Global Heat Transfer’s Post

In any process that requires indirect heat transfer, it's essential to select the appropriate thermal fluid for the application - whether its for heating processes in power generation, or cooling products in food processing. With so many heat transfer fluids on the market, a question our team are often asked is "What thermal fluid is best for my application?" Well, in this blog post, we explore mineral and synthetic heat transfer fluids and how to choose which is best for your process. Key points to consider are: ✅Operating temperature ✅Operating range ✅Chemical composition ✅Maintenance techniques Read our blog post: https://zurl.co/etjt For more information on choosing the best fluid for your application, contact a member of the team today. Telephone: +44 (0) 1785 760555 | Email: enquiries@globalhtf.com #ThermalFluid #Engineering #Manufacturing #ght #htf

In any process that requires indirect heat transfer, it's essential to select the appropriate thermal fluid for the application - whether its for heating processes in power generation, or cooling products in food processing. With so many heat transfer fluids on the market, a question our team are often asked is "What thermal fluid is best for my application?" Well, in this blog post, we explore mineral and synthetic heat transfer fluids and how to choose which is best for your process. Key points to consider are: ✅Operating temperature ✅Operating range ✅Chemical composition ✅Maintenance techniques Read our blog post: https://zurl.co/etjt For more information on choosing the best fluid for your application, contact a member of the team today. Telephone: +44 (0) 1785 760555 | Email: enquiries@globalhtf.com #ThermalFluid #Engineering #Manufacturing #ght #htf

#overall #heattransfer #coefficient #steamheating #hfo #tankcoils #pourpoint #chemicalengineer Dear Chemical Engineers, In the chemical process industry there are many applications involving heating of high viscosity liquids stored in tanks to make them easily pumpable and flowable, essentially keep them above their pour point. Some of the most common applications are heating of heavy fuel oils, asphalt (bitumen), fatty vegetable oil, animal tallow etc.. The heating coil design which is essentially the area of the coil requires the following two inputs based on the basic heat transfer equation: Q = U*A*ΔT where: Q = heat lost to the surroundings U = Overall heat transfer coefficient A = Coil area ΔT = Temperature difference between the heating medium and the process fluid Q is determined by the steady state heat loss of the hot fluid to the surroundings which includes natural plus forced convection and radiation from the walls of the metallic container (tank). U is the overall heat transfer coefficient obtained by first calculating the various film coefficients for natural convection, forced convection and radiation. The natural convection involves the calculation of the dimensionless numbers, Grashof, Prandtl and Raleigh numbers, Forced convection requires air properties such as air kinematic viscosity, thermal conductivity at the reference air temperature and also involves wind velocity. Radiant heat transfer involves the Stefan-Boltzmann constant and the emissivity of the radiant surface and the reasonably assumed surface temperature. Another topic for another day with all the equations. A is the coil area of the heating medium. ΔT is the temperature difference between the heating medium and the process fluid. U calculation is indeed a bit complex. But if you are using steam as a heating medium in serpentine coils to heat heavy fuel oil (HFO), asphalt or heavy fatty oils in a large storage tank there is a much simpler correlation to calculate U. The attachment with this post provides the simple correlation of overall heat transfer coefficient for heating with steam the above mentioned fluids. Please feel free to share your views and comments. Best Regards, Ankur

