KFC, try controlling the pressure on the vapor to make the boiling point 80C. As long as your oven is below 80C, the vapor will condense, releasing heat into the oven. Once the temp reaches 80C, no further condensation will occur, therefore, no further heating. The mass flow of vapor doesn't...
Ditto both replies, and would like to add this: using a threaded tubesheet makes reassembly after pulling the channel more difficult and increases the risk of damaged threads on the tubesheet. Frequently, when the channel is slightly misaligned with the tubesheet, the resolution is to use a...
If the insulation is for heating purposes, use the minimum ambient temp, especially if freezing is a concern. If it is for cooling, use the maximum ambient.
Matt
Quality, quantity, cost. Pick two.
Ok, let's try again:
Your ideal COP (by definition is Qin/W from the enthalpy plot, where Qin is heat absorbed by the fluid and W is the work done to compress the resultant gas, check your thermo textbook) is (from your P/H diagram):
(Point1 - Point4)/(Point2 - Point1)
Reading the chart (I...
COP is defined as the ratio of heat transferred from the system (in for heating, out for refrigeration) to the energy consumed by the device doing the heating or cooling. To answer your concerns:
1. All energy consumption by the unit must be included. If you don't have the controller and fan...
In both cases, I would expect the outlet of the hot side to be less than 46 but more than 43 degrees. However, the B option outlet temp may be higher than the A option because heat transfer is related to fluid velocity due to mixing effects. To maintain fluid velocity (and therefore mixing)...
Is this a new facility, or is it an expansion of an existing facility? Will you have any utilities (steam, heating fluid systems, cooling/chilled water, etc.) available? Are your units in F or C? Sounds a lot like homework, but here are my 2 cents:
As a first pass at this, I would suggest...
I don't think you are reading the chart correctly. Extrapolating (with Excel, using a power function to approximate the trendline) at 625 gpm (the flow through one 6" hose) I get a pressure drop of 13.9 ft of head, or 6.1 PSI, every 1/8 mile (at ~7.1 fps). This adds up to ~223 feet of head...
Try looking up "chemical PRODUCTION engineer" job descriptions. I have held both titles (process and production) but the job was the same.
Matt
Quality, quantity, cost. Pick two.
cvg,
When I reread my post, I realized I didn't make myself clear. The OP should be looking now to transfer with the intent of starting at the new school in the fall term of his junior year, as you pointed out.
Matt
Quality, quantity, cost. Pick two.
Here's my take on it, having done the transfer route and major change (from secondary ed (chemistry) to chemical engineering). If you are going to do it, you should be looking to start NO LATER than the fall term of your junior year. Most engineering courses start their core classes in the...
Ditto to zdas04 comments, but from the undergrad side. I went to Drexel at night for my BS in ChemE, and had the same classes as the regular students. Labs were done on Saturdays. The senior project design courses didn't start until 4PM to accommodate the night students. I was lucky and...
zdas,
LPS for you! This is on the wall in every job I have held:
"A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders...
Eddy,
You answered your question when you quoted OSHA. You are making a change (not replacing in kind) by adding the vent, therefore, a MOC is required. Most companies (at least the ones I have worked for) have their own definition of what requires an MOC - some are more restrictive than, but...
