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1. To check the thermal performance of stubby holders, two experiments have been conducted. One is with a Stubby holder and the other is without a Stubby holder. Both experiments have been done after the drink-can has stayed in the fridge overnight with the different temperatures of the fridge which has been set at 0, 5, and 10 degree Celsius. The reason why this has been conducted with different temperatures of the fridge is that there is another student doing an experiment that is similar to my topic. Thus, I was able to run the experiment with 3 different temperatures of the fridge as soon as the drink-can came out of the fridge.
2. 10 pages each for results and discussion section
3. This thesis is mainly on experiments. I have used a few tools to conduct my experiment. I will attach a link to the specification of the tools I have used. The first link is about a Self-adhesive thermocouple that is a pad type. The second link is about waterproof thermocouples. The third one is a Data Acquisition device (DAQ) which is USB-Temp. There are 3 waterproof thermocouples and 1 Self-adhesive thermocouple that will be used.First of all, I removed the top of the drink-can to empty the liquid using a tool known as a can opener. Then, I made a hole on the top of the drink can. After that, I put the chopstick into that hole and reattached this top of the drink-can onto its original place by using Silicone Sealant that is endurable in wet areas.Two waterproof thermocouples that are stuck to the chopstick being made of steel is in the drink can, which are placed in the middle of the drink-can. One is located at the top from the middle of the chopstick and the other is at the bottom from the middle. All thermocouples are attached using electrical tape.
To measure the room temperature, one last waterproof thermocouple is in the air.
A pad type of thermocouple(Self-adhesive) is attached to the middle outside of the drink-can.
These 4 thermocouples will be connected to DAQ devices to collect the data.
4. My supervisor emphasizes on Thermal Stratification that occurs both in drink-can and in air. Also, as I discuss the thermal performance of stubby holders with 3 different temperatures of the fridge, there would be different Rayleigh numbers. Also, There would be a conjugate heat transfer occurring around the drink-can. I want you to write a Processing of data and discussion section in terms of Thermal Stratification, Rayleigh number, and conjugate heat transfer. OF course, other technical terms have to be discussed as well other than those 3. Additionally, there would be a natural convection occurs around the drink-can when it gets wared after it takes out of fridges.
5. About the time the drink can get warmed, we can calculate the theoretical time by using equations 22 and 25 stated in the paper, "Long term behavior of cooling fluid in a vertical cylinder" by Wenxian Lian and Steve Armfield. This paper is in a pdf file attached to this email. Also, you need to find out the time that has been resulted from the experiment. The data from the experiment is Excel files attached to this email. You would be able to find the graphs in each excel file. I would appreciate it if you compare the theoretical time and the experimental time with each other in the result and discussion section. The experiment for the case when the temperature of the fridge is at 10 degree Celsius has not been done yet. It will be done by tomorrow. I will send you tomorrow night for this data. In each excel file, there is a graph showing the graphs of temperature change. The x-axis stands for the time taken. The temperature is shown on the y-axis. There are 4 variables stated in each graph. AI0 is the thermocouple that is located lower part of the chopstick in the drink can. AI1 is the thermocouple that is located at the upper part of the chopstick in the drink can. AI3 is the thermocouple that is attached to the side outside of the drink can. AI4 is the thermocouple that is used to measure the room temperature. Except for the one that is performed without a stubby holder at 5 degree Celsius of the temperature of the fridge (This ran for around 6 hours which is 21753 seconds), The rest three has run for around 11hours which is 40000seconds.
6. Also, could you please name the title of each content in the literature review? Currently, I left them blank like 2.1, 2.2, 2.3, and so on. I will send you the report I have written so far. The name of file for that is “YES”.
7. I need 15 more references. Currently, there are 10 references stated in my current thesis paper. I want it to have at least 25 references.
8. Could you please also tell the expert to discuss why drink-can stays cool longer with a stubby holder compared to the one without a Stubby holder in the discussion section by stating technical terms such as “Thermal stratification, natural convection, conjugate heat transfer, and Rayleigh number”?When they are discussed, the writer should discuss it using the data that are collected from experiment, and theoretical logic.
9. These files have in common which the experiments are done when the temperature of the fridge is set at 10 degree Celsius.These files are named as "With Stubby holder overnight at 10 degree Celsius" and "Without Stubby holder overnight at 10 degree Celsius".Both cases have been performed for around 11 hours which is 40000seconds.I also forgot to mention that the software I used to collect the data is "DAQami". I used 4 channels as I have used 4 thermocouples.The drink I used is a 375mL Standard aluminum can which has a height of 130mm and a body diameter of 66mm.The diameter of the can-end located at the top is 63mm.The name of the drink is KIRKS, PASITO, PASSION FRUIT FLAVOR.
Even the content of drinks is fizzy drinks inside, you can treat them as "water".
10. In order to calculate Rayleigh numbers after looking at the data, 3 variables (Thermal expansion, kinematic viscosity, and thermal diffusivity) are needed to be looked at. Since I am doing 3 big cases (When the temperature of the drink-can starts with 0, 5 and 10 degree Celsius), The Rayleigh number will be different at each temperature. At this time, you need to find out different values of thermal expansion, kinematic viscosity, and thermal diffusivity at each temperature in the discussion section. When comparing with the theoretical value of Rayleigh numbers which are calculated by equation (not from data), however, these 3 variables can be found out when the temperature is at 10 degree which means these variables will be constant. For this case, you have to write in result section.

 

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  • Uploaded By : Brett
  • Posted on : August 19th, 2019

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