User:MurphyTC/ENES-100/project 2

My Instructor's user page which points to this.

My Tasks

Find measurement for the air nozzle on the blood cooler

Find matching air hose

Progress

Find measurement

The size measured in at about a quarter inch, literally the same size as what was used for the turbine project.

Find air hose

Quarter inch air hose

Proposed Next Steps


 * Get air hose ordered
 * Begin coming up with ideas for fixing leak
 * Begin coming up with ideas for solving the "thin arms" problem in vacuum section of blood cooler

My Tasks

Take a picture of the current Blood Cooler model

Compose ideas for fixing leaks

Progress Picture

A picture of the current model is shown to the right.

Leak fix ideas

A sketch made in Microsoft Paint (shown below) depicts a redesign that could fix the issue with leaking. At the most basic level, the water container is made of weak plastic, and should be replaced by PVC pipe.

Proposed Next Steps


 * Look for PVC pipe online
 * Refine sketch into better (more accurate) design

My Tasks

Find the heat energy of the average human body

Find core temperature of average human when they're overheating

Compare the differences of the heat produced by someone whose in shape versus out of shape.

Progress

Heat of average human

| This wiki page on Thermoregulation states that the average human body produces anywhere between 70-870 watts of power, depending on the amount of physical activity they've committed to.

Heat of average human when overheating

The average human who is over-heating is likely to be on the larger end of the scale. With a minimum of 70 watts, and a maximum of 870 watts, the blood cooler would have to take up to 800 watts of power. Given that not every person would be working up to the maximum threshold of 870 watts, the equation would be (870-n)-70 = X. With "n" being anywhere from 0-699, and X being the amount of heat energy the blood cooler needs to extract.

Comparison of heat of in shape person versus out of shape person

| This article describes how much a fit person sweats compared to an unfit person. It turns out, whether or not one is fit is absolutely trivial. It depends on how much physical work one does, and how large they are. Seeing as one sweats when their body is trying to cool down, this information helps answer the question "What is the difference of heat energy of a fit person versus an unfit person?"

This is the answer: The heat energy a person generates depends on the quality and quantity of their work, not the quality nor quantity of their body. Therefore, there is no difference of heat energy between fit and unfit people.

Proposed Next Steps


 * Figure out method of cooling water so it can cool the blood by anything up to 800 watts of energy
 * Create "belt" prototype for sealing the blood cooler vacuum

My Tasks

Search for potential materials to use for the "belt" model of the Blood Cooler vacuum component

Begin constructing "belt/sleeve" model of the vacuum

Revise "belt/sleeve" design as necessary

Progress

Search for materials

The materials used for the prototype were a rubber swimming cap (for the air-tight "sleeve") and a ring belt (to tighten the sleeve)

Before the swimming cap was procured, | this rubber sheet was found online, and is a likely candidate for use if the swimming cap does not provide useful.

belt design prototype The image shown right depicts that the rubber cap holds up well as an airtight seal. However, as the image shows, the seal was that of a hand tightening the cap, not the ring belt. This is either due to the fact the belt does not conform well to a person's arm, or perhaps there was not enough material (the swimming cap) for it firmly work.

Re-design

The next design may include the rubber material in the link above, zip-ties, additional belts, thing rope, and/or the concept of a "wrap" around the arm using the sleeve.

Proposed Next Steps


 * Order rubber sheet
 * Draft more designs for the vacuum
 * Find more suitable air pump
 * Build water tank