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Heating and Cooling for Gensets - A Technical Topics Video by Cummins Power Generation
WEBVTT Kind: captions Language: en
00:00:09.290 let's take a look at ventilation design 00:00:12.02000:00:12.030 considerations I'm under than a taker 00:00:14.57000:00:14.580 sales application engineer for comments 00:00:17.02900:00:17.039 Power Generation this diagram 00:00:19.01000:00:19.020 illustrates the scientific maxim that 00:00:21.52900:00:21.539 energy can neither be created nor 00:00:23.21000:00:23.220 destroyed only converted to another form 00:00:26.45000:00:26.460 in fact electrical power generation is 00:00:29.21000:00:29.220 the conversion of some form of kinetic 00:00:31.75900:00:31.769 or chemical energy into electrical 00:00:34.25000:00:34.260 energy 00:00:34.76000:00:34.770 of course since this is a process it is 00:00:37.91000:00:37.920 less than 100 percent efficient so some 00:00:40.81900:00:40.829 of the energy 65% in this illustration 00:00:43.43000:00:43.440 is converted to thermal energy or heat 00:00:46.79000:00:46.800 rather than electrical power to make 00:00:49.63900:00:49.649 more efficient use of the available 00:00:51.41000:00:51.420 energy some way state can be recaptured 00:00:54.76000:00:54.770 combined heat and power or CHP 00:00:58.06000:00:58.070 applications make use of radiated heat 00:01:00.58000:01:00.590 but even in these applications a lot of 00:01:03.83000:01:03.840 heat is radiated to the surrounding air 00:01:06.08000:01:06.090 in fact if you have several large 00:01:09.02000:01:09.030 generator sets in one location they can 00:01:11.53900:01:11.549 create their own microclimate from the 00:01:13.96900:01:13.979 heat they give off this is important 00:01:16.46000:01:16.470 since the higher ambient temperature 00:01:18.32000:01:18.330 affects the air intake which in turn 00:01:20.45000:01:20.460 affects the generator performance so 00:01:23.12000:01:23.130 it's important to design the proper 00:01:25.03900:01:25.049 ventilation for a project which 00:01:26.92900:01:26.939 considers all four aspects keeping the 00:01:29.78000:01:29.790 combustion air at the right temperature 00:01:31.67000:01:31.680 cooling air for the alternator removing 00:01:34.88000:01:34.890 excess heat from the room if it is 00:01:36.80000:01:36.810 indoors and providing air to cool the 00:01:39.49900:01:39.509 radiator now we dive into the details of 00:01:42.74000:01:42.750 rating and classifying radiators these 00:01:45.67900:01:45.689 are the factors involved where they are 00:01:48.10900:01:48.119 installed the temperatures they are 00:01:50.35900:01:50.369 rated to handle and how those ratings 00:01:52.96900:01:52.979 are determined there are two ways to 00:01:55.39900:01:55.409 measure the performance of a cooling 00:01:57.10900:01:57.119 system ambient temperature and what's 00:02:00.26000:02:00.270 called the air encore or AOC when a 00:02:03.92000:02:03.930 cooling system is rated for ambient 00:02:05.92900:02:05.939 temperatures what is measured is the 00:02:08.21000:02:08.220 temperature of air 00:02:09.52000:02:09.530 on the inlet side of the system before 00:02:11.83000:02:11.840 it picks up heat from the alternator and 00:02:13.90000:02:13.910 the engine components this temperature 00:02:16.93000:02:16.940 is typically measured as an average of 00:02:19.39000:02:19.400 two points as shown in the diagram in 00:02:21.73000:02:21.740 the case of enclosed generator set the 00:02:24.79000:02:24.800 temperature is typically measured at the 00:02:27.07000:02:27.080 air inlet louver the AOC temperature on 00:02:30.67000:02:30.680 the other hand is measured on the face 00:02:33.01000:02:33.020 