TW200945741A - Structure for reducing temperature of cooling water and enhancing unit efficiency for generator - Google Patents

Abstract

The invention relates to a structure for reducing temperature of cooling water and enhancing unit efficiency for generators. The structure comprises a generator cooling system and a heat recycling boiler feed-water system. The generator cooling system has several generator coolers and at least one lubricant cooler. A generator enforcing cooling fan set is installed in front of the system. The heat recycling boiler feed-water system has a Gram heat exchanger and an outfall heat exchanger. A heat exchanging device is disposed in between the generator cooling system and the heat recycling feed-water system for performing heat exchange between the cooling water of the generator cooling system and the feed-water of the heat recycling boiler in the heat exchanging device and then outputting the heat.

Description

200945741 IX. Description of the invention: [Technical field of invention] Rate (4) (4) - Reduce the cost of cooling water to increase the efficiency of the unit Especially refers to a structure in which heat is exchanged by the cooling water of the generator and the feed water of the heat recovery steel furnace. [Prior Art] As shown in Figure 3, it is a conventional generator cooling water system. As shown in the figure, the cooling water system of the motor is driven by a cooling fan to make the air _ < and & Cooling water for heat exchange, forced cooling in the cooling tube =, 'As can be seen from the information in Annex 1, f is cooled by generator cooling water: temperature is 46eC (lGQ kg / s) (design value is 42. 〇 down 43<t (set s ten value is 37eC), the cooling water is used to cool the generator's lubricating oil and air. However, the 'fan cooling system' cooling effect due to fin aging and blockage. Decrease 'cause cooling water inlet and outlet temperature Compared with the design value, the technology and 6 C ' are respectively increased, and the use of a cooling fan to cool the cooling water requires a large amount of electric power, and the relative cost of electricity is increased. In addition, please refer to Fig. 4, which is a conventional heat recovery boiler feed. The water system 'flow chart' can be seen from the figure. The condensate pump outlet gives the example of the water heater of the Grand Heat Exchanger. The backwater boiler feed water tank recirculates some of the high temperature feed water to make it enter the grid heat exchanger. Feed water can be raised in advance, by It can be seen that the feed water concentration before mixing is 39.5eC, which can reach 65°C after mixing, and this temperature difference still has improved and the slaves are closer to each other. Therefore, how to reduce the generator cooling water The electricity required for cooling can be used to increase the feed water temperature before the high temperature feed water from the steel stove water tank is mixed in 5 200945741, so that the feed water flowing back from the boiler feed water tank can be relatively reduced to reduce the load of the condensed water. Increasing the amount of power generation is the focus of the present invention. SUMMARY OF THE INVENTION The main object of the present invention is to solve the above problems and provide a structure for reducing the efficiency of the cooling water of the generator to improve the efficiency of the unit, by the generator cooling system. There is a heat exchange device between the heat recovery steel furnace feed water system, and the cooling water for the generator cooling system and the heat recovery boiler feed water are exchanged in the heat exchange _ device, so the cooling water is not cooled. It needs to be cooled by the forced cooling fan of the generator. Compared with the conventional cooling system, it will not cause problems such as aging and clogging of the cooler, which can affect the cooling efficiency, and can generate electricity. The cooling system saves the electricity required for the forced cooling fan unit of the generator, and further increases the feed water temperature to reduce the load of the condensate circulation pump before the hot water of the heat recovery boiler feeds the hot water in the mixing boiler feed water tank. In view of the foregoing, the present invention comprises: a generator cold-supplied system having a plurality of generator coolers for cooling/water circulation cooling and having at least one cooling water: cooling of the lubricating oil of the ring cooling A generator forced cooling fan group is disposed at the front end of the cooling water inlet of the generator cooler and the lubricating oil cooler, and a control valve for controlling the circulation of the cooling water is disposed at the front end of the fan group. The water system 'has at least one condensed fruit that provides feed water to the heat recovery steel market'. The condensed water chestnut feed water outlet is connected to a Glue heat exchanger for feed water preheating. The water discharge heat exchanger is supplied with water to the heat recovery boiler after preheating. 