If we count other nations - there was recently a disaster in South Korea which was reportedly the result of a double-engine bird strike. Sadly 179 people killed in one event.
I am setting up a circuit for reading a 10k type 3 thermistor (10kohms). I have an MPC3008 ADC I will be interfacing with an AVR/Atmega644P microcontroller. Why does Microchip recommend higher clock speeds for higher Vdd? I came to believe higher operating voltage allows higher ADC clock speed...
There is a control valve but I am controlling it and it stays wide open.
The thing that really bugged me was that the pressure differential reading would stay the same for at least several minutes after I turned the pump off. I did zero the transmitters at atmospheric pressure before filling...
Just an update -
My two pressure transmitters seem to return nonsense readings that are unusable for determining flow. With pump at either 15% or 95% speed, the pressure differential reading is nearly identical, even though It seems apparent there is much more flow. I did my best to clear air...
Just an update,
the two pressure transmitters seem to return nonsense readings that are unusable for determining flow. With pump at either 15% or 95% speed, the pressure differential reading is nearly identical, even though It seems apparent there is much more flow. I did my best to clear air...
I meant if I want to use the manufacturer Head loss vs GPM data (which was apparently in the table I was reading all along). Your point is taken, though.
My coil is 3/8" tube, but I am connecting with 1/2". To accurately measure pressure drop across the coil, I assume I will need to connect my transducer directly to 3/8" tube to get accurate pressure drop across the coil itself and not also be measuring the reducer etc?
I am currently reading Chapter 6, Fluid Flow in Piping, of "Modern Hydronic Heating and Cooling" by John Siegenthaler, P.E.
I noticed the Titus coil performance table provides a loss of head per GPM through the coil instead of loss of pressure. This is interesting as the book explains viscous...
Doh! I looked right at it and didn't catch that. Thank you.
I am still interested in learning if there is some mathematical/geometrical method for the sake of learning. Will look into the Crane TP410 referenced above.
Is the increased heat transfer of higher velocity flow the result of:
1) Increased turbulence and the resulting improved heat exchanger surface contact of a given mass of water as it travels through the heat exchanger
2) Is there a higher average fluid temperature within the coil which is a...
I have a Titus DESV-06 with a single-row heating water coil and would like to be able to calculate flow rate in real time using information supplied by two Dwyer pressure transducers (one at inlet, one at outlet). I was not able to locate a manufacturer table. I will attempt to get the...
I just meant pressure drop across coil, measured via inlet and outlet of coil.
What could you change to increase pressure drop besides flow rate? Meaning, if I double my pump speed I assume that would increase pressure drop at coil (and of course would also increase flow). What about the coil...
According to the spec sheet for the coil:
2gpm, 200cfm and water/air temperature difference of 70* should be about 4,760Btu/hr.
Given that the water heater is 1440W at a claimed efficiency of 98%, I am expecting it to be able to handle about 4800Btu. I have no idea if this will turn out to be...
Awesome, thank you. So the total pressure drop will be pressure drop will be the drop across a 8" - 6" reducer and short pieces of round duct, plus (If I read the Titus document correctly) somewhere between 0.07 - 0.13" WC across the box with damper full open, plus between 0.04 - 0.15" WC...
