Create a model for the system below, which is a 10 ft x 10 ft x...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Create a model for the system below, which is a 10 ft x 10 ft x 1ft "slice" of a cleanroom, that gives the particle count in any 1 ft' unit in the volume (all other slices in the room are numerically identical to this so they can be ignored in this analysis). Assume that air only flows sideways when it is forced to do so by the equipment (dark gray) but ignore the effect of people on airflow. For recirculation purposes, all the air in Zone 1 (light gray) is recirculated whereas the portion of air recirculated in Zone 2 (light blue) depends on the flow rate into this zone and the exhaust flow rate. Make-up filters HEPA/final filters Note that the number of particles penetrating the final filters in each column for these input parameters is around 2.8/min - your model should also give this value (a more exact value is 2.812844707, which is much more precision than you would ever need but it will help you to determine if your model is working!). Since none of the counts in this volume exceeds 100 particles/ft of 0.5 m diameter, this could be a Class 100 environment under Fed. Std. 209E. Now consider the following scenarios: Case 1. (For all sections of the class.) Better cleanroom garments, materials, and operating practices lead to smaller generation rates inside the room, to give the particle generation map below. Note that the flow rates and final filter efficiency have also been altered. 1 0 0 0 0 0 0 0 0 1 Final filter flow rate = 120 cfm/column Recirc filters Zone not influenced by exhaust Exhaust flow rate 150 cfm 2 Zone influenced by exhaust Make-up filter efficiency = 99.9% 1 0 0 0 0 0 0 0 0 1 1000000002 1000000025 Recirc filter efficiency = 99.9% Final filter efficiency = 99.997% 1 Equipment External particle density = 7.5 x 105/ft Generation rate (per min) of 0.5 m particles in each ft: 200 200 00002 5 2 10 40 10 0 10 150 5 10 20 30 20 10 20 30 20 100 1 Create a place for your inputs 7.300 100 1 100 1 100 1 100 1 100 100 200 Exh 3 3 Exhaust XXX Calculated 125 Exh 300 300 300 2 20 30 20 20 20 30 30 40 30 30 30 30 50 80 50 50 80 50 Show the particle counts in the volume. What class under Fed. Std. 209E would this room attain? Enter particle generation rates in each location 5000000005 5000000005 5000000005 500000002030 10002000000 20 50 Calculate G, R, R, G+ for each zone separately! 3 Penetration through final filters into each column = 2.8 Calculate total number of 7.8 particles entering the cleanroom 12.8 (zone) from all sources Calculate the cumulative number of particles per minute entering each location 17.8 Tidying-up, we get the number per minute entering the region G.[1+R,/(1-R,)] 22.8 where 20 150 250 150 50 50 1500 50 150 500 150 500 100 300 250 250 500 This number-G = number of particles/min entering the room through the final filters (28.12844707/10) 150 150 150 150 150 150 150 250 150 500 750 500 300 750 300 Create the "grid" Determine "velocity Calculate velocities multipliers" based on input Calculate the count in each location C R=1 GRh/u Create a model for the system below, which is a 10 ft x 10 ft x 1ft "slice" of a cleanroom, that gives the particle count in any 1 ft' unit in the volume (all other slices in the room are numerically identical to this so they can be ignored in this analysis). Assume that air only flows sideways when it is forced to do so by the equipment (dark gray) but ignore the effect of people on airflow. For recirculation purposes, all the air in Zone 1 (light gray) is recirculated whereas the portion of air recirculated in Zone 2 (light blue) depends on the flow rate into this zone and the exhaust flow rate. Make-up filters HEPA/final filters Note that the number of particles penetrating the final filters in each column for these input parameters is around 2.8/min - your model should also give this value (a more exact value is 2.812844707, which is much more precision than you would ever need but it will help you to determine if your model is working!). Since none of the counts in this volume exceeds 100 particles/ft of 0.5 m diameter, this could be a Class 100 environment under Fed. Std. 209E. Now consider the following scenarios: Case 1. (For all sections of the class.) Better cleanroom garments, materials, and operating practices lead to smaller generation rates inside the room, to give the particle generation map below. Note that the flow rates and final filter efficiency have also been altered. 