/ News & Press / Video / Heat Transfer Equipment - Plate Heat Exchanger

Heat Transfer Equipment - Plate Heat Exchanger

WEBVTT
Kind: captions
Language: en

00:00:01.550
good day I'm Rachel I own and Alaska and
00:00:05.390 00:00:05.400 I am going to discuss to you my design
00:00:08.600 00:00:08.610 on the heat transfer equipment
00:00:10.810 00:00:10.820 specifically a plate heat exchanger the
00:00:14.959 00:00:14.969 main objective of this project is to
00:00:17.570 00:00:17.580 design a heat transfer equipment that
00:00:20.359 00:00:20.369 will best fit milk pasteurization under
00:00:23.570 00:00:23.580 high temperature short time process this
00:00:26.870 00:00:26.880 image represents the typical heat
00:00:29.660 00:00:29.670 exchanger for milk pasteurization the
00:00:34.340 00:00:34.350 process fluid which is milk enters at 4
00:00:37.549 00:00:37.559 degrees Celsius and will then be heated
00:00:39.979 00:00:39.989 to 80 degrees Celsius under a high
00:00:43.310 00:00:43.320 temperature short time pasteurization
00:00:45.260 00:00:45.270 process what I will be used as utility
00:00:49.430 00:00:49.440 fluid which enters that 90 degrees ashes
00:00:52.580 00:00:52.590 and leaves at 65 degrees Celsius flow
00:00:57.229 00:00:57.239 rates for both milk and water are 80
00:00:59.840 00:00:59.850 thousand degrees F 150 thousand
00:01:02.510 00:01:02.520 kilograms per our respective view the
00:01:07.280 00:01:07.290 physical properties for both milk and
00:01:09.679 00:01:09.689 waters such as density viscosity and
00:01:12.890 00:01:12.900 front-end number is shown in this table
00:01:14.840 00:01:14.850 the density and viscosity of milk is
00:01:19.190 00:01:19.200 taken in an average density and
00:01:21.170 00:01:21.180 viscosity for typical milk used in
00:01:24.320 00:01:24.330 pasteurization which is 1050 kilograms
00:01:30.350 00:01:30.360 per cubic meter and point zero zero two
00:01:33.170 00:01:33.180 Pascal seconds while the density and
00:01:37.819 00:01:37.829 viscosity of water is taken under log
00:01:41.569 00:01:41.579 mean temperature difference for the
00:01:43.550 00:01:43.560 process front end number for both fluid
00:01:47.149 00:01:47.159 was completed the equipment toast for
00:01:51.139 00:01:51.149 the process of pasteurization was a
00:01:53.420 00:01:53.430 plate heat exchanger so why use plate
00:01:57.859 00:01:57.869 heat exchanger this is because of some
00:02:00.920 00:02:00.930 valid reason
00:02:03.950 00:02:03.960 first when the madea's cost for the
00:02:06.440 00:02:06.450 equipment and productions are high
00:02:08.919 00:02:08.929 clicked heat exchanger is commonly used
00:02:11.780 00:02:11.790 because it is more economical also it is
00:02:17.510 00:02:17.520 easier to maintain it can also be used
00:02:20.660 00:02:20.670 for temperatures as low as one degree
00:02:24.050 00:02:24.060 Celsius compared to five to ten degrees
00:02:27.680 00:02:27.690 Celsius for a heat for a shell and tube
00:02:30.350 00:02:30.360 heat exchanger also they are flexible
00:02:36.850 00:02:36.860 due to its easiness to add extra plates
00:02:40.420 00:02:40.430 it is also more suitable to use for
00:02:43.280 00:02:43.290 viscous materials
00:02:44.360 00:02:44.370 thus best fitted for milk which is a
00:02:47.630 00:02:47.640 viscous fluid temperature correction
00:02:51.830 00:02:51.840 factor for plate heat exchangers are
00:02:54.500 00:02:54.510 normally high as the flow drug closer to
00:02:58.310 00:02:58.320 through patrica parents set up use of it
00:03:03.680 00:03:03.690 also tend to have significantly less
00:03:06.080 00:03:06.090 fouling the material to be used in the
