scholarly journals EMbaffle® Heat Transfer Technology Step-Up in CO2 Reduction

2021 ◽  
Author(s):  
Marco Rottoli ◽  
Daniele Agazzi ◽  
Marcello Garavaglia ◽  
Fabio Grisoni
Keyword(s):  
Power Efficiency ◽  
Water Flow Rate ◽  
Cooling Water ◽  
Co2 Reduction ◽  
Primary Role ◽  
Gas Treatment ◽  
Pressure Drops ◽  
Tube Heat Exchanger ◽  
Cooling Water Flow Rate ◽  
Shell And Tube

EMbaffle® is a proprietary shell and tube heat exchanger technology, designed to improve performance by pressure drops control, with suppressed tube vibrations. Developed to minimize fouling accumulation in crude oil units, the technology has proved to be effective in Gas treatment and Petrochemical, supporting the increase in gas–gas and cooling water flow rate per-unit demand, and in Renewable CSP, where Molten Salt units get a primary role in thermal storage and power efficiency. Diamond shape and baffle-grids number are the instruments for the design engineer to exploit exchanger efficiency against pressure drops, aimed to the desired performance with the optimized power consumption. Further to introduce the base of the technology, this work will also address the design of higher compact units by combining the grids performance with the improved exchanger tube surface. Experimental data to support the grid life under critical working conditions and actual performances with fluids density and viscosity are reported.

The Numerical Simulation and Design of a Homogeneous Nonisothermal Multi-pass Shell-and-Tube Reactor

1973 ◽  
Vol 95 (2) ◽  
pp. 206-210
Author(s):  
T. G. Smith ◽  
J. T. Banchero
Keyword(s):  
Shooting Method ◽  
Water Flow Rate ◽  
Cooling Water ◽  
Minimum Size ◽  
Exothermic Reactions ◽  
Cooling Water Temperature ◽  
Tube Reactor ◽  
Cooling Water Flow Rate ◽  
Maximum Reaction ◽  
Shell And Tube

The simulation of a multi-pass shell-and-tube reactor requires the solution of a nonlinear two-point boundary-value problem. Six nonlinear ordinary differential equations describing the production of ethanolamines in 1–2 and 1–4 shell-and-tube reactors are solved numerically using both a quasi-linearization algorithm and a classical shooting method. Despite the presence of five unknown initial values, the shooting-method approach proved superior for this particular problem. The simulation revealed that for exothermic reactions the optimum tube-side temperature profile (and therefore the minimum-size reactor) was most closely approached by designing for the lowest overall heat transfer coefficient and cooling-water flow rate and highest inlet cooling-water temperature, subject to the constraint of a maximum-reaction mixture temperature.

scholarly journals Design improvement and experimental study on shell and tube condenser for bio-oil recovery from fast pyrolysis of wheat straw biomass

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
B. L. Salvi ◽  
T. Soni ◽  
S. Jindal ◽  
N. L. Panwar
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Water Flow Rate ◽  
Cooling Water ◽  
Gas Flow Rate ◽  
Design Improvement ◽  
Cooling Water Flow Rate ◽  
Bio Oil ◽  
Shell And Tube ◽  
Tube Condenser

AbstractIn this study, the design improvement was done in a shell and tube condenser for improved heat transfer and condensation of bio-oil vapour. The developed condenser has split shell and segmental baffles, which divide the shell in various zones and condensate collection points. The fast pyrolysis of wheat straw was done and the bio-oil vapour condensate collected from various outlets located at bottom of condenser shell. From experimental results it was found that production of bio-oil increased from 10.2 to 20.8% with increase in cooling water flow rate from 1000 to 2500 L/h; but, further increasing it beyond 2500 L/h provide marginal effects on production of bio-oil. The production of bio-oil increased from 15.2 to 20.7% as sweep gas flow rate was increased from 20 to 40 L/min at 2500 L/h of cooling water flow rate. But, further increase in sweep gas flow rate beyond 40 L/min resulted in to decrease in production of bio-oil. The novelty of this work is development of improved condenser with segmental baffles, which help in fractional condensation of bio-oil vapour, split shell for cleaning of outer surface of the cooling water tubes and compact design of condenser for optimal condensation of bio-oil.

Efficient Replacement of Centrifugal With Absorption Chillers Upgrading the Heat Transfer of the Cooling Tower

2001 ◽  
Author(s):  
E. D. Rogdakis ◽  
V. D. Papaefthimiou
Keyword(s):  
Flow Rate ◽  
Cooling Tower ◽  
Water Flow Rate ◽  
Cooling Water ◽  
Double Effect ◽  
Operating Conditions ◽  
Cooling Power ◽  
Absorption Chiller ◽  
Absorption Chillers ◽  
Cooling Water Flow Rate

Abstract It is a general trend today, the old centrifugal machines to be replaced by new absorption machines. The mass flow rate of the cooling water in the centrifugal machines is normally 30% less than that in the two-stage absorption chiller for the same refrigerating capacity. Some absorption chillers manufacturers have updated and improved the double-effect technology increasing the cooling water temperature difference from the typical value of 5.5°C to 7.4°C and reducing the cooling water flow rate by about 30%. Using such a modern double effect absorption unit to replace a centrifugal chiller the same cooling water circuit can be used and the total cost of the retrofit is minimized. In this case a new flow pattern of the cooling tower is developed, and in this paper the design of a new tower fill is predicted taking into account the new factors characterizing the operating conditions and the required performance of the tower. As an example, the operational curves of a modified cooling tower (1500 KW cooling power) used by a 240 RT double-effect absorption chiller are presented.

