Search results

You will be dealing with gas flow. The probability is high because of the sharp turns in the assembly choke flow will occur and flow will be limiting. And velocity is part of the heat transfer calculations. Because it works on water does not mean its going to work with R123. You will have a...

K2 is absolutely correct. R123 heat of vaporization is about 70 btu/lb while that of water is 800 btu/lb give depending of course on incoming temperature and pressure. You are getting lots of cooling using water which you will not get with R123. Wall temperatures will sky rocket when you...

I have tried to research where the first angle and third angle view terms were initiated or used. None of the older drawing books use these terms so I suspect they are a result of modern cad techniques because until recently it was difficult to work at different angles. In fact I find the top...

So missing are the hidden lines put them in and you know.

It has always been my philosophy and it is what I was initially taught that a drawing conveys information. What information you present my be dictated by the drawings purpose. Standards exist to help others understand the meaning. However there were times when I made the drawing for myself...

If you want only a heating systems then there are designs that are free from pumps and the need for feedwater systems. They are simple closed hot water systems much like a water heater but the hot water boiler is installed in the basement. Movement is by thermal syphon. I lived in a house...

Ok, I researched locomotive boilers and how superheaters were incorporated to the steam circuit. The larger tubes contain the superheater elements. Also the superheaters are designed to minimize header lengths so in order to do that they are located closer to the steam dome. Also you want the...

Well that pretty well nails it down so it would be valid for 70 years after the authors death. So it be good for another 50 years I would guess.

How long does a copyright last? The term of copyright for a particular work depends on several factors, including whether it has been published, and, if so, the date of first publication. As a general rule, for works created after January 1, 1978, copyright protection lasts for the life of the...

I think it would be wise to stay with one diameter tube for all. The reason is the draft will change because the tube will have different pressure drops for the air flow through them. This may cause the fuel to burn differently depending on where they are located in the tube sheet. And the...

There was originally a radio transmitter called the spark gap transmitter. It is similar in operation to the ignition systems of engines. A DC current is impressed across a coil and broken by a contact breaking the field. The magnetic field of the coil collapses and induces voltage in the...

Orientation does matter because gravity is used in many of them to capture heavy oil droplets. The instructions will identify how they can be mounted. Some may not be sensitive to orientation. Just went through that in another application.

I agree a simple solution is always a good answer. And probably just as accurate given accounting for errors which can occur in gages and instruments.

I read professor Halls paper and found it interesting. He mentioned in the first paragraph the actual fired btu to the drawbar power which is actually a heat rate for power stations. He also quietly mentioned the efficiency was way below the maximum but did not emphasize that. So he obviously...

One of the reasons I start with the carnot cycle its the best you can ever do for efficiency. And all the other factors can be ignored if you know the heat energy going in and the work coming out of the cycle. That is not to say knowing the other factors has no value because you can work to...

There is a technical issue in determining the efficiency of an engine and calculating a horsepower. Horsepower is a defined number. Its a defined by the time rate of doing work. You can have a measured high horsepower and a very lousy efficiency. One horsepower is defined as doing 33,000...

Here is the book I like to use: The ASME Code Simplified Power Boilers Dyer E. Carroll & Dyer Carroll, JR Mc Graw Hill 1997 copywrite Its about 300 pages long maybe an inch thick and about 6 x 8 inches nice size for reference. Has several tables for reference. Its not a substitute for the...

A surface grinder is constructed using precision parts and the wheels are carefully made to ensure accuracy. An angle grinder is for brutal work not precision. If you want novelty go right ahead. If you want accuracy and results do it right. Sometimes you just gotta call things out for what...

Well I am really glad someone has sorted it out. Cause I have seen ash fusion temperatures so variable based on the salts it was running like lava in the hoppers or on the grates. So I did look at the boiler on their website and it would have a snowballs chance in hell on some of the biomass...