6 200945741 A heat exchange device for heat exchange between generator cooling water and heat recovery boiler feed water is provided between a generator cooling system and a heat recovery boiler feed water system, and the heat exchange device includes a communication between the two cooling units Between the controller and the control valve = a cooling water inlet, a cooling water outlet connected between the forced cooling fan group of the generator and the second heater, and the heat exchange device is respectively disposed in front of the condensate pump to the drain heat exchanger Between the water inlet and the water outlet. By this, the cooling water and the feed water exchange heat in the heat exchange device, and the cooling water is cooled to an appropriate temperature before entering the two coolers for cooling, and the feed water enters the Glan heat exchanger. Preheat to the appropriate temperature beforehand. The above and other objects and advantages of the present invention will become more apparent from the detailed description and the appended claims. Of course, the invention may be varied on certain components, or in the arrangement of the components, but the selected embodiments are described in detail in the specification and their construction is shown in the drawings. [Embodiment] ❹ Please refer to Fig. 1 to Fig. 2, which shows the structure of the embodiment selected for the present invention. 'This is for illustrative purposes only, and is not limited by this structure in patent application. The embodiment provides a structure for reducing the efficiency of the generator cooling water temperature raising unit, which comprises: a generator cooling system 1 having a number of generator coolers 1 1 'the number of generator coolers 1 1 using cooling water circulation to cool down (in this embodiment: there are four seats), the generator cooling system 1 has another 7 200945741 has at least one lubricating oil cooler 12 (in this embodiment, a), the lubricating oil cooler 12 is also cooled by the cooling water circulation. A generator forced cooling fan group 13' is provided at the front end of the cooling water inlet of the generator cooler 11 and the lubricating oil cooler 12 for cooling via the generator cooler 1 1 and the lubricating oil cooler 1 2 Cooling water flowing out after heat exchange. In addition, a control valve 14 is provided at the front end of the fan unit 13 for controlling the flow of cooling water to the generator forced cooling fan group 13. In this embodiment, the generator forced cooling fan group 13 includes four motor-driven cooling fans 1 31, and each of the cooling fans 1 3 1 具有 has four driving motors 1 3 2 to drive the cooling fan 1 3 1 operation. a heat recovery steel furnace feed water system 2, which has at least one condensed water chestnut 2 1 '俾 for feeding water to the heat recovery boiler 22, wherein the condensate water pump 2 1 feed water outlet is connected to a gran heat exchanger 2 3 The water supply of the Grand Heat exchanger 2 3 is preheated before being sent to the heat recovery boiler 2 2 , and a water heat exchanger 24 is connected to the rear end of the Grand Heat exchanger 23 to heat the steel crucible. The feed water system 2 feed water enters the heat recovery boiler 22 after preheating. The heat exchange device 3 is configured to exchange heat between the generator cooling water and the heat recovery steel furnace 22, which is disposed between the generator cooling system 1 and the heat recovery boiler feed system 2, The heat exchange device 3 includes a cooling water inlet 31, the cooling water inlet; 31 is connected to the two coolers 1 1 and 12 flowing between the control valves 14; a cooling water outlet 3 2 'the cooling water is discharged σ 3 2 is connected to the generator forced cooling fan group 13 flowing between the two coolers 1 1 and 12; a feed water inlet 3 3 and 8 200945741 a feed water outlet 3 4 , the feed water inlet 3 3 and The feed water outlet 34 is connected between the condensate water pump 21 and the drain heat exchanger 24 . The heat exchange device 3 used in the embodiment is a plate type cooler, and the plate type cooler is provided in the cooler for heat exchange between the cooling water and the feed water for heat transfer (of course In the embodiment, one of the heat exchange types of the heat exchange system using the plate type cooler is not