Effective Fuel Consumption by Improving Cooling Water Flow Rate in IC Engine

2015 ◽  
Vol 812 ◽  
pp. 112-117
Author(s):  
K.M. Kumar ◽  
P. Venkateswaran ◽  
P. Suresh
Keyword(s):  
Flow Rate ◽  
Cooling System ◽  
Water Flow Rate ◽  
Research Work ◽  
Cooling Water ◽  
Major Change ◽  
Clear Understanding ◽  
Water Pump ◽  
Ic Engine ◽  
Cooling Water Flow Rate

The coolant (water) pump assumes an important role of cooling system in IC engines. With upgrading of the engine power by turbocharging and turbo inter cooling, the water pump capacity needs to be increased corresponding to the power. This capacity enhancement has to be achieved without calling for a major change in the existing water pump, envelop and related fitment details. This requires a clear understanding of centrifugal pump for its performance parameter. One such engine is upgraded by turbocharging from 195PS to 240PS @2200 rpm. Improving water pump flow by changing the impeller dimensions, impeller casing, increase the suction, delivery pipe diameter had been done. Validation of the water pump in its actual engine installation was taken up as a part of the research work. Flow rate comparison of the new pump with the existing pump was made and the results were analyzed. The new water pump gives better flow rates for the engine speeds up to1800 rpm, beyond which the flow rate is slightly lesser than the existing pump.

Effect of the cooling water flow rate to control self-heating of coal in a cylindrical reactor heated by a hot plate heater

2020 ◽  
Author(s):  
Sofi Hesti Fathia ◽  
Inkasandra Faranisa Kolang ◽  
Ricky Putro Satrio Wicaksono ◽  
Achmad Riadi ◽  
Yulianto Sulistyo Nugroho
Keyword(s):  
Water Flow ◽  
Flow Rate ◽  
Water Flow Rate ◽  
Cooling Water ◽  
Hot Plate ◽  
Self Heating ◽  
Cooling Water Flow Rate ◽  
Cylindrical Reactor ◽  
Plate Heater

Experimental Study on the Desalination System Using Humidification-Dehumidification Technology

2020 ◽  
Vol 1008 ◽  
pp. 177-185
Author(s):  
Hamed Abbady ◽  
Mahmoud Salem Ahmed ◽  
Hamdy Hassan ◽  
A.S.A. Mohamed
Keyword(s):  
Water Temperature ◽  
Water Flow ◽  
Flow Rate ◽  
Water Flow Rate ◽  
Cooling Water ◽  
Operating Conditions ◽  
Outlet Temperature ◽  
Major Objective ◽  
Cooling Water Flow Rate ◽  
Output Ratio

In this paper, an experimental work studies the principal operating parameters of a proposed desalination process using air humidification-dehumidification method. The major objective of this work is to determine the humid air behavior through the desalination system. Different operating conditions including the effect of the water temperature at the entry to the humidifier, the ratio of the mass of water to the air, the air/water flow rate, and cooling water at entry the dehumidifier on the desalination performance were studied. The results show that the freshwater increases with increasing the water temperature at the inlet of the humidifier, the ratio of the mass of water to air, and cooling water flow rate in the dehumidifier. Cooling water outlet temperature at the condenser increases with increasing the water temperature at humidifier inlet. Also, it decreases as increasing cooling water flow rate while the ratio of the mass of water to air achieves the highest productivity and gained output ratio (GOR). The achieved mass ratio (MR) is 4.5 and the mass flow rate of air is 0.8 kg/min.

Forced Convection Condensation of Steam on a Small Bank of Horizontal Tubes

1992 ◽  
Vol 114 (3) ◽  
pp. 708-713 ◽  
Author(s):  
A. G. Michael ◽  
W. C. Lee ◽  
J. W. Rose
Keyword(s):  
Heat Transfer ◽  
Water Flow Rate ◽  
Cooling Water ◽  
Transfer Coefficients ◽  
Cross Sectional ◽  
Small Bank ◽  
Heat Transfer Coefficients ◽  
Horizontal Tubes ◽  
Cooling Water Flow Rate ◽  
In Series

Heat transfer measurements are reported for condensation of steam flowing vertically downward over a small bank of staggered horizontal tubes having 10 rows with 4 and 3 tubes per row. The tubes in each row were connected in series and separately supplied with cooling water. The cooling water flow rate and temperature rise were measured individually for each row and tube-wall temperatures were measured on selected tubes. Data were obtained at slightly above atmospheric pressure and the range of steam approach velocity (based on the cross-sectional area of the duct) was 6 to 23 m/s. A general trend of decreasing heat transfer coefficient with depth in the bank was found. However, superimposed on this was a “saw-tooth” effect with the three-tube rows having higher coefficients than the rows with four tubes. The amplitude of the coefficient variation decreased down the bank and was also less pronounced at lower vapor velocities. When compared with other experimental data for condensation of steam on small staggered banks, the present data exhibit somewhat higher vapor-side, heat transfer coefficients.

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