including the adapter definition in the adapter level and the establishment of template repository in the service level. Finally, the case study of the system is demonstrated by the application of acquiring production progress information in machining job shop.

How cost effective is universal varicella vaccination in developing countries? A case-study from Colombia

Vaccine ◽  
2013 ◽  
Vol 31 (2) ◽  
pp. 402-409 ◽  
Author(s):  
Angel Paternina-Caicedo ◽  
Fernando De la Hoz-Restrepo ◽  
Oscar Gamboa-Garay ◽  
Carlos Castañeda-Orjuela ◽  
Martha Velandia-González ◽  
...  
Keyword(s):  
Developing Countries ◽  
Cost Effective ◽  
Varicella Vaccination

Ways to get water: rainwater utilization or long-distance water supply? A holistic assessment

1997 ◽  
Vol 36 (8-9) ◽  
pp. 313-318 ◽  
Author(s):  
Thilo Herrmann ◽  
Karin Hasse
Keyword(s):  
Water Supply ◽  
Market Price ◽  
Cost Effective ◽  
Supply System ◽  
Long Distance ◽  
Retention Capacity ◽  
Drinking Water Supply System ◽  
Holistic Assessment ◽  
Stormwater Retention

On the basis of a case study the costs of an existing long-distance drinking water supply system are compared to the potentiel costs of decentralized rainwater collection und usage systems. The costs of stormwater retention are included in the calculations in so far as rainwater utilization systems provide a retention capacity for stormwater in the cisterns. The results show, that in dependence of the market price of the rainwater usage systems, the decentral way to provide usage water to the households can be more cost effective compared to a central long-distance supply system.

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