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Articles 31 - 60 of 100
Full-Text Articles in Industrial Engineering
Fouling Mitigation With Synthetic Fibres In A Caso4 Supersaturated Solution, M. Rost, G. G. Duffy
Fouling Mitigation With Synthetic Fibres In A Caso4 Supersaturated Solution, M. Rost, G. G. Duffy
Heat Exchanger Fouling and Cleaning VII
Wood pulp fibre suspensions and model synthetic fibre suspensions have been shown previously to mitigate effectively calcium sulphate fouling in heat exchangers. Fibre flexibility was found to be a decisive fibre property in fouling mitigation. Adding fibres to a fouling fluid is environmentally benign and can be applied during operation without shutting down the heat exchanger. Because polymer fibres are more robust in a hostile environment, further work was initiated with two types of rayon fibre and one acrylic fibre of the same fibre length. Experiments were performed at both constant and varying fibre volume concentrations. The more flexible rayon …
Extending The Induction Period Of Crystallization Fouling Through Surface Coating, T. Geddert, I. Bialuch, W. Augustin, S. Scholl
Extending The Induction Period Of Crystallization Fouling Through Surface Coating, T. Geddert, I. Bialuch, W. Augustin, S. Scholl
Heat Exchanger Fouling and Cleaning VII
To minimize the negative effects of scale formation in heat exchangers, new anti-fouling strategies are focusing on the modification of heat transfer surfaces. These modifications should lead to tailored made surfaces for different technical applications. Aim of this surface modification is the extension of the induction period to minimize the negative effects of fouling and maximize the endurance of the heat exchanger. To achieve such, different surface coatings on stainless steel were investigated in respect of fouling tendency. The effect of flow velocity respectively Reynolds number on the induction time of CaSO4 crystallization fouling were tested in different test units. …
Interaction Of Whey Protein With Modified Stainless Steel Surfaces, S.S. Premathilaka, M.M. Hyland, X.D. Chen, L.R. Watkins, B. Bansal
Interaction Of Whey Protein With Modified Stainless Steel Surfaces, S.S. Premathilaka, M.M. Hyland, X.D. Chen, L.R. Watkins, B. Bansal
Heat Exchanger Fouling and Cleaning VII
Modified stainless steel surfaces were fouled with whey protein solutions to study the deposition mechanisms and the effects of surface modification. Stainless steel samples were coated with diamond-like carbon (DLC) and titanium nitride (TiN). These surfaces are expected to present different surface chemistries to stainless steel in terms of their functional groups and hydrophobic or hydrophilic nature. Thus, it is expected that foulant-surface interactions will differ for the various fouled surfaces. The substrates were exposed to a flowing whey protein solution in a fouling rig designed to achieve laminar flow. X-ray Photoelectron Spectroscopy (XPS) was used to study the initial …
Surface Treatment For The Mitigation Of Whey Protein Fouling, W. Augustin, T. Geddert, S. Scholl
Surface Treatment For The Mitigation Of Whey Protein Fouling, W. Augustin, T. Geddert, S. Scholl
Heat Exchanger Fouling and Cleaning VII
Heat transfer fouling experiments were carried out in a temperature controlled stirred vessel using aqueous solutions of whey protein concentrate in the concentration range of 3 to 3.5 wt-% at a bulk temperature of 50 °C and pH of 6. Heat transfer data were obtained from thermocouples embedded in an immersed electrical heating rod with various metal plates attached with-and-without surface treatments. Measurements included solution temperature, heating element surface temperature, and heat duty. Results are presented as fouling resistance versus time for aluminum, copper, stainless steel, electro-polished stainless steel, and surfaces coated with DLC and doped with Si , SiO, …
Experiments And Modelling Of Calcium Sulphate Precipitation Under Sensible Heating Conditions: Initial Fouling And Bulk Precipitation Rate Studies, F. Fahiminia, A. P. Watkinson, N. Epstein
Experiments And Modelling Of Calcium Sulphate Precipitation Under Sensible Heating Conditions: Initial Fouling And Bulk Precipitation Rate Studies, F. Fahiminia, A. P. Watkinson, N. Epstein
Heat Exchanger Fouling and Cleaning VII