1 0 0 0 0 0 0 0 0 1 Final filter flow rate = 120 cfm/column Recirc filters Zone not influenced by exhaust Exhaust flow rate 150 cfm 2 Zone influenced by exhaust Make-up filter efficiency = 99.9% 1 0 0 0 0 0 0 0 0 1 1000000002 1000000025 Recirc filter efficiency = 99.9% Final filter efficiency = 99.997% 1 Equipment External particle density = 7.5 x 105/ft Generation rate (per min) of 0.5 m particles in each ft: 200 200 00002 5 2 10 40 10 0 10 150 5 10 20 30 20 10 20 30 20 100 1 Create a place for your inputs 7.300 100 1 100 1 100 1 100 1 100 100 200 Exh 3 3 Exhaust XXX Calculated 125 Exh 300 300 300 2 20 30 20 20 20 30 30 40 30 30 30 30 50 80 50 50 80 50 Show the particle counts in the volume. What class under Fed. Std. 209E would this room attain? Enter particle generation rates in each location 5000000005 5000000005 5000000005 500000002030 10002000000 20 50 Calculate G, R, R, G+ for each zone separately! 3 Penetration through final filters into each column = 2.8 Calculate total number of 7.8 particles entering the cleanroom 12.8 (zone) from all sources Calculate the cumulative number of particles per minute entering each location 17.8 Tidying-up, we get the number per minute entering the region G.[1+R,/(1-R,)] 22.8 where 20 150 250 150 50 50 1500 50 150 500 150 500 100 300 250 250 500 This number-G = number of particles/min entering the room through the final filters (28.12844707/10) 150 150 150 150 150 150 150 250 150 500 750 500 300 750 300 Create the "grid" Determine "velocity Calculate velocities multipliers" based on input Calculate the count in each location C R=1 GRh/u
Expert Answer:
Related Book For
Posted Date:
Students also viewed these electrical engineering questions
-
Python and most Python libraries are free to download or use, though many users use Python through a paid service. Paid services help IT organizations manage the risks associated with the use of...
-
Priority reversal can happen when strings of varying needs synchronize on admittance to normal assets - strings of more prominent need might wind up looking out for strings of lesser need, prompting...
-
Bank Teller Staffing Plan As the teller supervisor at Montana Federal Credit Union you are responsible for developing a staffing plan for tellers that meets customer needs, satisfies the union...
-
Determine the air-fuel ratio on a mass basis for the complete combustion of octane, C8H18, with (a) The theoretical amount of air. (b) What-if Scenario: What would the theoretical amount of air be if...
-
Find the equation of the line through (-1,-2) which is perpendicular to the line y = 9. Give your answer in the form y = mx + b. Provide your answer below:
-
Explain why it is important to report communicable diseases, adverse drug reactions, and infectious diseases.
-
Phap Company uses a standard cost accounting system. During January, the company reported the following manufacturing variances. In addition, 8,000 units of product were sold at $8.00 per unit. Each...
-
In an initial discussion forum post, describe the key elements of channel design and business service marketing. Next, explain why it is important for a marketing manager to understand business...
-
Research the country of Mexico and answer the questions below in depth. . Discuss the standard of living (What do the people own? How does the standard of living compare to the U.S.? Ideally, this...
-
This assignment is to create ROM that at a minimum includes: Project Vision Problem Statement Team-resources consulted Recommendation and approach Dependencies Implementation Timeline Estimated...
-
How does Vistera use ML/AI to improve brick-and-mortar retail using image stockouts recognition technology and automated visual analytics. a. Discuss Vistera's ML/AI process or factory b. How do...
-
Electric vehicles are rising in popularity and interest across various international markets. Automobiles, motorcycles, pickup-trucks, bicycles, skateboards, hover-boards, and yes, even surf-boards...
-
Please review the questions and answer according to what we have discussed in class . Q1: What is Compliance?. Marks (5) Q2: What are possible business reasons for developing compliance program?...
-
Effective communication strategy is essential to achieving effective project integration management. Any time the goal is to integrate numerous concurrently operating activities, the role of...
-
How should BellSouth, AES, and other companies address concerns about government policies in Brazil?
-
Write a declaration for each of the following: a. A line that extends from point (60, 100) to point (30, 90) b. A rectangle that is 20 pixels wide, 100 pixels high, and has its upper-left corner at...
-
The overall process of creating a capital budget proposal has a lot of similarities to writing a business plan for a start-up company. Describe three aspects of the similarities between a budget...
-
There are three general categories of capital budget scenarios: replacement, expansion, and investment in a NewCo. Describe the overall decision-making context for each. How do they draw on similar...
-
In analysis, some focus seems to be on the need for NPV equations to be applied to projects that are mutually exclusive. But in practice we find that the lines are blurred in capital budgeting....
Study smarter with the SolutionInn App