Recent content by cryotechnic

Thanks, in my formula Ph =(q*rho*g*h)/3.6*10^6 Pshaft = Ph/motorefficiency q = m3/h rho = kg/m3 g = 9,81 h = m "Math is the ruler of your potential succes...."

I have the following situation: 3 coolingwaterpumps, 3 different coolingwater users with gascoolers, coolingwaterpressure reading, coolingwaterflowreading. Can I use the formula as mentioned below for calculation of the pump power? We don't have an accurate powerreading on the pumpmotors, but...

Dear airseperator, Most important thing when shutting down the ASU is to purge the liquid which can contain hydrocarbons. So what we do when we shut down an ASU for a period of time we drain the lox from the main condensor and we drain the enriched air. At an standstill, there will be an...

Thanks for your answer David. Your right, we want to maintain an optimum outlet temperature for the cooled streams, in that way the compressor runs the most efficient. We don't really have a power concern. I mean, not in a way that we we're scared by a suddenly high power bill. Our power bill...

In order to optimize our cooling water system we are investigating the adjustments of cooling water of our turbocompressor gascoolers. The way we adjust the cooling water till now is: Set the total cooling water flow to a point around the value given by the manufacturer. Balans the cooling water...

Thanks to all, in our system we have a sand filter, a partial stream of the cooling water is filtered here. Als we have chemical treatment, anti scaling and chlorination for bio control. From what I've understood from your answers: It's a complex and expensive thing to use the osmosis. Thanks...

Thank you for your help, I will have a look on these sites. Cryo "Math is the ruler of your potential succes...."

I'm working on a review of one of our cooling systems. One of the things is saving on supply water. I’ve been reading about reusing the blow-down water of the cooling tower as supply water. Our system has a blow-down of app. 28 m3/h. In a reusing system, the water is fed through a Reverse...

In our plant we have an Argon purification unit. Crude argon (at about 100mbar) with 2,5% Oxygen is the feed to a waterringpump, then at a pressure of 2,5 bar the crude argon is fed into a DEOXO unit, together with Hydrogen to remove the oxygen from the Argon. From the DEOXO, the gas goes into a...

I mean 0.69 kWh/Nm3 Nm3 = Normal Cubic Meters Cryotechnic "Math is the ruler of your potential succes...."

First, it would have been better to ask this question in the Cryogenic forum here. What do you mean by "similar size to what is used in hospitals"? I'm not sure, but I think for a recent oxygenplant, the specific energy consumption will be around 0,69 kWh/Nm3. Cryotechnic "Math is the ruler...

You're right, the CO2 circle of plants is neutral. What the plants need to grow, will be released later. In old days, the greenhouse owners fired up they're heaters during the summertime to produce they're own CO2 in the greenhouse. So they didn't use it for the heat, but they want the CO2...

In Holland (the Netherlands) there is a very succesfull project like this. They used a large old (not more in use) pipeline that runs from Rotterdam to Amsterdam. This pipeline runs through a very large greenhouse array, and starts close to a oilrefinery. The hydrogenplant (steamreformer) at...

Roughly 1 m3 of liquid gives 800 m3 gas. Greetings Cryo "Math is the ruler of your potential succes...."

In one of our ASU's we have 2 booster/expander combinations in the same air stream. Normally we only have 1 of them in production. We only use both combinations during startup of the plant, or in the case we need much extra liquid. We used to isolate and derime the unused combination. Now, I...