Crystallization of calcium sulphate, an inverse solubility salt, on a heated surface under sensible heating conditions has been studied. A temperature measurement technique was employed to detect initial fouling rates. Fouling experiments were carried out to determine how process variables such as surface temperature and velocity affect the initial fouling rates of calcium sulphate scaling. Experimental results show that, at a given surface temperature, there exists a maximum initial fouling rate for a range of fluid velocities. Also, this maximum rate and the fluid velocity at which it occurs both increase as the surface temperature increases. These observations are all …
Flow Cell Studies On Fouling Caused By Protein -Calcium Phosphate Deposition In Turbulent Flow, R. Rosmaninho, G. Rizzo, H. Muller-Steinhagen, L. F. Melo
Flow Cell Studies On Fouling Caused By Protein -Calcium Phosphate Deposition In Turbulent Flow, R. Rosmaninho, G. Rizzo, H. Muller-Steinhagen, L. F. Melo
Heat Exchanger Fouling and Cleaning VII
A comparative study of the calcium phosphate fouling process, with and without proteins, was carried out using both standard 316 2R stainless steel and 2R surfaces modified by TiN magnetron sputtering. Fouling behavior was assessed in a heat transfer flow cell operating in the turbulent flow regime. The fouling curves resulting from calcium phosphate deposition in the absence of proteins were substantially different from the ones obtained when protein was present. In this last case, two different fouling periods could be observed. The surface energy of the modified materials was found to affect the deposition parameters (rate of deposition and …
Investigation Of Fouling Process For Convective Heat Transfer In An Annular Duct, Y.C. Chen, Z.H. Quan, C.F. Ma
Investigation Of Fouling Process For Convective Heat Transfer In An Annular Duct, Y.C. Chen, Z.H. Quan, C.F. Ma
Heat Exchanger Fouling and Cleaning VII
Experimental and theoretical study is summarized of fouling process on heat transfer surface. An automatic monitoring system was set up to determine impact of fouling. Experiments were performed with artificial hard water as a working fluid at different conditions. Some important parameters including water temperature, wall temperature, flow velocity, water hardness and alkalinity were testified to make sure their influences on the fouling process on heat transfer surfaces. The ranges of water temperature, wall temperature, flow velocity and water hardness are between 20～50℃, 50～75℃, 0.5～2.0m/s, 200 ～ 1000mg/L (as CaCO3), respectively. All the experimental data were recorded continuously and the …
Fouling Mechanisms By Ab Initio Calculations Condensation Reactions On The Rutile (101) Surface And Adsorption Of Ions On The Cr2o3 Surfaces, E. Puhakka, M. Riihimäki, R.L. Keiski
Fouling Mechanisms By Ab Initio Calculations Condensation Reactions On The Rutile (101) Surface And Adsorption Of Ions On The Cr2o3 Surfaces, E. Puhakka, M. Riihimäki, R.L. Keiski
Heat Exchanger Fouling and Cleaning VII
Molecular modelling approach was utilized to describe detailed fouling mechanism caused by crystallization. The interest was on the heat transfer surfaces, which were manufactured from titanium and stainless steel. With ab initio calculations, the role of the surface oxide layer structure of titanium and stainless steel on fouling was investigated. The surface structure of titanium and stainless steel were assumed to consist of rutile (TiO2) and dichromium trioxide (Cr2O3), respectively. It was found that the inorganic fouling depends strongly on the oxide layer structure and the existence of hydroxyl groups on the surface. Based on the results, two mechanistically different …
Modelling Of Particulate Fouling On Heat Exchanger Surfaces: Influence Of Bubbles On Iron Oxide Deposition., D.H. Lister, F.C. Cussac
Modelling Of Particulate Fouling On Heat Exchanger Surfaces: Influence Of Bubbles On Iron Oxide Deposition., D.H. Lister, F.C. Cussac
Heat Exchanger Fouling and Cleaning VII
Studies of iron oxide deposition on Alloy-800 heatexchanger tubes have been part of a continuing research program at the University of New Brunswick; the present work formulates mechanisms for the effect of bubbles on deposition in water under boiling conditions. To supplement results from earlier deposition experiments in a fouling loop at UNB, measurements of bubble frequency and departure diameter as a function of heat flux were performed. High-speed movies of bubbling air/water systems indicated that a pumping action moved particles from adjacent areas at the surface to bubble nucleation sites. To explain the observations, the model considers deposition and …