limited to the heat exchange type, and may also be replaced by a shell-and-tube heat exchanger or the like. Heat exchangers to achieve the same effect). In this embodiment, the Gland heat exchanger 23 is connected to the rear of the condensate water pump 21, and the feed water flows through the Gland heat exchanger 23 and then enters the feed water inlet 33 of the heat exchange device 3 (otherwise The position of the Grand Heat exchanger 2 3 can also be changed, that is, the feed water of the condensate water pump 2 1 can also flow through the feed water inlet 3 3 of the heat exchange device 3 for heat exchange, and then the feed water outlet 3 4 Flowing to the Grand Heat Exchanger 2 3 'The feed water is passed through the second heat exchange in the Grand Heat exchanger 23 and then to the line water heat exchanger (2.4). It can be seen from the above structure that the generator cooling water flows out of the two coolers 1, 12 to become a relatively high temperature cooling water, and the cooling water flows to the cooling water of the reading heat exchange device 3 (plate cooler). The inlet 3 1 and the heat exchange device 3 (plate cooler) flow through the plate (not killed in the figure) to transfer heat to the plate and then flow through the cooling water outlet 3 2, and then flow to The generator end cools the two coolers 1 1, 12. At the end of the heat recovery boiler feed water system 2, the feed water to be sent to the heat recovery boiler 2 2 first enters the feed water inlet of the heat exchange device 3 (plate cooler) and is in the heat exchange device 3 ( The plate-type cooler) flows through the plate (not shown in the circle) and transfers the heat of the cooling water absorbed by the 9 200945741 plate to the copper water, and then carries the heat of the water and then passes through the heat exchange device 3 (plate type) The feed water outlet of the cooler) flows out to the heat exchanger 2 3 for the second heat exchange, and then sent to the heat recovery boiler 2 2 for use. ° ❺ ❹ Will w ' muscle% Μ, poor, cold potassium 糸 之 cooling water from the two coolers 1 1, 12 when the heat is transferred to the heat recovery boiler 2 2 to use the feed water (The process of heat exchange can be referred to Figure 6 - Working principle of plate heat exchanger), thereby achieving the effect of heat exchange. One of the purposes is to save the cooling fan by using a generator to cool the cooling water. Group 1 3 power, in order to achieve the effect of energy saving, in addition, the use of this structure for cooling water cooling does not cause problems such as aging and blockage of the fins, which affects the cooling efficiency, so that the temperature difference of the water cooling is closer to the theoretical data; In addition, the second purpose is that, in addition to the above structure, the generator cooling system 1 can save the electricity required for the generator forced cooling fan group i 3 , and the H2 water of the heat recovery boiler can be fed in the mixed boiler. Before the high temperature feed of the water tank, increase the feed water temperature to reduce the load of the condensate circulation pump (for the actual experimental data, please refer to Appendix 1). It is worth mentioning that the cooling water with heat is discharged from the two coolers ii and 丄2, and the heat exchange device 3 (plate cooler) can be directly used for heat exchange. The control valve 4 causes the cooling water to be simultaneously cooled into the heat exchange device 3 and the forced cooling air cake i3 of the generator, so that the cooling water reaches double 4 cooling, and the temperature can be lowered more efficiently. The disclosure of the embodiments is intended to be illustrative of the invention, and is not intended to limit the invention, and the invention is intended to be in accordance with the scope of the invention. The skilled person understands that the present invention can achieve the foregoing objectives, and has already met the requirements of the Patent Law, and has filed a patent application β [Simple Description]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 2 is a schematic diagram of cooling of a fan of the present invention. FIG. 3 is a schematic diagram of a flow chart of a conventional generator cooling system. Explanation of Symbols] (Applicable part) None (part of the invention) Generator Cooling System 1 Generator Cooler 11 Lubricating Oil Cooler 12 Generator Forced Cooling Fan Set 1 Cooling Fan 131 Drive Motor 1 3 2 Control Valve 1 4 Heat Recovery Steel Furnace feed system 2 Condensate pump 2 i Heat recovery steel furnace 2 2 Grand heat exchanger 2 3 Water discharge heat exchanger 2 4 Heat exchange unit 3 Cooling water inlet 3 1 Cooling water outlet 3 2 Feed water inlet 3 3 Feed water Export 3 4 ❹

