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Shell and Tube Heat exchanger thermal rating with HTRI
WEBVTT Kind: captions Language: en
00:00:00.089 hello guys welcome to my youtube channel 00:00:03.47000:00:03.480 Nick Lee and her beauty I also had a 00:00:07.07000:00:07.080 dinner ok today I'm gonna explain how to 00:00:10.19000:00:10.200 DJ in Sharon to heat exchanger we call 00:00:13.64000:00:13.650 it thermal rating I would like to 00:00:16.76000:00:16.770 explain shell and tube heat exchanger 00:00:20.26900:00:20.279 well then I've done design in my past 00:00:23.84000:00:23.850 project inside the regeneration 00:00:26.00000:00:26.010 packaging so you can see a glyco 00:00:29.39000:00:29.400 contactor and we have a shell and tube 00:00:31.93900:00:31.949 heat exchanger this left side link 00:00:35.56900:00:35.579 glycol and Q side is dry gas dry gas and 00:00:41.03000:00:41.040 this hot fluid is Lin TG so we can cool 00:00:48.17000:00:48.180 down the dry gas by means of this hot 00:00:52.70000:00:52.710 link eg okay so this linkage the flow 00:00:58.31000:00:58.320 rate is this much 9000 something kg per 00:01:03.08000:01:03.090 hour and the inlet temperature is 90 00:01:06.80000:01:06.810 tooth degree Celsius and on the 00:01:10.31000:01:10.320 temperature is 66 point six degrees 00:01:13.39900:01:13.409 ashes and dry gas temperature is 58 00:01:17.35900:01:17.369 point two four degrees Celsius and our 00:01:20.57000:01:20.580 net is ninety fifty nine point two 00:01:25.09000:01:25.100 degrees dashes usually we use h ta for a 00:01:31.46000:01:31.470 formulating of course you can use the 00:01:33.67900:01:33.689 HDFS inside the hashes but in my opinion 00:01:37.27000:01:37.280 HR I provided you with more optimized 00:01:41.14900:01:41.159 design than HDFS it's just my opinion 00:01:44.78000:01:44.790 because before I compared the results 00:01:48.46000:01:48.470 done by hgri and HDFS and then Oh 00:01:52.63900:01:52.649 even though or process parameter is the 00:01:55.49000:01:55.500 same but the result done by H Tara is 00:01:59.66000:01:59.670 more optimized small smaller than one 00:02:03.10900:02:03.119 that HDFS so I prefer using HTF for 00:02:08.24000:02:08.250 emulating 00:02:09.16900:02:09.179 so we need to design this Shannon 00:02:12.61900:02:12.629 typically change 00:02:13.44900:02:13.459 suicide is linked eg and called to 00:02:18.06900:02:18.079 status in natural gas strike ass so her 00:02:21.25000:02:21.260 side is Lin TJ and cold side is natural 00:02:23.89000:02:23.900 gas okay so we know the temperature in 00:02:27.67000:02:27.680 the temperature has side in a 00:02:29.70900:02:29.719 temperature aside on the temperature 00:02:31.56900:02:31.579 cooler side in the temperature call 00:02:33.58000:02:33.590 decide on the temperature right okay 00:02:37.33000:02:37.340 the region that I explained about manual 00:02:41.67900:02:41.689 calculation for this heat exchanger 00:02:44.22900:02:44.239 thermal rating if you don't know about 00:02:47.22000:02:47.230 calculation inside the software maybe it 00:02:50.94900:02:50.959 will take long time for you to optimize 00:02:54.64000:02:54.650 and train an error calculation but if 00:02:59.37900:02:59.389 you know the software how to calculate 00:03:01.80900:03:01.819 inside and then you can finish you can 00:03:05.25900:03:05.269 optimize faster so I would like to 00:03:08.25900:03:08.269 explain how to calculate manually so I 00:03:12.33900:03:12.349 think it's good for your understanding 00:03:17.43000:03:17.440 okay first step hematite hematite there 00:03:21.84900:03:21.859 are tons of Tama types for example PE u 00:03:25.86000:03:25.870 