The Importance of Tracking Iron in Your Boiler Plant. Do you see all this “powder” on the surface of a boiler steam drum? It is heavy Iron deposits. We found a couple of kilos of the stuff. And it is literally guaranteed to cause boiler tube failures. Boiler feedwater iron will regularly produce porous, insulating boiler tube deposits that cause either failure by overheating of the tube metal or under-deposit corrosion due to localized concentration. Add energy losses and the possibility of affected boiler circulation. The correct monitoring of Iron in your steam plant is thus of paramount importance. Looking attentively at the WHAT, HOW and WHY must be in your gameplan once again. Are you wasting time monitoring SOLUBLE Iron on grab samples in your steam plant? most plants do, regrettably. Because it is wrong. Instead monitor PARTICULATE Iron using 0.45 µm membrane filter pads, and if possible, also Total Iron through a chemical digestion of the particulate and colloidal Iron species in the sample. More work? Yeah, but sure worthy of the effort. Other ways? online monitoring using nephelometers and particle analysers have been used as surrogate measurement techniques but although these instruments provide real-time data, they do not measure Iron directly, and they do not offer quantitative Iron concentrations. MANY TOOLS IN THE PROVERBIAL TOOLBOX. JUST THAT SOME WORK BEST FOR A GIVEN CHALLENGE. Get to know what you truly get for a given tool. Consult or Train with www.iwtacademy.com. #watertreatment #training #boiler #boilerwatertreatment #HRSG #FAC #corrosion #underdepositcorrosion #scaling #scalecontrol #reverseosmosis #RO #fouling #coolingtower #microbiologicalfouling #roelements #romembranes #biofouling #mbfouling #CIP #cleaninginplace #industrialwatertreatment #condenser #powerplant #refinery #pulpandpaper #datacenter #surfacecondenser #airinleakage #chemicalindustry #chemicalprocessing #steamgeneration #steamgenerator #steamturbine #ammoniaplant #ethylene #utilities

What is the effect of air separation load reduction operation on distillation conditions? When the amount of air decreases, the amount of rising vapor and the amount of reflux liquid in the tower decreases, but the reflux ratio remains unchanged. Under normal circumstances, it has little effect on the purity of oxygen and nitrogen products. According to the material balance, the amount of processing air is reduced, and the output of oxygen and nitrogen will be reduced accordingly. When the gas flow is reduced, the vapor flow rate is reduced, the liquid volume on the tray is also reduced, and the liquid layer is thinner, so the tray resistance is reduced. At the same time, because the main cooling and heating load is reduced, the heat transfer area is rich, and the heat transfer temperature difference can also be reduced. These effects will help to reduce the pressure on the upper and lower towers. When the amount of gas is reduced too much, it may occur because the gas speed is too small to hold the liquid on the screen, and the liquid will leak directly from the screen, resulting in a leakage phenomenon. The leaking liquid is not in full contact with the vapor, part of the evaporation is insufficient, and the nitrogen concentration is high. This will greatly reduce the rectification effect, affect the purity of oxygen and nitrogen of the product, and even can not maintain normal production in severe cases. Therefore, the minimum allowable load value is stipulated for the distillation column, which is related to the structural type of the tray and the selection of the design parameters. it is recommended for Air Separation Plants designers and MAC/BAC suppliers to consider operating range 80% ~ 105 % which in turn provide more flexibility and stability of operation We Can Design , manufacture and install Air Separation Plants according customer required specifications and standards For inquiries Email: chemical.technology@hotmail.com  WeChat/WhatsApp +201288849001 #ASU #LOX #LIN #LAR #Ne #Xe #Kr #Steel #Oxygen #Nitogen #argon #ammonia ##methanol ##polymers #petrochemicals #refineries

What is the effect of air separation load reduction operation on distillation conditions? When the amount of air decreases, the amount of rising vapor and the amount of reflux liquid in the tower decreases, but the reflux ratio remains unchanged. Under normal circumstances, it has little effect on the purity of oxygen and nitrogen products. According to the material balance, the amount of processing air is reduced, and the output of oxygen and nitrogen will be reduced accordingly. When the gas flow is reduced, the vapor flow rate is reduced, the liquid volume on the tray is also reduced, and the liquid layer is thinner, so the tray resistance is reduced. At the same time, because the main cooling and heating load is reduced, the heat transfer area is rich, and the heat transfer temperature difference can also be reduced. These effects will help to reduce the pressure on the upper and lower towers. When the amount of gas is reduced too much, it may occur because the gas speed is too small to hold the liquid on the screen, and the liquid will leak directly from the screen, resulting in a leakage phenomenon. The leaking liquid is not in full contact with the vapor, part of the evaporation is insufficient, and the nitrogen concentration is high. This will greatly reduce the rectification effect, affect the purity of oxygen and nitrogen of the product, and even can not maintain normal production in severe cases. Therefore, the minimum allowable load value is stipulated for the distillation column, which is related to the structural type of the tray and the selection of the design parameters. it is recommended for Air Separation Plants designers and MAC/BAC suppliers to consider operating range 80% ~ 105 % which in turn provide more flexibility and stability of operation We Can Design , manufacture and install Air Separation Plants according customer required specifications and standards For inquiries Email: chemical.technology@hotmail.com  WeChat/WhatsApp +201288849001 #ASU #LOX #LIN #LAR #Ne #Xe #Kr #Steel #Oxygen #Nitogen #argon #ammonia ##methanol ##polymers #petrochemicals #refineries