U 200945741 / Reduced South Fire #1~ About Generator Cooling Water Temperature Enhancement Unit Efficiency Improvement Results Discussion Southern Power Plant Huang Taixiong, Wang Ruihuang, Li Wenzhou, Zhang Zhixin 200945741 Improvement Concept 1. Boiler Feeding Process Introduction CEP Export Feed Water (96 kg / s, 34 ° C) first sent to the Grand Heat exchanger (Figure 3) and Granville steam for heat exchange to increase the feed water temperature; and before feeding to the boiler and condensate circulation pump The water (158 t) is mixed so that the feed water entering the boiler is 65t high to avoid dew point corrosion, because the condensate circulation pump drives the water in the feed water and then enters the feed water tank; if the feed water temperature of the CEP outlet is higher, The amount of feed water pumped by the condensate circulating pump that requires temperature adjustment is reduced. Therefore, if the feed water from the CEP outlet is sent to the new winter plate chip cooler and the generator cooling water for heat exchange, then return to the feed water line and use the Grand Heat Exchanger and the Grand Steam for another heat exchange. Increase the feed water temperature, and secondly reduce the electricity consumption in the plant. 2, generator forced cooling system MPR (Generator Forced Cooling System) generator forced cooling system (such as sleepy 2) is the use of 16 fans to cool the cooling water and atmosphere in the tube. The cooling water then cools the air and lubricating oil through four generator coolers and a lubricating oil cooler. The technical information originally designed for the forced cooling system of the generator is as follows: Maximum inlet water temperature 42〇C Maximum outlet water temperature 37〇C Operating seat force 8 bar Cooling water flow 360 m3/h Generator cooler heat exchange Dong 1,610 kw Lubrication Oil cooler heat exchange capacity 450 kw air cooler fan flow 224m3 / h air cooler fan horsepower. 5.5 kw air cooler fan number 16 air cooler number 4 seat 200945741 air cooler heat exchange Dong 2,060 kw in the current operation practice Within 24 hours of the shutdown of the unit, four of the fans must be operated; to reduce the temperature of the cooling water so that the generator can be removed from the tropics, and the feed shut-off valve is closed after the gas turbine has been shut down for at least half an hour. Planning and implementation 1. Hot Dong calculation 'The design value shows that the specific heat of water is 4.12kJ/kg K (=2,060kw/(100 kg/s ❹ x5K)), while the quality of feed water is (96 kg/s34°C) Suppose we design a margin of 10%, so CEP feed water must absorb 3,662kw (=3,296kw/0.9) of heat to reduce the generator cooling water temperature by 4 °C, then CEP Feed water temperature can be increased from 34eC to 43.3eC (=3,662kw / (4.12 kJ / kgK x 96 kg / s)); then through the new plate plate heat exchanger. Generator cooling water temperature can be reduced from 46 ° C 42 °C (=3,296kw/(4.12kJ/kg Kx 200 kg/s)). Therefore, by adding a plate-type heat exchanger with a heat exchange capacity of 3,662kw (=3,296kw/0.9), the original assumed operating condition can be achieved, that is, the generator cooling water inlet temperature is 46 °C. The outlet temperature was 42 °C. ❹ 2. The pipeline process can use the plate-type heat exchanger with an efficiency of 90~95% during overhaul, in order to preserve the feasibility of its single cycle; the original pipeline can be reserved only to increase the flow control valve for switching. And to control the flow of cooling water, in order to increase flexibility 'can be installed before and after the heat exchanger shut-off valve and drain pipe for maintenance work. Under the bottom, all the running moves and processes will be sorted out: 200945741 * § —-— —------ ^- 1 ---------- Hooked water to CEP exit (not Gran Hot Exchange Water) (18bar, 96 kg / s * 34 ° 〇 2 ~ - s cooling square 弐 generator cooling water · · 200 kg / s and feed water through the plate type factory exchanger for heat exchange ''' 3 - --- Two sentences predict the temperature of the generator cooling water inlet temperature is 46 ° C, and the outlet temperature is 42 ° C m 4 ------ drink -, operation mode 5 to 1 operation switch to 1 to 1 The feed water shut-off valve has not been closed since the beginning of the transfer, and the generator cooling water of the unit is still cooled by the feed water via the newly-set plate heat exchanger; when the feed shut-off valve is closed All generator cooling water will be cooled by a running copper water. The 1 to 1 operation switching decoupling and uncoupling initial feed shut-off valve has not been closed, and the unit cooling water of the unit is 2〇〇kg/s. The plate heat exchanger