PE m ty many things so for this heat 00:03:31.65900:03:31.669 exchanger I have experience so normally 00:03:35.74000:03:35.750 I propose some she you type or B you tie 00:03:41.39900:03:41.409 to a client space on our experience we 00:03:45.67000:03:45.680 can propose based on the process fluid 00:03:50.11000:03:50.120 may be a process fluid is a toxic you 00:03:52.99000:03:53.000 have to propose some less liquidy points 00:03:56.86000:03:56.870 typed Amitai or you need to consider the 00:04:01.30000:04:01.310 mechanical cleaning chemical cleaning 00:04:03.06900:04:03.079 and maintenance you can discuss it with 00:04:06.24900:04:06.259 a client and then you can check the spec 00:04:08.67900:04:08.689 requirements some spec requirement don't 00:04:11.25900:04:11.269 allow some specific Tama type like F 00:04:15.74900:04:15.759 type so you need to check the spec 00:04:19.96000:04:19.970 requirement and then you need to discuss 00:04:22.00000:04:22.010 with client maybe client that they have 00:04:24.85000:04:24.860 some there 00:04:26.15900:04:26.169 preferred design all if they don't have 00:04:29.85000:04:29.860 any preferred design or they don't have 00:04:33.65900:04:33.669 any experience you can propose okay the 00:04:36.45000:04:36.460 important thing that you have to check 00:04:38.79000:04:38.800 is a fouling factor fouling factor 00:04:41.30000:04:41.310 funneling factor normally the Sharon 00:04:44.58000:04:44.590 cube was specification they mentioned 00:04:47.55000:04:47.560 specify the filing factor for fluid or 00:04:52.15900:04:52.169 service so this project they mentioned 00:04:58.20000:04:58.210 the filing factor for glycol and guess 00:05:02.01000:05:02.020 like this much so we have to follow this 00:05:08.51900:05:08.529 falling factor right and Cuba to pattern 00:05:13.92000:05:13.930 also maybe it depends on the mechanical 00:05:17.07000:05:17.080 climbing if they don't have any specific 00:05:19.86000:05:19.870 requirements as a package vendor we can 00:05:22.76000:05:22.770 propose all we can recommend 45-degree 00:05:27.05900:05:27.069 or tray triangle pattern like there and 00:05:32.51000:05:32.520 tube OD also there is some spec 00:05:36.74900:05:36.759 requirement or there is no spectra 00:05:39.32900:05:39.339 karremans so if there is no spectra 00:05:42.95900:05:42.969 comment for minimum ID 42 you can 00:05:47.24900:05:47.259 propose like that or three-quarter inch 00:05:50.18900:05:50.199 II like them just for example this 00:05:53.20900:05:53.219 sharon tube i chose 20 just one each one 00:05:59.63900:05:59.649 each to bow OD and one thing that you 00:06:04.49900:06:04.509 have to check is over design at the time 00:06:07.61900:06:07.629 fouling factor 00:06:08.68900:06:08.699 sometimes spec requirement say 10 00:06:11.73000:06:11.740 percent did you imagine on the flow rate 00:06:14.18900:06:14.199 or heat duty or some spec mention over 00:06:21.20900:06:21.219 design should be put on the surface area 00:06:25.52900:06:25.539 10 percent over tea time and the surface 00:06:28.07900:06:28.089 area like this so you need to check the 00:06:30.30000:06:30.310 spec requirement the first filing factor 00:06:33.24000:06:33.250 over the giant or a minimum 00:06:36.75000:06:36.760 to ID or to pattern you need to check so 00:06:41.65000:06:41.660 you have to follow okay then we have to 00:06:44.85000:06:44.860 determine how many passes for each side 00:06:48.19000:06:48.200 are required like a tube side how many 00:06:51.43000:06:51.440 pass or share side how many passes 00:06:53.86000:06:53.870 record a G already you know if there is 00:06:58.24000:06:58.250 a co-current flow