SCAVENGER HUNT 3 (28 October - 10 November)

Dear colleagues,

Thanks for all your efforts for hunting down different ways of heat transfer from our daily life. We have seen creative photographs from hotel rooms, BBQ, freeze-drying, landscape, hair-drying at home, and preparing meal at home. 

The third Scavenger Hunt will be examples of a "thermometer used as a monitoring device". Again please find examples of thermometers used outside the scope of pharmaceutical cold chain. 

Looking forward to see your photographs. When you post your photograph(s), please do not forget to explain where you took the photograph and give some background on the picture taking. Please use all your creativity in hunting interesting shots.

PREPARING MY AFTERNOON MEAL (Edwin)

Boiling slices of Yam and Plantain in an aluminum cooking pot; using heat transferred through conduction……… to the mass motion of warm water generated as a result of convection current transferring energy. Thermal radiation felt when taking the snaps

One of the most beautiful end products that can be linked to the FIRST LAW OF THERMODYNAMICS

CONDUCTION VERSUS CONVECTION (JACQUI)

I am stuck at home for a few days due to an L4 -5 misalignment….so my great plan of getting a picture of my 4 year old niece Rebecca making her super cute ‘sad face’ over her melting ice cream cone is not going to happen….that would have been a lovely picture as she never fails to do this, she always insists on 3 ice cream scoops and she can never eat it fast enough so invariably sun radiation and a little conduction results in the famous pout and icecream over the floor. LOL

So I needed to improvise …this gives me the opportunity of sharing a secret about type 3b hair with you…patience please! the rule is..... AS MUCH AS POSSIBLE…STICK TO AIR DRYING 3B HAIR.

I explain….

When dried naturally by conduction…which can take anything between 2 to 5 hours depending on how hot the weather is the result …nicely well behaved coif above.

However when the drying process is accelerated by assisted convection drying using a hair dryer with a diffuser …the results are sooo different! See below!

You are permitted to laugh  everyone. Take care.

Three ways of heat transfer in one photograph (ROLAND)

The following contribution comes from ROLAND.

This is a  view of the interior of the chamber of a freeze dryer where the lyophilization process take place. these are vials with a pharmaceutical product during the ramp of freezing.In this example the three mechanism of heat transfer are involved.

Conduction: From the product to the vials and  then to the shelf in direct contact to the vials.  Higher heat transfer rate.

Convection: From the product to the shelf surface through the air occluded between the shelf surface and the bottom of the vial in the case of concave vials. Lower heat transfer rate.

Radiation: This mechanism is more significant during primary drying of the lyophilization process than the freezing step, because exist a major gradient of temperature between  the surface of the shelf above the vials, walls, front door and the product surface. The product placed at the edge of the shelves have a higher heat transfer coefficient than the center ones. 

Heat Transfer - IGNACIO

The below 2 photographs are from IGNACIO. 

Scavenger Hunt 2 andrey

Radiation:

This IR lamps was hunted in the bathroom of hotel

Convection:

Fan was found in the same place

And finally Conduction tool is well known :)

Transfer Heat (outside the scope of pharmaceutical cold chain)

Hello everybody, we just celebrated the last days "Edhha  Aid" during this Party , we slaughtered a sheep, we got family and friends and I have prepared several traditional recipes.

Today is my last day off, I'm tired and I did not want to cook. I just prepared these good kebabs. I started preparing barbecue grill with charcoal.

With the Grilling, We Have amount of live radiant heat, for cooking meat and vegetables very quickly, the Heat transfer to the food is done via thermal radiation and direct conduction.

Essentially, the meal was quickly prepared, and I had a little more time to clean my house, to answer assignment step 8 and get some rest.