We are considering vapor recompression to upgrade the heat quality of a waste vapor stream so that it would be easier to integrate with existing proceses for heat recovery. I am looking for information on pros and cons of this as well as what issues may prevent this technology from being...
I am working to justify repairing steam leaks in the plant. Can anyone help me with a calculation method or table to determine the rate of steam loss through leaks to atmosphere? Would RO calculations be sufficient? I think it would be easier with a table using plume size and steam pressure...
I am considering funding a pinch study in my chemical operations. I've got a $300 million/year energy bill (steam, gas, coal, KWH, etc)Does anyone have experience with this? What were the outcomes? Did projects get installed as a result?
Great responses from everyone. Special thanks to rmw. We contacted some HVAC folks about what they use to clean their condensers. They put us in contact with a vendor that came in to evaluate our system. The vendor had never done anything of this magnitude, but we decided to give it a shot...
Agreed 100%. The ops teams are programmed to do what it takes to safely get pounds out the door. This was their solution. A short term fix to sacrifice longer term viability.
We have several banks of Air Cooled Heat Exchangers (FinFans). They are used to control the temperature of a closed loop tempered water system. They are designed for 11MMBTU heat removal per bank. They've been in service for over 20 years. They are installed approximately 15 feet above grade...
All points well made. Another thing you could do...there are many companies out there that can perform external scans over the length of your column. They can map out tray by tray characteristics over the column.
I have a relatively small column with 10 bubble cap trays. It is in a dirty service with approximately 1% phenolic tars. Feed is 96% toluene and ~2% each of water and methanol. Feed enters on top tray and there is no reflux. Solvent and tars are the bottoms. Over time the bubble caps get...
You have changed the system curve significantly. You may have gone far enough back on your pump curve to have reduced flow to your remaining online system.
You had a total water flow = flow to circuit one + flow to circuit two. Now you are taking flow to circuit two out of the system. Not...
We have a DEKA air preheater on a 115MM BTU fired heater. We clean with a water flush on a monthly basis. We have installed spray rails across the top of the unit. We drain the unit to a sump where the water is collected. The unit is bypassed during cleaning.
Does anybody have a quick and dirty method for estimating energy losses due to poor condition or lack of insulation? I have varying line sizes and varying process fluid temperatures. Thanks