The Importance of Tracking Iron in Your Boiler Plant.  Do you see all this “powder” on the surface of a boiler steam drum? It is heavy Iron deposits. We found a couple of kilos of the stuff. And it is literally guaranteed to cause boiler tube failures. Boiler feedwater iron will regularly produce porous, insulating boiler tube deposits that cause either failure by overheating of the tube metal or under-deposit corrosion due to localized concentration. Add energy losses and the possibility of affected boiler circulation. The correct monitoring of Iron in your steam plant is thus of paramount importance. Looking attentively at the WHAT, HOW and WHY must be in your gameplan once again. Are you wasting time monitoring SOLUBLE Iron on grab samples in your steam plant? most plants do, regrettably. Because it is wrong. Instead monitor PARTICULATE Iron using 0.45 µm membrane filter pads, and if possible, also Total Iron through a chemical digestion of the particulate and colloidal Iron species in the sample. More work?  Yeah, but sure worthy of the effort.  Other ways? online monitoring using nephelometers and particle analysers have been used as surrogate measurement techniques but although these instruments provide real-time data, they do not measure Iron directly, and they do not offer quantitative Iron concentrations.  MANY TOOLS IN THE PROVERBIAL TOOLBOX. JUST THAT SOME WORK BEST FOR A GIVEN CHALLENGE. Get to know what you truly get for a given tool. Consult or Train with www.iwtacademy.com. #watertreatment #training #boiler #boilerwatertreatment #HRSG #FAC #corrosion #underdepositcorrosion #scaling #scalecontrol #reverseosmosis #RO #fouling #coolingtower #microbiologicalfouling #roelements #romembranes #biofouling #mbfouling #CIP #cleaninginplace #industrialwatertreatment #condenser #powerplant #refinery #pulpandpaper #datacenter #surfacecondenser #airinleakage #chemicalindustry #chemicalprocessing #steamgeneration #steamgenerator #steamturbine #ammoniaplant #ethylene #utilities

PH5804 High Temperature pH Sensor It is suitable for the most demanding applications in process and industrial measurement technology. And it can be used in Chemical industry,Industrial wastewater engineering,Power plants and waste incineration plants (flue gas scrubbing),Sugar industry and so on. • High process pressures up to 13 bar • Broad temperature range up to max. 135 °C • PTFE ring diaphragm • VP plug head, Pg13.5 thread • Temperature sensor:PT1000 #phsensor #chemical #sugarplant #wastewater

#heattransfer #forced #convective #combined Dear Chemical Engineers, My earlier post on convective heat transfer was for natural convective heat transfer. The link for that post is provided below: https://lnkd.in/dn2W8ZbR When performing heat loss or heat gain calculations for equipment or piping all heat transfer mechanisms need to be considered i.e. natural convection, forced convection and radiant heat transfer. Today's post discusses about the forced heat transfer coefficient and how to calculate the total convective heat transfer coefficient known the natural and forced convective heat transfer coefficient. The attachment with this post provides the equation for forced convective heat transfer coefficient exposed to ambient air. It could be a pipe or an equipment (pressure vessel / storage tank (cylindrical / spherical)). Please feel free to share your views and comments. Best Regards, Ankur. PS: There was an error in the equation I had posted in the attachment. The error is regretted and the corrected attachment is provided.