00:03:13.580 00:03:13.590 equipment is stainless steel
00:03:15.580 00:03:15.590 whyyou stainless steel rather than other
00:03:18.979 00:03:18.989 material this is because of some results
00:03:25.539 00:03:25.549 stainless steel are known to resist
00:03:28.130 00:03:28.140 corrosion
00:03:28.990 00:03:29.000 virtually along pooling waters and many
00:03:31.670 00:03:31.680 other chemical environments also it has
00:03:35.750 00:03:35.760 high resistance to high temperature and
00:03:38.410 00:03:38.420 maintain excellent heat transfer
00:03:41.390 00:03:41.400 properties thus suitable for the process
00:03:44.960 00:03:44.970 stated earlier stainless steel is also
00:03:49.400 00:03:49.410 resistant to following due to pollution
00:03:52.360 00:03:52.370 with no contamination of products and
00:03:55.220 00:03:55.230 process to toe volution which is highly
00:03:59.599 00:03:59.609 needed since we are dealing with food
00:04:01.729 00:04:01.739 products it is also widely available and
00:04:04.940 00:04:04.950 easy to clean with its cost cheaper
00:04:08.020 00:04:08.030 compared to other material industry
00:04:10.670 00:04:10.680 liable for long term services it is more
00:04:14.180 00:04:14.190 economical
00:04:17.569 00:04:17.579 number of transfer units will be
00:04:20.129 00:04:20.139 calculated as change in temperatures
00:04:22.850 00:04:22.860 divided by the log mean temperature
00:04:25.710 00:04:25.720 difference thus the number of transfer
00:04:29.310 00:04:29.320 units is equal to two point sixty nine
00:04:32.270 00:04:32.280 para one is to one pass arrangement the
00:04:36.000 00:04:36.010 correction factor will be equal to zero
00:04:39.330 00:04:39.340 five nine four five and a delta and the
00:04:44.550 00:04:44.560 mean temperature difference will be
00:04:46.890 00:04:46.900 equal to the correction factor
00:04:48.600 00:04:48.610 multiplied by log mean temperature
00:04:51.680 00:04:51.690 dependence and was calculated us twenty
00:04:55.200 00:04:55.210 six point sixty five degree Celsius
00:05:01.310 00:05:01.320 figure 12 point sixty four shows the log
00:05:07.320 00:05:07.330 mean temperature correction factor for
00:05:09.300 00:05:09.310 plate heat exchanger with the use of the
00:05:13.980 00:05:13.990 calculated number of transfer unit 2.69
00:05:17.879 00:05:17.889 and projecting it to one is to one pass
00:05:22.190 00:05:22.200 correction factor was obtained and this
00:05:26.460 00:05:26.470 step this table shows the overall heat
00:05:30.120 00:05:30.130 transfer coefficient thus using this we
00:05:33.719 00:05:33.729 can estimate the overall heat transfer
00:05:35.340 00:05:35.350 coefficient for the equipment area
00:05:39.920 00:05:39.930 required will be calculated as 2 divided
00:05:43.469 00:05:43.479 by overall heat transfer coefficient
00:05:46.070 00:05:46.080 multiplied by correction factor x log
00:05:51.270 00:05:51.280 mean temperature difference the area
00:05:54.450 00:05:54.460 required would be equal to sixty three
00:05:56.640 00:05:56.650 point zero four square meters for the
00:06:00.540 00:06:00.550 effective plate area it will be equal to
00:06:03.480 00:06:03.490 length of clay multiplied by its width
00:06:06.630 00:06:06.640 which is equal to one point five times
00:06:10.320 00:06:10.330 zero point five the effective plate area
00:06:13.560 00:06:13.570 will then
00:06:15.270 00:06:15.280 be equal to 0.75 square meters the
00:06:21.120 00:06:21.130 number of clip will be calculated as
00:06:23.670 00:06:23.680 total heat transfer area divided by the
00:06:26.340 00:06:26.350 effective area thus the total number of