is newly cooled by the feed water; when the CEP is stopped, the flow of the generator cooling water can be determined by the electric valve control or the cooling water can be sent to the original wind. Cool the system and start four fans to cool. 5 Feeding water temperature after heat exchange is 43.3 °C (not yet passed through the Grand Heat Exchanger and the drain heat exchanger) ❹ 6 Construction method 増琛 A plate heat exchanger is issued on GTN1 Motor forced cooling system next to the cooling fan (N: for the unit, not 1, 2, 3 respectively) GTN2 generator cooling water (100 kg / s) connected to GTN1 generator cooling water (100 kg / s) mixed and sent The heat exchange to the plate heat exchanger and the feed water (N: for the unit, 1, 2, 3 respectively) is sent to the plate type heat exchange by the feed water of the turbine room without the G. After the heat exchange between the generator and the generator cooling water is sent back to the original pipeline feed water 200945741 The construction record has been completed in the previous day (June 8, 1996), and the heat exchanger is semi-welded by GEA. There is one type of semi-welded plate heat exchanger, model LWC 250S B-25; the main specifications are shown in Table 1. The biggest difference from the general plate heat exchanger is that the high pressure fluid passage is welded and low pressure. The fluid passage is a gasket type. It can be seen from Table 1 that this type of heat exchanger has a Duty margin. 30%, which means that the designed heat exchange capacity is 4,050kw; but the maximum heat exchange capacity can reach 5,265kw or more. β Table 2 is the generator cooling water (hot water) and feed water (cold water) analog thermometer ( Generator cooling water inlet temperature from 46 ° C to 36 ° C, every 1 ° C for an interval β feed water flow from 96 kg / s to 30 kg / s, every 10 kg / s interval; feed water The inlet temperature is from 381 to 34° (: every interval of leC). In this way, we can estimate the temperature after cold and hot water heat exchange according to the operating conditions. The above discussion is for the value of the field, but there are many restrictions on the field practice; we will discuss one by one: 1. Feeding pipeline: From the discussion above, we know that we will use CEP to produce α-feed water, which has not yet passed through The heat exchanger, whose temperature will be about 2 lower than the feed water passing through the Glan heat exchanger. But the problem is: the feed water that has not yet passed through the Genglan heat exchanger is far away from the steam engine room, and using it as a cooling source will extend the pipe about 300 meters away; the first problem is the problem of pressure loss. The two are construction problems, because the new heat exchanger installation location and the steam engine room are separated by two roads. If the water supply pipeline is extended, the trench will be dug. This is only 2 °C. It seems that it is not worth it. The copper water of the Grand Heat Exchanger, because the temperature through the turbine room to the boiler room is only slightly higher than the copper water (about 1 ° C) that has not passed through the grid heat exchanger, 'the pipeline is reduced by more than half the length (about 100 long) Meter); and not designed for 200945741. • After crossing the road, the work is much less difficult and the pressure loss is within acceptable limits. The version earns Μ 珥 珥 珥 珥 珥 格兰 格兰 格兰 格兰 格兰 格兰 格兰 格兰 格兰 格兰 2、 2、 2、 2、 2、 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 After the motor cooling water is combined, it is sent to the newly set cooling; however, the problem is: GT22 extends the generator cooling water to the GT21 side through the expansion joint and the road's length is about 2 meters away and the pipe trench needs to be dug; The pressure loss of the pipeline and the leakage of gas through the expansion joint cause the temperature of the generator cooling water to increase. The most _ later change will extend the pipe section from 1〇” pipe to 12, the pipe, and the pipe extension will be adopted by the air (the original pipe frame is available in the original part) The reduction is 1 ft.. In the original generator cooling water system, we add a check valve and an electric valve. The check valve acts as a cooling system to improve the system. The original fan system' and the action of the electric valve detects when the temperature of the generator cooling water is too high (currently set to 52eC valve open, the cooling water in the original fan system is added to the system to adjust the cooling water temperature; When the temperature of the generator cooling water will be low (currently set to 46 °C, the system will only be shut off. At this time, only the system will be improved.) 