Simultaneous Consideration Of Flow And Thermal Effects Of Fouling In Crude Oil Preheat Trains, G.T. Polley, A. Morales Fuentes, D.I. Wilson
Simultaneous Consideration Of Flow And Thermal Effects Of Fouling In Crude Oil Preheat Trains, G.T. Polley, A. Morales Fuentes, D.I. Wilson
Heat Exchanger Fouling and Cleaning VII
Given models linking flow resistance and fouling resistance it becomes possible to simulate the effects of fouling on the hydraulic performance of a refinery pre-heat train. Such a simulation has been used here to identify when plant throughput will be limited by pressure drop; how throughput can be improved through the cleaning of individual exchangers and groups of exchangers; and how much production can be maintained when individual exchangers are taken off-line. Determination of better operating strategy requires a simulation of both hydraulic and thermal performance. In this paper we implement a pragmatic linked model and consider the results from …
Optimization Of Flow Direction To Minimize Particulate Fouling Of Heat Exchangers, M.S. Abd-Elhady, C.C.M. Rindt, A.A. Van Steenhoven
Optimization Of Flow Direction To Minimize Particulate Fouling Of Heat Exchangers, M.S. Abd-Elhady, C.C.M. Rindt, A.A. Van Steenhoven
Heat Exchanger Fouling and Cleaning VII
The influence of flow direction with respect to gravity on particulate fouling of heat exchangers is investigated experimentally to determine the optimal flow direction to minimize fouling. Four orientations of flow have been investigated, horizontal flow, upward flow, downward flow and a flow under an angle of 45°. It is observed that fouling starts at the point of stagnation irrespective of the flow direction, and also at the top of the heat exchanger tubes. Particulate fouling grows from these two points till they meet and the fouling layer covers the whole surface of the heat exchanger tube. Fouling at the …
Incorporation Of A Consideration Of Fouling Into The Design Of Vertical Thermo-Siphon Re-Boilers, G.T. Polley, S.J. Pugh
Incorporation Of A Consideration Of Fouling Into The Design Of Vertical Thermo-Siphon Re-Boilers, G.T. Polley, S.J. Pugh
Heat Exchanger Fouling and Cleaning VII
Two causes of under-performance within the tubes of vertical thermo-siphon re-boilers (VTR’s) are considered: premature dry-out within the unit and chemical reaction fouling at the tube wall. In many cases dryout is itself a cause of fouling. Both of these causes depend on re-boiler geometry. Some geometry performs satisfactorily. Other geometry performs poorly. There are two basic forms of flow boiling: nucleate flow boiling and convective flow boiling. In nucleate flow boiling part of the vaporisation results from the formation of bubbles of vapour on the heated surface. Unfortunately, a thin liquid film (the micro-layer) formed beneath these bubbles can …
A Lagrangian Particle Cfd Post-Processor Dedicated To Particle Adhesion/Deposition, M. Losurdo, C. Bertrand, H. Spliethoff
A Lagrangian Particle Cfd Post-Processor Dedicated To Particle Adhesion/Deposition, M. Losurdo, C. Bertrand, H. Spliethoff
Heat Exchanger Fouling and Cleaning VII
In the past few years the use of biomass in power plants has grown dramatically. As a result of this action fouling and slagging in co-firing biomass facilities have turned out to play a critical role in the efficiency of such facilities. Efficient and effective methods are therefore needed to control fouling to an acceptable level and to prevent economic losses due to reduced furnace thermal efficiency, increased maintenance or even unscheduled outages. Numerical prediction of the impact of deposit properties has proved itself to be a successful strategy to both evaluate changes in the facility performance and to investigate …
A Survey Of Alfa Laval’S Experience Of Fouling Prevention In Plate Heat Exchanger Systems, A. Tornqvist
A Survey Of Alfa Laval’S Experience Of Fouling Prevention In Plate Heat Exchanger Systems, A. Tornqvist
Heat Exchanger Fouling and Cleaning VII
This paper will present some aspects on and experiences of fouled plate heat exchangers in industrial applications as well as the present status on a new tool to monitor heat exchanger performance and to predict future cleaning procedures.
