How to use liquid nitrogen in S&T heat exchanger 1 - Eng-Tips
2008年10月14日 · We are in the phase of developing some type of process to utilize excess liquid nitrogen to cool utility water. Can liquid nitogen be used to cool water from 110 degF to 41 degF in S&T type Heat Exchanger? Due to very low temperature of N2 i.e. -283degF, water in tubes of exchanger can freeze. Please help how liquid N2 can be utilized to cool ...
Liquid Nitrogen Piping 2 - Eng-Tips
2010年11月16日 · The chamber has refrigeration equipment, but it can't keep up with the rapid ramp times needed for a certain test, hence the liquid N2 boost. iainuts - Thanks; I hadn't even thought of the fact that the pressure buildup from flashing will just push the liquid back into the storage vessel when the valve is opened.
Liquid nitrogen to gas - Energy engineering general discussion
2002年11月12日 · 1 gal of liquid nitrogen = 93.11 cubic feet Q= 1.08 X 93.11 X (319+70) = 39117 Btu/gal of liquid or Btu/ 93.11 cfm of gas Latent heat of vaporization 86.6 Btu/lb = 583.5 Btu/gal Total: 39700 Btu/gal According to Quark it suppose to be 182.72 Btu/lbm X 6.7347 = 1230.6 Btu/gal I made a mistake somewhere, I think in the formula….
Can use the liquid nitrogen for heat exchanger 2 - Eng-Tips
2008年7月9日 · 4. when the liquid nitrogen changed to gas phase, we will receive gas volume into the nitrogen surge tank. 5. we hope to cooling the hot flow from 50 to 30~35 degree C, then we can receive all liquid hydrocarbon into receiver. 6. Suppose that liquid nitrogen will be changed to gas and the temp of outlet is around 5~10 degree C. 7.
Liquid Nitrogen store ventilation - HVAC/R engineering | Eng-Tips
2004年12月14日 · First thing is to check for existence of local codes. Nitrogen asphyxiation is very dangerous and it causes fatality, sometimes, without indication. You should check with Dewar manufacturers about liquid N[sub]2[/sub]evaporation rates. 1 liter of liquid N[sub]2[/sub] evaporates into 24.6 ft[sup]3[/sup] of gas.
Liquid nitrogen piping - Material engineering general discussion
2003年12月22日 · If the liquid nitrogen (LIN) is used for it's refrigeration value, then yes, generally the line is insulated. If it isn't then there's little need except as you say for personnel protection. If the LIN is used for refrigeration and the pipe is to be uninsulated, I'd suggest doing a thermal analysis using a coefficient of heat transfer of ...
Liquid Nitrogen Vaporizer Design 1 - Eng-Tips
2017年8月12日 · I'll be using fin tubes, on the input I have liquid nitrogen at -196°C and on the output I want gaseous nitrogen somewhere between 10 to 20°C. The mass flow is known as it is pumped by a cryogenic pump, and the pressure on the output side is going to range from 0 to 220 bar as it is used for cylinder filling.
Requirements for off-loading of flammable fluids from tanker …
2007年10月1日 · Nitrogen pad on top of the tanker is a good idea. You should be adding nitrogen to the headspace of the tank if you are not vapor balancing with the tank. 4" hose, Boy is that heavy. Offloading rate is driven by your pumps, unless you are pressuring off the tanker.
Flow Of Nitrogen Through A Utility Hose? - Eng-Tips
2003年7月14日 · Does anyone have a rule of thumb or an estimate of the flowrate of 70 psig N2 through about 100' of 3/4" utility hose? The hose/hoses will be connected to an empty reaction train sitting at 3-5 psig. I want to purge the reaction train to the flare to remove residual hydrocarbon, and I...
High Pressure Nitrogen - Laser engineering - Eng-Tips
2017年2月14日 · 4. you need to take liquid from the dewar, not gas. Run the liquid into an evaporator. Don't size the evaporator for your worst case cut scenario, size it for your worst case failure scenario. If an N2 leak develops you can draw a lot more than what a specific nozzle size and specific pressure will draw.