and counter current 00:07:00.70000:07:00.710 flow we cannot use air MTD so we have to 00:07:07.51000:07:07.520 use our MTD x ft correctly the factor 00:07:13.69000:07:13.700 for the temperature if there is a 00:07:16.27000:07:16.280 current flow and counter current flow we 00:07:21.07000:07:21.080 can use this graph so we can check we 00:07:26.14000:07:26.150 can know the ft so this is a 1 shall 00:07:33.73000:07:33.740 pass two or more to pass graph so we can 00:07:37.99000:07:38.000 obtain this temperature difference 00:07:40.27000:07:40.280 factor ft we can get this R and s they 00:07:47.35000:07:47.360 some hot high temperature and cold say 00:07:50.62000:07:50.630 temperature so based on this temperature 00:07:55.93000:07:55.940 equation we can get this s and R and 00:07:59.62000:07:59.630 then we can get this F T so this f th 00:08:05.56000:08:05.570 should be higher than 0.8 if this F T 00:08:10.17000:08:10.180 less than 0.8 we have to find another 00:08:13.36000:08:13.370 sorry another pass maybe for pass you to 00:08:18.16000:08:18.170 pass or more to surpass because there 00:08:22.03000:08:22.040 are another this graph depends on the 00:08:25.36000:08:25.370 discus and to pass so you need to find 00:08:30.13000:08:30.140 how many passes for each side are 00:08:33.07000:08:33.080 required based on this T ft is if the F 00:08:39.46000:08:39.470 T is less than 0.8 that means the 00:08:41.68000:08:41.690 efficiency is very low so you have to 00:08:44.65000:08:44.660 increase the ft okay so we can 00:08:50.68000:08:50.690 determine the path so in this case we 00:08:54.74000:08:54.750 can determine society's one pass to 00:09:00.50000:09:00.510 Saudis to passes so we can recommend to 00:09:06.64000:09:06.650 client okay 00:09:08.48000:09:08.490 we would like to use GE she you type 00:09:12.91000:09:12.920 like this you know this video field 00:09:19.40000:09:19.410 equation right this surface area and 00:09:21.95000:09:21.960 this is a hip flow and this is 00:09:26.26000:09:26.270 coefficient of heat transfer design this 00:09:30.53000:09:30.540 T is design and the delta T is our MTD x 00:09:35.45000:09:35.460 ft corrected a temperature difference so 00:09:40.25000:09:40.260 first we have to assume this coefficient 00:09:44.00000:09:44.010 design coefficient you can assume this 00:09:49.12000:09:49.130 design coefficient based on this table 00:09:52.67000:09:52.680 like the organics or heavy organics 00:09:56.72000:09:56.730 because our hot fluid is TG and then 00:10:03.08000:10:03.090 cold sighs gasps so we can just overall 00:10:06.89000:10:06.900 design coefficient 10 to 14 so I just 00:10:13.19000:10:13.200 assume 14 14 okay so we know this heat 00:10:19.73000:10:19.740 flow right 00:10:20.72000:10:20.730 he flow is a mass flow rate multiplied 00:10:23.87000:10:23.880 heat capacity multiplied by temperature 00:10:27.38000:10:27.390 difference okay so heat flow of the hot 00:10:31.58000:10:31.590 side is the same as the hip flow of the 00:10:34.40000:10:34.410 cold side right so we can calculate this 00:10:37.22000:10:37.230 heat flow then we assume this on 14 00:10:40.34000:10:40.350 right 14 here and then we can calculate 00:10:44.45000:10:44.460 our MTD multiplied or corrected and MTD 00:10:48.20000:10:48.210 right MTD then we can calculate surface 00:10:52.76000:10:52.770 area okay so we can calculate this 00:10:57.35000:10:57.360 surface area recall the surface area for 00:10:59.78000:10:59.790 this heat flow based on this awesome 00:11:03.23000:11:03.240 Co efficient design 206 square feet we 00:11:07.40000:11:07.410 need right and then based on this table 00:11:12.05000:11:12.060 we can know