Show Bid Request
Create dynamic Pump/Valve models in VB or VC++
Bid Request Id: 55612
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Posted by: |
Totalfit (3 ratings)
(Software buyer rating 10 )
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Non-action Ratio: |
Bad - 66.67%
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Buyer Security Verifications: |
Good
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Approved on: |
Mar 31, 2003
3:50:41 PM EDT
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Bidding Closes: |
Apr 14, 2003
3:28:57 PM EDT
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Viewed (by coders): |
254 times
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Deadline: |
4/15/2003
TIME EXPIRED
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Description:
Here's a challenging one. I need some one to create dynamic models of process devices for the following items:
Valve - varying types, liquid and Gas
Pump - varying types, liquid and gas
Vessel - sealed and open
Flow Spliter (Splits one flow stream to Multiple resultant streams with flow/temp/pressure)
Flow Mix (joins multiple flow streams to one resultant flow/temp/pressure)
Each model should have the following resultant properties: temp out, pressure out, flow out
The models will be have all relevant engineering info entered by setting model properties (ie CV, Valve Type, etc...).
The models can use standard Engineering equations or dynamic time based models if coder thoroughly understands the use.
The coder will have to determine the correct equations to do this.
The coder will bid a combined price
The coder will make a basic gui (textbox or whatever_ to demonstrate the calculations in response to varying process values
All flows should be in mass units
Deliverables:
1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done.
2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request.
3) Complete ownership and distribution copyrights to all work purchased.
Platform:
win 2000/xp
Must be 100% finished and received by buyer on:
Apr 15, 2003 EDT
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Bidding/Comments:
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All monetary amounts on the site are in United States dollars.
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| Name |
Bid Amount
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Date |
Coder Rating |
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N/A
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Mar 31, 2003
5:05:47 PM EDT
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10
(Excellent)
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I would be interested in tackling this project.
Here is the relevant section of my CV:
A Zambian mining company was building a world-scale electrochemical cobalt refinery. Low grade cobalt ore would be dissolved in acid, pumped through filter and purification steps until pure metal could be deposited by passing electricity through the acid solution. However, only a percentage of the dissolved cobalt could be extracted, so the solution must be recirculated through further filtration and purification steps back to the beginning. The recirculating cobalt load would be worth millions of dollars, an expense which without careful management could quickly grow by several hundred percent. In the worst case, cobalt ore, acid and other chemicals could be pored into this plant without obtaining a speck of cobalt, just an ever growing volume of dirty acid with a per cent or two of dissolved cobalt. James consulted on this project, simulating the refinery, and providing means of controlling and minimizing the ‘lost&' cobalt. The simulation considered 170 process flows, each of ten constituents ( acid, cobalt, copper, etc ) through 120 processors of six different kinds. Such a system does not converge in a reasonable time, even on a fast mainframe. For most starting conditions it does not converge at all. James invented a method of approximation and iteration to accelerate convergence. This work was described in Ian Johnstone&'s paper to APCOM ‘84.
I need some more information in order to make a bid:
1. A precise list of the models you require.
2. Are these models supposed to stand alone, or will they be connected together so that the input to one will be the input to the next?
3. A better definition of the modelling equations you require. The best thing here would be a pointer to a reference available online.
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$100 (USD)
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Apr 1, 2003
9:55:07 AM EDT
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10
(Excellent)
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I would be interested in tackling this project.
Here is the relevant section of my CV:
A Zambian mining company was building a world-scale electrochemical cobalt refinery. Low grade cobalt ore would be dissolved in acid, pumped through filter and purification steps until pure metal could be deposited by passing electricity through the acid solution. However, only a percentage of the dissolved cobalt could be extracted, so the solution must be recirculated through further filtration and purification steps back to the beginning. The recirculating cobalt load would be worth millions of dollars, an expense which without careful management could quickly grow by several hundred percent. In the worst case, cobalt ore, acid and other chemicals could be pored into this plant without obtaining a speck of cobalt, just an ever growing volume of dirty acid with a per cent or two of dissolved cobalt. James consulted on this project, simulating the refinery, and providing means of controlling and minimizing the ‘lost&' cobalt. The simulation considered 170 process flows, each of ten constituents ( acid, cobalt, copper, etc ) through 120 processors of six different kinds. Such a system does not converge in a reasonable time, even on a fast mainframe. For most starting conditions it does not converge at all. James invented a method of approximation and iteration to accelerate convergence. This work was described in Ian Johnstone's paper to APCOM 84.
Assuming that you require stand alone models with a simple text UI, I can offer to provide models at $25 each. Thus my bid of $100 would give you four models.
The attached zip file contains an executable with two simple models, a tank and a tank with spill protection. It also contains the source code that tests the models.
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Attached File
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$100 (USD)
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Apr 2, 2003
9:36:00 AM EDT
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10
(Excellent)
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| Flower: Hydraulic Models
I have added a model of an ideal, zero length, zero friction pipe. Not very useful in the real world, of course, but in my model world it can be used to connect the output from one model to the input of another.
To demonstrate this, I have added a model called ‘ConnectedTanks&', which has the same API as a standalone model, but internally consists of two simple tank models connected by a pipe.
The zip file contains the source code for ‘ConnectedTanks&' to show how easy this is. It also contains the executable which tests all the models and a log file of a run of the ‘ConnectedTanks&' model.
I can provide a program with a text interface to build and run such connected models: $50
A GUI, featuring a simple drawing interface to create the connected model: $200
Individual hydraulic models: $25
James
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Attached File
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$150 (USD)
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Apr 3, 2003
9:23:03 AM EDT
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10
(Excellent)
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| Flowers: Hydraulic modeling
Here is a little application to string together any user specified series of individual hydraulic models and run the resulting simulation.
The bid, $150, would get you 4 individual hydraulic models and a text interface program to connect them and run the simulation. ( Note: the attached is a demo program - for $50 you would get more features. )
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Attached File
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ravenspoint