00:06:29.430 00:06:29.440 plates where the equipment was 84 plates
00:06:33.260 00:06:33.270 which will be adjusted to 85 to
00:06:37.680 00:06:37.690 calculate the number of channels it will
00:06:40.230 00:06:40.240 be equal to the number of plates minus
00:06:43.129 00:06:43.139 1/2 thus the total number of channels
00:06:47.460 00:06:47.470 was 42 channels per pass the channel
00:06:53.580 00:06:53.590 cross sectional area will be equal to
00:06:55.860 00:06:55.870 the plate spacing multiplied by this
00:06:58.080 00:06:58.090 plate with we bleed spacing of 3
00:07:04.170 00:07:04.180 millimeters the channel carsick cross
00:07:06.960 00:07:06.970 sectional area will be equal to point
00:07:09.630 00:07:09.640 zero zero and five square meters the
00:07:13.350 00:07:13.360 hydraulic mean diameter will be equal to
00:07:16.350 00:07:16.360 2 multiplied by P specie thus the
00:07:21.900 00:07:21.910 hydraulic mean diameter is equal to 6
00:07:24.270 00:07:24.280 times a to the negative 3 meters for the
00:07:28.200 00:07:28.210 channel velocity of me it will be
00:07:31.430 00:07:31.440 calculated as Omega divided by the
00:07:34.020 00:07:34.030 density times the area of the per
00:07:38.460 00:07:38.470 channel multiplied by the number of
00:07:40.560 00:07:40.570 channels yes the channel velocity
00:07:43.890 00:07:43.900 formula cost 0.35 meters per second with
00:07:47.370 00:07:47.380 the reynolds number of 1071 and now such
00:07:52.260 00:07:52.270 number of 70 1.06 the calculated film
00:07:58.200 00:07:58.210 heat transfer coefficient was 6150 8.53
00:08:02.730 00:08:02.740 watts per meter square degree sessions
00:08:05.690 00:08:05.700 for water the channel velocity
00:08:08.909 00:08:08.919 calculated was 0.66 meters per seconds
00:08:12.330 00:08:12.340 with the reynolds number of 4769 point
00:08:17.430 00:08:17.440 54
00:08:19.040 00:08:19.050 and then assets number of 120 9.30 group
00:08:23.200 00:08:23.210 the film heat transfer coefficient was
00:08:26.839 00:08:26.849 calculated - twelve thousand nine
00:08:29.510 00:08:29.520 hundred thirty one point sixty three
00:08:31.550 00:08:31.560 watts per meter square degree Celsius
00:08:36.940 00:08:36.950 they would call point nine shows the
00:08:40.610 00:08:40.620 following factors coefficient typical
00:08:43.339 00:08:43.349 values for plate heat exchangers well
00:08:48.410 00:08:48.420 table both point two shows the following
00:08:53.060 00:08:53.070 factor coefficients typical value for
00:08:56.060 00:08:56.070 five various fluids the overall
00:09:01.940 00:09:01.950 coefficient was calculated using the
00:09:04.730 00:09:04.740 equation shown and was computed as 1919
00:09:10.220 00:09:10.230 point line was per meter square degree
00:09:12.980 00:09:12.990 Celsius since too low from the
00:09:16.490 00:09:16.500 Assumption decreased number of channels
00:09:19.610 00:09:19.620 per pass to the deep recalculating the
00:09:24.440 00:09:24.450 milk channel velocity is calculated as
00:09:27.769 00:09:27.779 zero point seven one four meters per
00:09:30.650 00:09:30.660 seconds with the reynolds number of 3373
00:09:35.090 00:09:35.100 point sixty five the film heat transfer
00:09:39.079 00:09:39.089 coefficient is equal to twelve thousand
00:09:41.690 00:09:41.700 nine hundred eighty two point ninety two
00:09:43.970 00:09:43.980 watts per meter square degree celsius
00:09:47.590 00:09:47.600 the water channel velocity was
00:09:50.930 00:09:50.940 calculated Alice one point three eight
00:09:53.630 00:09:53.640 six meters per seconds with the Reynolds