the surface area per feet 00:11:16.69000:11:16.700 so our two bodies one inch right we we 00:11:22.49000:11:22.500 just determined it is Vonage right so 00:11:25.45000:11:25.460 one inch and this is surface area square 00:11:34.85000:11:34.860 feet so this means the tooth one feet 00:11:44.05000:11:44.060 this surface area zero point two six one 00:11:48.80000:11:48.810 five square feet right and then we can 00:11:57.76000:11:57.770 get this number of the tooth we can 00:12:04.90000:12:04.910 divide by this surface area and you can 00:12:08.54000:12:08.550 get the tube number so 206 square feet 00:12:14.39000:12:14.400 divided by this much of this area ah 00:12:18.68000:12:18.690 before that we just assume this to be 00:12:22.61000:12:22.620 length first just awesome maybe we need 00:12:27.31000:12:27.320 this space so we need to put this heat 00:12:30.92000:12:30.930 exchanger so we can assume okay 00:12:34.73000:12:34.740 our tube lengths supposed to be a six 00:12:37.91000:12:37.920 point five feet and you can start phone 00:12:41.24000:12:41.250 stats from this tube length so you can 00:12:44.75000:12:44.760 put this one and then any way you can 00:12:47.36000:12:47.370 get this number of the tube 121 tubes we 00:12:51.74000:12:51.750 need based on these 206 square feet then 00:12:58.16000:12:58.170 for this table we can get the shell ID 00:13:04.21000:13:04.220 how to know okay let's check okay one 00:13:07.79000:13:07.800 inch OD right oho D and our for example 00:13:12.38000:13:12.390 we will go with triangular pitch 00:13:15.85000:13:15.860 triangular pitch like this right then 00:13:21.25000:13:21.260 how many cube numbers we need 121 right 00:13:25.57000:13:25.580 so we can choose a similar number we can 00:13:29.88900:13:29.899 choose this number 9 this one is to pass 00:13:34.80000:13:34.810 to past if this much right and then we 00:13:39.63900:13:39.649 can know this shell ID this is social ID 00:13:44.25900:13:44.269 right so based on this one the to pass 00:13:50.65000:13:50.660 to pass right and then to me number 120 00:13:55.59000:13:55.600 150 to then with this number of the 00:13:59.59000:13:59.600 tooth we can put the shell ID 19 inch so 00:14:08.50000:14:08.510 we know now MTD and Q and a we can 00:14:15.75900:14:15.769 calculate the a again based on this one 00:14:17.98000:14:17.990 right based on cube number 152 and shall 00:14:25.87000:14:25.880 ID 19 inch name based on this one we can 00:14:32.11000:14:32.120 calculate again the surface area and 00:14:35.35000:14:35.360 then based on this one we can know 00:14:38.37000:14:38.380 surface area MTD Q then we can pack a 00:14:42.25000:14:42.260 plate the coefficients this design and 00:14:49.78000:14:49.790 then we can compare because we assumed 00:14:53.35000:14:53.360 this 40 right then we can compare this 00:14:56.56000:14:56.570 one then next we have to check pressure 00:15:03.73000:15:03.740 drop of course I didn't mention when you 00:15:09.49000:15:09.500 check the spec we have to check filing 00:15:12.04000:15:12.050 factor over design or and this kind of 00:15:15.81900:15:15.829 table minimum requirements 00:15:18.04000:15:18.050 I do D or 2 pattern also we need to 00:15:21.51900:15:21.529 check the pressure drop allow fresh trap 00:15:26.46000:15:26.470 if you look at this one I mentioned this 00:15:28.68000:15:28.690 one cube side allowable pressure drop is 00:15:31.46000:15:31.470 0.03 so this person drops to not exceed 00:15:37.49000:15:37.500 0.03 00:15:38.67000:15:38.680 this is requirement based on hydro 00:15:41.04000:15:41.050 calculation and for the cube side for 00:15:45.12000:15:45.130 gas side the pressure drop is 