Computation And Evaluation Of Wall Shear Stress Distribution At The Lower Surface Of A Radial Flow Cell, J. G. Detry, B. B. B. Jensen, C. Deroanne, M. Sindic
Computation And Evaluation Of Wall Shear Stress Distribution At The Lower Surface Of A Radial Flow Cell, J. G. Detry, B. B. B. Jensen, C. Deroanne, M. Sindic
Heat Exchanger Fouling and Cleaning VII
In the present work, the flow in the radial-flow cell was analyzed for an aspect ratio of 1 with inlet pipe Reynolds numbers of 950, 2 000 and 4 100. Two models were applied to compute the wall shear stress distribution at the lower surface, at any distance from the center. Stainless steel and polystyrene surfaces were soiled with oil and starch and the detachment of these soils was assessed by measuring the detachment radius in a radial-flow cell. The experimental radii were introduced in the models and converted into wall shear stress. Comparisons of the various sets of data …
Effect Of Thermal Contact Resistance On The Heat Transfer In Plate Finned Tube Heat Exchangers, D. Taler
Effect Of Thermal Contact Resistance On The Heat Transfer In Plate Finned Tube Heat Exchangers, D. Taler
Heat Exchanger Fouling and Cleaning VII
Plate fin-and-tube heat exchangers are made by inserting oval tubes through sheet metal strips with stamped holes and then expanding the tubes slightly to cause pressure at the tube-to-strip contacts. The gap between the fin base and the outer tube surface may be filled with air or corrosion products causing a decline in the ability of plate fins to transfer heat. The contact resistance must be accounted for in the design and performance calculations of heat exchangers. In this paper, the thermal contact resistance of the fin-to-tube attachment is estimated from the condition that the dimensionless correlations for the Colburn …
Low Fouling Crude Oil Preheaters: Scrap Your Existing Conventional Crude Oil Preheaters, Replace Them By Low Fouling Heat Exchangers And Save Money, D.G. Klaren, E.F. De Boer, D.W. Sullivan
Low Fouling Crude Oil Preheaters: Scrap Your Existing Conventional Crude Oil Preheaters, Replace Them By Low Fouling Heat Exchangers And Save Money, D.G. Klaren, E.F. De Boer, D.W. Sullivan
Heat Exchanger Fouling and Cleaning VII
In a time that crude oil prices are constantly higher than US$ 60 per barrel, low fouling heat exchangers can reduce total fouling cost in all crude oil preheat trains in the world with a throughput of 74 Mn bpd by 90%. For 2006, this is a reduction from approximately US$ 11 Bn to US$ 1.3 Bn and a saving on annual fouling cost of US$ 9.7 Bn. Besides this saving on fouling cost, substantial additional savings can be realized on energy by a more ‘energy efficient’ design of the crude oil preheat train. The advantages of the low fouling …
Intelligent Discrimination Model To Identify Influential Parameters During Crystallisation Fouling, M.R. Malayeri, H. Müller-Steinhagen
Intelligent Discrimination Model To Identify Influential Parameters During Crystallisation Fouling, M.R. Malayeri, H. Müller-Steinhagen
Heat Exchanger Fouling and Cleaning VII
The introduction of redundant independent variables into any function approximation model, or the neglect of important variables, may result in a correlation with poor prediction and reduced reliability. This paper demonstrates that a novel integrated model of neural networks and genetic algorithms can deal with this problem robustly with good accuracy, while be far less time-consuming compared to lengthy conventional models Furthermore, a redundant variable input was imposed to the model to discern if the approach could identify it among other important variables. Genetic algorithms were exploited as a powerful optimisation tool for the selection of best set of inputs …
