Carbon dioxide mixed with air as a refrigerant medium
Thread Content
The glass is heated in an electric furnace to 600 to 700 degrees Celsius, at which point it softens; after being taken out of the furnace and shaped in a mold, it needs to be cooled using a large flow of air in order to be tempered. However, the fans that supply the cooling medium air are all high-power right-handed volute centrifugal fans, generally with a capacity of over 280 kW, and several of them are used simultaneously. This represents a significant expense for a company’s electricity consumption costs. Moreover, the fans generate extremely loud noise when operating and as air passes through the pipes, resulting in a very poor working environment on site. It has been wondered whether it is possible to improve the quality of the cooling medium, air, thereby reducing reliance on air flow pressure and achieving energy savings and noise reduction If low-temperature gases such as carbon dioxide are mixed with air? Equipment
For this kind of problem, thinking about it is useless; calculation is what’s needed. Several cooling methods used by manufacturers: air cooling, circulating water cooling, chilled water cooling using refrigerators, and liquid ammonia cycle cooling. Which of these refrigerants can come into direct contact with glass? How is low-temperature carbon dioxide obtained – by using dry ice? It is necessary to calculate the unit price of dry ice, its heat of vaporization, thermal conductivity, etc
Energy savings can be achieved through the use of efficient fans. The high-pressure fans we supply to Grasstone have motors that are one to two sizes smaller than those of domestic fans, resulting in a noise level that is 5–8 decibels lower. Your thinking is also good; by reducing the inlet temperature, the flow rate and pressure will decrease. With a lower flow rate, the velocity drops as well, and thus the noise level decreases naturally
I can work with you on this project. At that time, I will provide a few pictures and requirements to enhance your sensory experience. The electricity saved in this way will be a truly remarkable achievement
I have considered all of these. At present, only clean, dry, and cold gas can be used to purge the upper and lower surfaces of the contact glass. Other cooling methods, including liquid cooling, require excessive investment in equipment; it’s unthinkable to consider them
Dry ice can be vaporized and mixed with normal air. The key is how to mix it. Our existing air ducts have a diameter of one meter; the medium passes through evenly arranged ducts, air grills, or air knives before reaching the glass
Send me your company name along with the contact person and contact information. Thank you
Send me your company name along with the contact person and contact information. Thank you
Send me your company name along with the contact person and contact information. Thank you
This post was last edited by CHANGBAISHI on 2021-1-25 at 17:21. There are several issues worth noting. 1. Is it true that the greater the air volume, the better? 2. Is it true that the lower the temperature, the better? 3. If energy savings and noise reduction are to be achieved while maintaining the aforementioned two process parameters unchanged, what aspects need to be considered? I believe that since the aforementioned flow rate and temperature need to maintain the existing parameters, and all the gas exiting the fan is utilized without any leakage, the current process should be maintained. Technological upgrades are something that everyone is considering at this stage. However, there are far too many cases of taking things out of context on the production line. Just as the process conditions cannot be changed, for the purpose of technical upgrades, it can be proposed to install variable frequency drives on the fans to save energy; by providing all relevant data, a mediocre manager sees an opportunity to achieve results and approves the project without hesitation. As a result, production is at full capacity, so this thing is useless. But if the production process conditions can be changed, I think for such a simple process, the original designers wouldn’t be that foolish as to leave the process modifications to the enterprises to handle. Technical upgrades are acceptable, but they must not be done without considering the requirements of the production process. Increasing pressure and lowering temperature both require external energy; a comprehensive evaluation is necessary, and it’s not possible to make advanced modifications by taking things out of context. With all due respect, for your reference. Oh, there are still some changes needed regarding the noise reduction issue. It would be best to send a photo of the site to see if soundproofing enclosures or something similar can be installed.
There’s no need to think about dry ice; this is why one shouldn’t eat minced meat. Dry ice is definitely much more expensive than free cold air; after all, air cooling only requires electricity. Heat recovery can be considered to generate some power back, or a small heat pump can be used to cool the incoming air and save some electricity