0.5 Wow 00:15:48.27000:15:48.280 so we need to meet this requirement 00:15:50.03000:15:50.040 right so we assumed this coefficient 00:15:56.79000:15:56.800 design and based on this one we 00:15:59.99000:16:00.000 calculated the shell ID and Q length and 00:16:03.78000:16:03.790 the number of the tubes right based on 00:16:06.36000:16:06.370 this information we have to calculate 00:16:08.01000:16:08.020 this tube side the pressure drop based 00:16:11.13000:16:11.140 on this equation this is just no more a 00:16:15.48000:16:15.490 pressure drop across the tube side and 00:16:17.37000:16:17.380 this one is the change of the traction 00:16:20.28000:16:20.290 introduced on additional pressure drop 00:16:22.95000:16:22.960 so the total pressure drop is this much 00:16:26.64000:16:26.650 Plus this much and we need to calculate 00:16:29.25000:16:29.260 also share side pressure drop preside 00:16:32.73000:16:32.740 the pressure drop equation this one so 00:16:35.13000:16:35.140 we can calculate manually by hand okay 00:16:41.63000:16:41.640 so I will summarize the step first 00:16:45.81000:16:45.820 assume the coefficient of the heat 00:16:48.21000:16:48.220 transfer this one then based on this one 00:16:52.67000:16:52.680 we can calculate this surface area 00:16:56.01000:16:56.020 recall the surface area we can calculate 00:16:59.22000:16:59.230 the the number of the tubes right based 00:17:03.18000:17:03.190 on this area right and then we can 00:17:05.64000:17:05.650 obtain the shell ID with this table 00:17:09.24000:17:09.250 right shall I do we can obtain easily 00:17:15.66000:17:15.670 right we do need to put like anger it's 00:17:21.30000:17:21.310 very difficult to write if you do this 00:17:23.79000:17:23.800 one 00:17:24.24000:17:24.250 CalFire it takes long time so you need 00:17:27.09000:17:27.100 to use this table and then you can get 00:17:29.42000:17:29.430 the shell ID easily based on this tube 00:17:32.40000:17:32.410 number and this tube patterns right 00:17:38.36000:17:38.370 okay now you can get the shrill idea and 00:17:42.90000:17:42.910 then you have the backlit this 00:17:46.46000:17:46.470 coefficient again calculate a new 00:17:49.25000:17:49.260 coefficient again based on new size 00:17:52.08000:17:52.090 right shall I do now you know shall ID 00:17:55.53000:17:55.540 and tooth number numbers right so you 00:18:01.02000:18:01.030 can calculate this one and then also 00:18:03.12000:18:03.130 calculate the pressure drop is on this 00:18:05.07000:18:05.080 size then with the furia equation you 00:18:11.64000:18:11.650 can calculate Delta factor and you have 00:18:17.73000:18:17.740 to compare this study factor to hourly 00:18:21.72000:18:21.730 call the dot factor as I told you we 00:18:25.68000:18:25.690 need to check this study factor i our he 00:18:29.40000:18:29.410 returned to design meet this third 00:18:31.14000:18:31.150 factor 00:18:38.27000:18:38.280 okay based on this calculation we can 00:18:40.43000:18:40.440 calculate a dart factor right and then 00:18:43.43000:18:43.440 we can compare the recorded of the 00:18:45.20000:18:45.210 factor if this Ricardo dot vector is 00:18:48.92000:18:48.930 bigger than chocolate art factor we have 00:18:51.74000:18:51.750 to decrease the this.ud previously we 00:18:57.38000:18:57.390 assumed 14 and then we need to reduce 00:19:01.10000:19:01.110 like a 30 for example and then we have 00:19:04.16000:19:04.170 to calculate our gain 00:19:05.27000:19:05.280 if you decrease this coefficient from 40 00:19:10.19000:19:10.200 to the 30 that means our surface surface 00:19:14.15000:19:14.160 area should be increased right then we 00:19:18.32000:19:18.330 