Spreadsheet coursework – GradSchoolPapers.com
MASS BALANCE Question 6 In a casein plant the entering coagulum containing casein and lactose is passed through two cookers and acidified to remove the casein. The curd is removed from the whey by screening and then washed and dried. The casein fines are removed from the whey and the wash water by hydrocyclones and mixed with the heated coagulum just before the screen. The whey is used for heating the first cooker and steam for the second by indirect methods. Some of the more accessible streams have been sampled and analysed for casein and lactose; the remainder of the steam can be assumed to be water without significantly effecting the results. In addition the moisture content of the final dried product has been determined. % Composition on a weight bases Casein Lactose Moisture Coagulum 2.76 3.68 Whey (raw) 0.012 4.1 Whey (cyclone) 0.007 4.1 Wash water 0.026 0.8 Waste wash water 0.008 0.8 Dried product 11.9 From this data calculate a complete mass balance for the process using simple step by step approach, starting with the hydrocylones. Assume that the lactose is completely soluble in all streams and concentrations are the same. a. Draw up and fill in the following table (27 marks) Mass Flow Kgh-1 Casein Lactose Total Coagulum + Fines mixed Mixed fines Dewheyed curd Raw whey Whey fines stream Waste wash water Wash water fines Pressed curd Dried Product b. What % of the casein going into the screen is recovered fines? (3 marks) c. What % recovery efficiencies do the two sets of hydro-cyclones display? (3 marks) d. What are the % compositions of the pressed curd and the dried product? (3 marks) – GradSchoolPapers.com
July 2, 2021Tok Final Essay – GradSchoolPapers.com
July 2, 2021Spreadsheet coursework – GradSchoolPapers.com
Spreadsheet coursework
Order Description
Spreadsheet assignment
You are to draw up a specification and house style and then design, build and test a spreadsheet for the task described below:
Task:
A comparison website, wishes to have an excel spreadsheet which can be down-loaded from their website which will provide advice as to best mobile phone deals
available. The primary purpose system is to allow comparisons of monthly contracts with each other. The spreadsheet should consider
1. The length of the contract
2. The users pattern of usage
3. The monthly cost
Your system should have a graphical display of the different contacts usage against that included in the contract.
In considering your design, you should note:
The tariffs suitable for customers will vary depending on their use of call time, text messages and data services.
The data on currently available tariffs will need to be able to be updated. The final format for tariff data has not been decided so you should suggest an appropriate
one, and provide example data that demonstrates that your spreadsheet will be able to be updated as required (note the data you use should be realistic but does not
need to be the current data for genuine providers).
You should hand in:
1. Your system as an excel file (*.xlsm)
2. Your printout of a word document including:
a. Your specification of the system (including example customer data and tariff data).
b. Your house style (which should be informed by Tufte’s principles of Graphical Integrity and excellence.)
c. A test schedule.
d. Some detailed test results which should demonstrate the system at least works correctly on the example data (from 1 above)
Your system should demonstrate the following:
1. At least one fully working UserForm
2. Use of cell protection, data validation and conditional formatting.
3. Clear documentation of VBA code
4. Clear and uncluttered layout demonstrating graphical excellence.
5. Appropriate error messages
6. Ability to update the tariff data.
7. Good use of Excels Charts and built-in formula
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