3. Pipeline hydration: In order to reduce the actual test time, the first step is to do it at 97.01.10 GT22 standby. Pipe flushing and water replenishment action, because the original generator cooling water enters when hydrating; all the original system continues to operate only by using the water supply pipe to replenish the water. The total time required for the process is 80 minutes' and the additional exhaust pipe is used for 40 minutes. Then, at 97.01.15, we use the GT22 to isolate the original generator cooling water system with the electric valve. System, but the test results found that the flow rate is only 2,500 kg/mim (about 42'kg/s), which is quite different from the actual system 200945741 (100 kg/s). After the calibration of the flowmeter, the ultrasonic flowmeter is used. The measurement is carried out. At this time, the flow is about 110 kg/s, which is larger than the original system flow. The reason may be that the tube loss is reduced by the original heat exchanger. 97.01.16 reconfirmed the flow of the flow. The size of the orifice plate does not match, and the water is replenished after re-correction. At this time, the pressure is higher than before (the electric valve opening is increased by 9 〇kg/s, the inlet and outlet pressures are 1.34 / 1.31 kg/cm; When the valve is closed, the flow rate of the pipeline is 138 kg/s, and the inlet and outlet pressures are 1.44/ 1.19 kg/cm. To confirm the correctness of the flowmeter and the pressure gauge, please check the flow and pressure of the GEA factory. Loss comparison table (as shown in the table below), we found that when the pressure is 0.25 kg / At cm2, the flow rate at this time is about 7,666 kg/mim, which is about 128 kg/s, and the detected flow rate is still 138 竑/s (the detection flow rate is designed at 2〇〇吆/s); At this time, it can be recognized that the heat exchanger has not passed the extensive heat exchanger, and the flow rate is increased by the amount of kg /mim 5,000 6,000 7,000 8,000 9,000 ιο, οοο 11,000 12,000 pressure loss bar 0.11 0.15 0.21 0.27 0.34 0.42 0.51 0.58 The water supply at the water supply end is smoother. After the 1 to 1 operation, the pipeline is filled with water, and then the shut-off valve added to the original pipeline is closed to make the feed water pump pass through the added rhyme pipeline. Generator cooling water system to improve the actual pipeline process 曰圊五·200945741 The field test applied to the dispatching office at 97.01.18 to test the effectiveness of this improvement work, the main purpose of which is to play various states in the operation; To ensure safety, the record table is shown in Table 3. The original pressure of the original generator cooling water expansion tank is 40 kPa (theoretical should maintain lOOkPa), so the measurement pressure is low, and has been increased by about 60 kPa after replenishment; In any state, it can be the same as using a fan system (it was originally estimated that when one-to-one operation was performed, two cooling water systems were connected together; when the cooling water pump that did not operate the unit was deactivated or suddenly started, the pressure wave was caused. Will affect the running unit and cause the jump). At 27.10.19, the dispatcher was asked to make a 2-to-1 full load test and reached full load at 12:00. The test results are as follows: The generator cooling water flow exceeds the original design value. The original generator cooling water design value is 200 kg / s, but the test measurement value is 228 kg / s (set the maximum measured value of 260 kg / s), fearing that the measured value is problematic, then please GEA original factory Make a flow and pressure loss comparison table (as shown below) to extend the table above and above. Flow kg /mim 3,000 4,000 13,000 14,000 15,000 16,000 Pressure loss bar 0.05 0.08 0.68 0.79 0.91 1.04 The flow rate is 228 kg/ s (= 13, 680 kg / min) pressure loss is about 75.75bar, and the field pressure difference is about 0.85 kg / cm1. There is considerable error between the two. Later, the maximum value of the measurement is changed to 280 kg/s. At this time, the flow rate is 242 kg / s (= 14,520 kg / min), and the pressure loss at the time of the comparison table is about 0.85 kg/cm 2 , 200945741 The result is quite close. Therefore, it is confirmed that the cooling water flow rate should be about 24 〇吆/S or more (the original design value is 200 kg/s). 