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iRubric: UNIFAC multiple flash separators rubric

iRubric: UNIFAC multiple flash separators rubric

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UNIFAC multiple flash separators 
Concentrate a compound trough multiple flash separation units using a worksheet for UNIFAC model for non idealities in the liquid phase.
Rubric Code: AX945BX
By tebbiechale
Ready to use
Public Rubric
Subject: Engineering  
Type: Project  
Grade Levels: Undergraduate

Powered by iRubric Evaluation Guidelines
Results and logic
  Below the standard

1 pts

Processing the standard

2 pts

Complies with the Standard

3 pts

Exceeds the Standard

4 pts

Results
25 %

In Overall Students are able to solve the problem logically
Below the standard

Students were not able to solve the problem correctly. Errors indicate severe weaknesses regarding VLE concepts, and might or not include weaknesses in other areas of knowledge
Processing the standard

Students were not able to solve the problem correctly. Errors were evident. Weaknesses in other areas of knowledge are evident.
Complies with the Standard

Students are able to solve the problem correctly. The tought process is evident, and might not be always logical demonstrating somewhat the aquisition of knowledge regarding VLE concepts
Exceeds the Standard

Students are able to solve the problem in a correct manner. The tought process is evident and logical. Students demonstrate aquisition of the VLE concepts.
Calculations
20 %

Students are able to perform calculations in VLE in more than one stage
Below the standard

Students are not able to perform simple separation calculations for a single stage, demonstrating lack of knowledge in the dependancy of the variables.
Processing the standard

Students are able to perform VLE calculations in a single stage. or they may not be able to define operation conditions, feed, products, or V/F relation, or all applicable calculations
Complies with the Standard

Students are able to perform VLE calculations in most stages. They are able to define operation conditions, feed, and products, V/F relation, and all applicable calculations
Exceeds the Standard

Students are able to perform VLE calculations in all stages. They are able to define operation conditions, feed, and products, V/F relation, and all applicable calculations
Logic
15 %

Students are able to logically define operation conditions for a stage separation
Below the standard

Students perform calculations without respect to the relationship between variables in order to arrive to a result. they base their calculations on the previously designed graphics only.
Processing the standard

Students are limited to the use of T and P values used in the previous workshop. Its apparent that knowledge is limited and resort to only using a PXY diagrams
Complies with the Standard

Students are able to define correctly which and how many parameters are adequate for a separation stage, but definition of values seems to be based on the ocurrence of an adecuate result, more than a thoughtout process
Exceeds the Standard

Students are able to define correctly which and how many parameters are adecuate for a separation stage, and values used are the result of understanding VLE concepts
previous knowledge
10 %

ability to apply mathematical and chemical knowledge from previous courses
Below the standard

Students did not consider mass percentages in any of their calculations. did not calculate all molar and mass flows
Processing the standard

Students did not consider the mass percentage in one of the calculations. did not calculate all molar and mass flows
Complies with the Standard

Students were able to identify the difference between working in a mass or a molar base. and performed calculations adequately. calculated most of molar and mass flows
Exceeds the Standard

Students reached the exact 90% mass concentration, with appropriate calculations demonstrating the aquisiition of mathematical and chemical knowledge. calculated all molar and mass flows.
Process Diagram
5 %

Student comply with restrictions and elaborates a
Below the standard

students did not comply with restrictions or process diagram not elaborated correctly
Processing the standard

students complied with some restrictions but modified only slightly the values of temperature or pressure without VLE considerations. or. Process diagrama incomplete
Complies with the Standard

students complied with T and P restrictions and some logic was applied to the considerations of T and P. and mostly complete process diagram
Exceeds the Standard

Students respected restrictions and applied valid logic to the T and P considerations. and complete process diagram
Attention to detail
10 %

Precision in the results given
Below the standard

Students have erroneus results, or imprecisions result in very divergent results.
Processing the standard

Students did not worry about delivering precise results
Complies with the Standard

students sometimes gave approximate results
Exceeds the Standard

students demonstrate atention to detail in giving correct answers
process improvement
15 %

students make the effort to design a more efficient process
Below the standard

student do not show a thoughtout improvement process
Processing the standard

students make an effort to explain what would be done to improve the process without calculating the process
Complies with the Standard

students make an effort at process improvement and make some calculations, achieve a slight improvement
Exceeds the Standard

students show an improved designed process and discuss the impact of solutions proposed.




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