Fluid Dynamic Gauging In Duct Flows – Experiments And Cfd Simulations, T. Gu, Y.M.J. Chew, W.R. Paterson, D.I. Wilson
Fluid Dynamic Gauging In Duct Flows – Experiments And Cfd Simulations, T. Gu, Y.M.J. Chew, W.R. Paterson, D.I. Wilson
Heat Exchanger Fouling and Cleaning VII
The technique of fluid dynamic gauging (FDG) has been developed to measure the thickness of deformable foulant deposits on solid immersed in liquid, in real time and in situ, with a precision of ± 10 micron. Suction is imposed across a gauging nozzle; the flow rate of liquid through the nozzle allows calculation of the proximity of the nozzle to the surface of the deposit. The technique has been demonstrated by Tuladhar et al. (2000) to work well in quasi-static situations, where the bulk liquid is not moving apart from the gauging flow, and in duct flows. FDG in the …
Fouling During The Use Of ‘Fresh’ Water As Coolant- The Development Of A ‘User Guide’, S. J. Pugh, G. F. Hewitt, H. Müller-Steinhagen
Fouling During The Use Of ‘Fresh’ Water As Coolant- The Development Of A ‘User Guide’, S. J. Pugh, G. F. Hewitt, H. Müller-Steinhagen
Heat Exchanger Fouling and Cleaning VII
IHS ESDU recently published its latest ‘User Guide’ to fouling in heat exchange systems, for systems with fresh water as the coolant. ESDU 07006 [1] is the third in a group, following the development of the Crude Oil Fouling User Guide [2] issued in 2000 and the Seawater Fouling User Guide [3] issued in 2004. ESDU 07006 was developed by IHS ESDU over a period of five years under the guidance of the Oil Industry Fouling Working Party, a collaborative team of oil refiners, heat transfer equipment and services suppliers and Universities. It provides designers and operators of cooling water …
Achievements And Potential Of Self-Cleaning Heat Exchangers Using Untreated Natural Seawater As A Coolant, D.G. Klaren, E.F. De Boer
Achievements And Potential Of Self-Cleaning Heat Exchangers Using Untreated Natural Seawater As A Coolant, D.G. Klaren, E.F. De Boer
Heat Exchanger Fouling and Cleaning VII
The fluidized bed self-cleaning heat exchange technology has been developed in the 70s for the application in thermal desalination plants, like Multi-Stage Flash (MSF) evaporators. This paper summarizes the achievements of the Multi-Stage Flash / Fluidized Bed Evaporator (MSF/FBE) in the past, but also pays attention to its market potential today, whether or not in combination with the possible revamp of existing conventional MSF plants into a better performing configuration. Further, this paper also pays attention to the application of the self-cleaning heat exchange technology for closedloop coolers or so-called ‘mother-coolers’ for large chemical plants. Last but not least, attention …
Influence Of Different Surface Materials On The Fouling Process In A Microstructured Heat Exchanger Under Laminar Regime, W. Benzinger, J.J. Brandner, U. Schygulla, K. Schubert
Influence Of Different Surface Materials On The Fouling Process In A Microstructured Heat Exchanger Under Laminar Regime, W. Benzinger, J.J. Brandner, U. Schygulla, K. Schubert
Heat Exchanger Fouling and Cleaning VII
Microstructure devices are well known for their excellent performance with regard to heat and mass transfer. Microstructured heat exchangers show significant advantages in comparison with conventional heat exchangers. The unique properties of a microreaction system show high overall heat transfer coefficients for example. Small characteristic dimensions are in the order of a few hundred μm (Schubert et al., 1998, 2001; Worz et al, 1998). Due to the small dimensions, an increased pressure drop is combined with excellent heat transfer properties. But the small channels are prone to fouling processes. The accumulation of crystalline deposits is a severe problem. An additional …