of the radiator the air flowing through 00:02:35.59000:02:35.600 the radiator is significantly warmer 00:02:37.57000:02:37.580 than the air entering the system so a OC 00:02:41.19900:02:41.209 temperatures are higher than 00:02:43.33000:02:43.340 corresponding ambient ones there is 00:02:45.67000:02:45.680 great value in designing the engine and 00:02:47.92000:02:47.930 the cooling system to work together as 00:02:50.11000:02:50.120 Commons does there are no surprises from 00:02:52.93000:02:52.940 putting an engine and a cooling system 00:02:55.00000:02:55.010 together on site for the first time 00:02:56.97000:02:56.980 loose radiators sourced separately can 00:03:00.19000:03:00.200 have temperature ratings based on 00:03:01.78000:03:01.790 different measurement methods as we have 00:03:03.94000:03:03.950 just discussed this can be very 00:03:06.00900:03:06.019 misleading 00:03:06.52000:03:06.530 in contrast comments provides cooling 00:03:09.55000:03:09.560 systems well-suited to the generators 00:03:11.50000:03:11.510 they are paired with to account for all 00:03:13.47900:03:13.489 four kinds of air requirements 00:03:15.53900:03:15.549 combustion air cooling air for the 00:03:18.10000:03:18.110 alternator room heat and air to cool the 00:03:21.10000:03:21.110 radiator here is a classic example of 00:03:24.37000:03:24.380 what can happen from a mismatch of an 00:03:26.53000:03:26.540 engine and a cooling system based on 00:03:28.66000:03:28.670 confusion about temperature readings 00:03:30.55000:03:30.560 take a factory tested John set with a 00:03:33.19000:03:33.200 cooling system rated at 50 degrees 00:03:35.22900:03:35.239 centigrade ambient but by the time the 00:03:37.42000:03:37.430 air reaches the radiator core it could 00:03:39.40000:03:39.410 easily be at 60 degrees centigrade that 00:03:41.75900:03:41.769 would be the air Encore measurement if a 00:03:45.00900:03:45.019 loose radiator is bought that has a 50 00:03:47.68000:03:47.690 degree C rating that could refer to the 00:03:50.05000:03:50.060 maximum allowable temperature at the 00:03:52.09000:03:52.100 core such a radiator would fall short 00:03:55.03000:03:55.040 and performance and may fail it is much 00:03:58.27000:03:58.280 better to have an engine and radiator 00:04:00.28000:04:00.290 designed and tested to work 00:04:02.58000:04:02.590 that's why there is great value in the 00:04:05.07000:04:05.080 kind of well documented factory testing 00:04:07.38000:04:07.390 that Cummins does such testing simulates 00:04:10.55900:04:10.569 the airflow in a typical power room and 00:04:13.38000:04:13.390 uses dedicated instruments to measure 00:04:15.96000:04:15.970 the ambient temperature at various 00:04:17.52000:04:17.530 points two other kinds of tests are also 00:04:20.69900:04:20.709 valuable a thermal cycle test which 00:04:23.76000:04:23.770 valuates radiator cores for resistance 00:04:25.98000:04:25.990 to mechanical stresses by alternating 00:04:28.05000:04:28.060 hot and cold environments and an 00:04:30.60000:04:30.610 endurance test which runs the system for 00:04:33.09000:04:33.100 an extended period of time to estimate 00:04:35.43000:04:35.440 its lifespan there is no better 00:04:37.46900:04:37.479 alternative to a tried and tested system 00:04:39.96000:04:39.970 coming straight from the factory a 00:04:41.96000:04:41.970 do-it-yourself approach to cooling 00:04:43.92000:04:43.930 systems can bring unknown risks and 00:04:46.23000:04:46.240 problems to learn more contact your 00:04:49.02000:04:49.030 local comments power generation 00:04:50.37000:04:50.380 distributor or visit WM inspire calm 00:05:01.19000:05:01.200 you
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