have to calculate again this is try on 00:19:20.86000:19:20.870 trial and error calculation finally this 00:19:26.45000:19:26.460 total factor calculate the two factor 00:19:29.03000:19:29.040 higher than because that factor and we 00:19:31.97000:19:31.980 can check to over-design check if it's 00:19:34.79000:19:34.800 all booty 10 is a higher than 10 percent 00:19:37.16000:19:37.170 it's okay right and then also if the 00:19:39.89000:19:39.900 Delta P on the tube side the side is 00:19:43.27000:19:43.280 math based on as per this design 00:19:48.32000:19:48.330 criteria and then we can go with the 00:19:52.06000:19:52.070 design and we can stop the train and 00:19:54.77000:19:54.780 articulation this is the procedure I 00:19:58.88000:19:58.890 don't know if you understand where but 00:20:02.42000:20:02.430 this is like a concept I think it's 00:20:06.11000:20:06.120 enough for you to understand this kind 00:20:08.12000:20:08.130 of step concept and then you can use the 00:20:11.48000:20:11.490 HRI 00:20:12.11000:20:12.120 okay let's do H Terek equation together 00:20:17.74000:20:17.750 okay this is the heat exchanger so this 00:20:20.87000:20:20.880 is a cube side to side gas a net right 00:20:25.22000:20:25.230 can you see Cassie net and guess on that 00:20:28.51000:20:28.520 this is a glycol Anette glycol all net 00:20:35.45000:20:35.460 [Music] 00:20:41.70000:20:41.710 Nikita changer okay okay so generate the 00:20:47.14000:20:47.150 properties and transport it down then 00:20:52.36000:20:52.370 like this so you need to put the type B 00:20:58.53900:20:58.549 II she she you time like this right so 00:21:06.58000:21:06.590 clarinet Chasse 00:21:08.47000:21:08.480 Cassie net to side so this one you can 00:21:15.73000:21:15.740 just put 200 120 101 you an ID 19-inch 00:21:27.82000:21:27.830 right 19 inches like 500 00:21:37.38000:21:37.39000:21:43.97000:21:43.980 ID is 500 lengths to meet this much 00:22:00.12000:22:00.130 and pressure drop lower jaw point 0.032 00:22:09.18000:22:09.190 side 0.5 fouling factory farming factory 00:22:20.56000:22:20.570 site Kalpana teru teru teru 3 6 2 side 00:22:26.41000:22:26.420 job one carriage f015 spacing 00:22:49.21000:22:49.220 sure cyan't reach 00:23:05.08000:23:05.090 run 00:23:09.78000:23:09.790 then if you look at this home over 00:23:11.91000:23:11.920 design is - right so you have to 00:23:14.25000:23:14.260 increase increase some surface area 00:23:17.19000:23:17.200 right also increase surface area if you 00:23:21.78000:23:21.790 delete this tube number and the H Tara 00:23:24.66000:23:24.670 will calculate the maximum tube numbers 00:23:31.04000:23:31.050 okay this now over to join 0.41 right 00:23:35.57000:23:35.580 then you you need to check the check lay 00:23:38.40000:23:38.410 till pressure drop design so to said is 00:23:41.84000:23:41.850 1.9 is higher than our a lower pressure 00:23:48.78000:23:48.790 drop so you need to increase the it6 00:24:06.25000:24:06.260 so now is decreased what's still not 00:24:09.34000:24:09.350 enough right we have to decrease more 00:24:14.40000:24:14.410 chrismole 650 00:24:29.73000:24:29.740 700 00:24:41.59000:24:41.600 if you you have over design this much so 00:24:47.46900:24:47.479 this is not to optimize the one so 00:24:50.49900:24:50.509 anyway you have to decrease this over 00:24:53.95000:24:53.960 design down to 10% but you need to make 00:24:58.33000:24:58.340 it this calculate the pressure drop 00:25:01.62900:25:01.639 below 0.5 so you have to try another 00:25:06.47900:25:06.489 calculation okay okay thank you for 00:25:14.49900:25:14.509 watching bye
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