Cleaning And Prevention Of Inorganic Deposits In Plate Heat Exchangers Using Pulsating Current, A. Pehkonen, J. Aromaa, O. Forsén, J. Virtanen, I. Galfi
Cleaning And Prevention Of Inorganic Deposits In Plate Heat Exchangers Using Pulsating Current, A. Pehkonen, J. Aromaa, O. Forsén, J. Virtanen, I. Galfi
Heat Exchanger Fouling and Cleaning VII
Fouling of heat exchangers is a major problem in many industrial processes. The higher temperature of the heat exchange surface compared with the liquid containing precipitable compounds causes the formation of inorganic deposits. Removing the deposits on plate heat exchangers is most often carried out by high-pressure cleaning. This is a laborious task and often increases the corrosion rate of the plates by increasing the roughness of the cleaned surface. This study presents an electrochemical method to clean heat exchange surfaces fouled by deposits and to prevent formation of deposits. This method utilizes pulsating current to polarize heat exchange surfaces …
Hitran® Wire Matrix Inserts In Fouling Applications, J.M. Ritchie, P. Droegemueller, M.J.H. Simmons
Hitran® Wire Matrix Inserts In Fouling Applications, J.M. Ritchie, P. Droegemueller, M.J.H. Simmons
Heat Exchanger Fouling and Cleaning VII
Fouling characteristics are dictated largely by the properties of the thermal and hydrodynamic boundary layers. As a result, fouling mitigation strategies must take into account the conditions in this region. hiTRAN® wire matrix tube inserts are a useful tool in altering the conditions near the tube wall, especially in the laminar and transition flow regions. This review paper considers Particle Image Velocimetry (PIV) and Laser Doppler Velocimetry (LDV) measurements, which were employed in order to show the hydrodynamic differences between plain tubes and those containing inserts. Measurements indicate that the wall shear rate in tubes containing hiTRAN® inserts operating in …
Automatic Tube Cleaning System (Atcs) Installation In Sulfide Retrieval Monoethanolamine Treatment Plant: Case Study And Fouling Global Perspectives, Chemi Sugarmen, Udi Siboni, Ruth Volansky
Automatic Tube Cleaning System (Atcs) Installation In Sulfide Retrieval Monoethanolamine Treatment Plant: Case Study And Fouling Global Perspectives, Chemi Sugarmen, Udi Siboni, Ruth Volansky
Heat Exchanger Fouling and Cleaning VII
Automatic cleaning of heat exchangers and condensers tubes by means of sponge balls is well known since the early fifties, with expanding application from steam power plants to process industry to industrial cooling and air conditioning systems. Main benefits bottom-lined in cost savings are generally considered as: elimination of maintenance down-time and need for chemical and more efficient operation of process and plant. This paper presents the performance and benefits of an Automatic Tube Cleaning System (ATCS) implementations, in a hydrogen sulfide retrieval Monoethanolamine treatment Plant in Paz Ashdod Refinery, one of the two refineries in Israel. Patented by CQM …
Double Perforated Impingement Plate (Dpip) In Shell-And-Tube Heat Exchanger, S. S. Al-Anizi, A. M. Al-Otaibi
Double Perforated Impingement Plate (Dpip) In Shell-And-Tube Heat Exchanger, S. S. Al-Anizi, A. M. Al-Otaibi
Heat Exchanger Fouling and Cleaning VII
This paper presents a solution to a chronic problem causing repeated tube failure at shell-and-tube heat exchangers. The problem is related to fouling process on tubes surface which accumulates downstream the impingement plate at exchanger inlet nozzle within the first tube rows due to low velocity and vortices production. In fouling services, the suspended deposits, fouling, accumulates on tubes surface downstream the impingement plate causing under-deposit corrosion and raising tubes surface temperature due to lack of cooling accelerating fouling process. Under fouling corrosion attacks tubes and causes repeated tube failure costing a lot of money in terms of material, maintenance …