00:09:56.990 00:09:57.000 number of ten thousand sixteen point
00:09:59.780 00:09:59.790 three thirty four and the film heat
00:10:02.960 00:10:02.970 transfer coefficient of twenty thousand
00:10:05.569 00:10:05.579 nine hundred thirty one point 33 watts
00:10:08.930 00:10:08.940 per meter square degree Celsius now
00:10:12.500 00:10:12.510 calculated overall heat transfer
00:10:14.150 00:10:14.160 coefficient was two thousand four
00:10:16.880 00:10:16.890 hundred fifty point eighty since it was
00:10:21.269 00:10:21.279 near or almost the same as the assumed
00:10:26.069 00:10:26.079 value of overall heat transfer
00:10:27.749 00:10:27.759 coefficient that's the assumption of 30
00:10:31.710 00:10:31.720 channels purpose was a forum for mute
00:10:37.939 00:10:37.949 JFS equal to 0.6 multiplied by the
00:10:41.309 00:10:41.319 Reynard sombre briefs to negative zero
00:10:44.129 00:10:44.139 point three JFS equal to 0.05 which will
00:10:49.110 00:10:49.120 be used to calculate the total pressure
00:10:51.660 00:10:51.670 drop for milk the total pressure drop
00:10:54.949 00:10:54.959 calculated was thirty thousand four
00:10:57.990 00:10:58.000 hundred forty two point fifty four for
00:11:00.990 00:11:01.000 water the alkylated total pressure drop
00:11:04.490 00:11:04.500 was seventy four thousand two hundred
00:11:08.059 00:11:08.069 forty-seven for in ninety five Pascal
00:11:12.740 00:11:12.750 for the actual specification of the
00:11:15.389 00:11:15.399 equipment number of channels will be
00:11:19.410 00:11:19.420 equal to the number of plates minus 1/2
00:11:23.150 00:11:23.160 with an assumption of 30 channels number
00:11:27.900 00:11:27.910 of plates was calculated as 41 using
00:11:32.879 00:11:32.889 this total heat transfer area will be
00:11:35.999 00:11:36.009 calculated with an effective area of
00:11:39.139 00:11:39.149 0.75 square meters the total heat
00:11:42.449 00:11:42.459 transfer area is equal to thirty point
00:11:45.420 00:11:45.430 75 square meters for total heat for the
00:11:51.299 00:11:51.309 equipment total area will be multiplied
00:11:55.290 00:11:55.300 to the overall heat transfer coefficient
00:11:57.559 00:11:57.569 the correction factor in the log mean
00:12:01.079 00:12:01.089 temperature difference
00:12:02.900 00:12:02.910 thus the heat required or the Duty for
00:12:06.689 00:12:06.699 the equipment was 2008 kilowatts as a
00:12:13.379 00:12:13.389 summary the specification for the
00:12:16.319 00:12:16.329 equipment are as follows the Duty is
00:12:20.759 00:12:20.769 equal to two thousand eight kilowatts
00:12:24.629 00:12:24.639 using a stainless steel material for the
00:12:27.460 00:12:27.470 equipment with the 1 is to 1 as
00:12:30.249 00:12:30.259 arrangement the page specification will
00:12:35.499 00:12:35.509 have a length of 1.5 metres a width of
00:12:38.829 00:12:38.839 0.5 meters and plate spacing of 3
00:12:43.509 00:12:43.519 millimeters the hydraulic diameter is
00:12:47.800 00:12:47.810 equal to 6 millimeters with the number
00:12:53.439 00:12:53.449 of passes equals to 1 with a total
00:12:56.710 00:12:56.720 number of plates of 41 and the number of
00:12:59.590 00:12:59.600 channels of 24 my design the figure
00:13:08.559 00:13:08.569 shows the design for the plate heat
00:13:10.629 00:13:10.639 exchanger where in this one is the fixed
00:13:16.840 00:13:16.850 plate and the plate package
00:13:25.440 00:13:25.450 a pressure plate also will have an upper
00:13:31.440 00:13:31.450 plate guide in the lower plate guide and
00:13:38.160 00:13:38.170 support and lastly the clamping bolts
00:13:41.460 00:13:41.470 and nuts thank you

Sales phone