Towards An Understanding Of How Tube Inserts Mitigate Fouling In Heat Exchangers, B. Aquino, C. Derouin, G.T. Polley
Towards An Understanding Of How Tube Inserts Mitigate Fouling In Heat Exchangers, B. Aquino, C. Derouin, G.T. Polley
Heat Exchanger Fouling and Cleaning VII
A number of studies undertaken by Total have measured the improvement that can be expected when TurbotalTM inserts are installed in heat exchangers. These studies have fully established that TurbotalTM both improve heat transfer coefficient and mitigate fouling. It has been found that fouling levels vary with application. Consequently, economics of installing inserts are difficult to quantify. Gains must be estimated through specific tests. A model that predicts fouling development solves this problem. In this paper first steps towards the understanding of how TurbotalTM limits the fouling rate are described. Authors suggest that the calculation of both pressure drop and …
Cleaning High-Speed Marine Separators With An Environmentally-Friendly Cip Agent, Ulf Nylén, Roger Andersson, Peter Forsberg
Cleaning High-Speed Marine Separators With An Environmentally-Friendly Cip Agent, Ulf Nylén, Roger Andersson, Peter Forsberg
Heat Exchanger Fouling and Cleaning VII
The present contribution is devoted to the cleaning of high-speed marine separators employing the environmentally-friendly Cleaning In Place (CIP) agent Alpacon Multi Cip Super. For this particular study an Alfa Laval lube oil separator of type S831 on board the ship MS Isabella was dismantled prior to its first CIP treatment since installation and a few of the sludge-coated insert discs were taken as samples for laboratory experiments. Following assembly, the separator was cleaned according to a standard CIP protocol. Back in the laboratory, experiments mimicking the field CIP conditions verified the excellent cleaning results observed by visual inspection out …
Biofouling Control In Heat Exchangers Using High Voltage Capacitance Based Technology, R. Romo, M. M. Pitts, N. B. Handagama
Biofouling Control In Heat Exchangers Using High Voltage Capacitance Based Technology, R. Romo, M. M. Pitts, N. B. Handagama
Heat Exchanger Fouling and Cleaning VII
Biofouling in industrial heat exchangers and piping systems is common in water from all sources. Problems generated by biofouling such as corrosion, sludge deposition and scale formation have a costly impact on industrial equipment and productivity. This paper describes an electronic approach using High Voltage Capacitance Based technology (HVCB) to control biofouling in industrial heat exchangers, focusing upon biofilm removal and the prevention of biofilm formation. Four different application case studies are presented in this paper in which the HVCB technology was used to control biofouling. The applications include an evaporative cooling wall in a greenhouse in Oracle, Arizona; a …
Cleaning Monitoring Using Controlled Nano-Vibrations, A. Pereira, J. Mendes, L.F. Melo
Cleaning Monitoring Using Controlled Nano-Vibrations, A. Pereira, J. Mendes, L.F. Melo
Heat Exchanger Fouling and Cleaning VII
The monitoring of fouling and cleaning has become very important in order to optimize production cycles, to increase the quality of the final product and to reduce environmental impacts. The aim of the study here presented was to use the MSS – Mechatronic Surface Sensor, to detect the cleaning end-point of hair shampoo removal under different cleaning conditions. It was found that this new monitoring tool was able to clearly identify when the equipment was cleaned, producing different cleaning curves for different cleaning conditions.