2. Pay attention to the generator cooling water temperature during initial operation. The nickname value found that after about 30 minutes after the start of the cockroach, the feed water flow rate N was started to have cold water for heat exchange. At this time, the temperature of the generator cooling water was about 9. °C higher than when it was just started. Still acceptable. When you want to start the first gas turbine of the machine, you need to pay attention to the temperature rise of the generator cooling water to avoid the excessive temperature and damage the safety of the unit. Β 3. All the units are uncoupled and pay attention to the generator. Cooling water temperature. It was originally expected to complete the one-to-one test at 97.01.18, but due to the low power demand, the dispatching department requested the unlinking; although the CEP still maintained about 45 minutes after the unit was uncoupled, it was still not enough to take away the heat; The cooling water temperature of the generator was maintained at 45 °C during the day shift. Later, the electric valve was opened safely for the unit to make the cooling water in the original fan system (below the cooling temperature is low) and the cooling water of the additional pipeline. To lower the temperature. In the future, if you encounter such a situation, please ask the staff on duty to do so. 4. Expansion tank pressure and water level • Before the test, the air pressure was added due to insufficient expansion pressure, but the generator cooling water on both sides of GT21 and GT22 was ignored. The water level on both sides was too much. The expansion tank fill pressure • The water level of the expansion tank of the GT22 has been rising during the test. Finally, the nitrogen pressure of the GT21 is lowered and the water is released by the expansion tank of the GT22 so that the water level and pressure of the two are equivalent. When the expansion tank is replenished, pay attention to the water level difference between the two sides, or close one side of the expansion tank and use an expansion tank alone. 200945741 Efficiency test Apply for generator cooling water for full load operation. Another hour to confirm the use of the fan system, and. Under the test is our factory in 97.02.01 0G00 ~ 97.02.03 1GO0 system to improve the efficiency test, GT21/22 for 48 consecutive times in order to make a comparison, apply for GT11/12 full load operation 4 good case effect. And in the last two hours, the GT21 GT22 uses an improved system, and the two are further confirmed by some small cautions:

1. The weather temperature affects the cooling efficiency of the generator cold water system. Since GTii Gang was fully loaded in the afternoon due to scheduling requirements, it was changed to AGC operation. I If the generator continues to run, the temperature of the generator cooling water will continue to rise. The next two tables are recorded at 97.02.01 AM 09: 00 and PM 13: 30, respectively, because the external atmospheric temperature is about 16 ° C in the morning, and the external temperature is raised to 22 ° C at noon; so it can be clearly found The GT11/GT12 uses the original fan cooling system. In the morning and at noon, the generator cooling water temperature varies greatly with the atmospheric temperature, while the GT21/GT22 uses an improved system whose generator cooling water temperature is relatively stable. But if it is in midsummer, The external atmospheric temperature will be above 32 °C. The improved system uses condensed water for cooling, while the condensed water is cooled by seawater; the seawater temperature is relatively stable (the condensate temperature is up to 40eC during the summer last year, and At present, the condensate temperature is 36 ° C) e. It is estimated that the improved system can only maintain the temperature of the original system when the temperature is low in winter, but the temperature of the generator cooling water can be exceeded when the high temperature is running in the summer.

Low 97.02.01 AM 09 : 〇〇 Full load operation GT11 GT12 GT21 Generator cooling water inlet temperature (°c) 34.250 35.063 42.563 200945741 Generator cooling water outlet temperature < 〇31.313 32.375 39.313 38.938 Generator cooling air inlet humidity (°C 35.438 34.500 41.813 41.813 Generator cooling air outlet temperature (°C) 68.688 66.438 73.438 73.438 97.02.01 PM 13 : 30 Full load operation GT11 GT12 GT21 GT22 Generator cooling water inlet temperature (°C) 42.125 42.813 42.500 Generator cooling water outlet Temperature (°C) 39.750 39.500 39.188 Generator cooling air inlet overflow (°c) 42.375 42.625 42.125 Generator cooling air outlet metric (°c) 73.813 76.188 75.125 2. Generator cooling water cooling efficiency is improved. The following table compares the cooling water of the generator and the cooling air before and after cooling (ie, temperature). We find that the temperature of the system is higher than the original system regardless of the temperature difference of the cooling water of the generator in the morning or at noon. The temperature difference, which means that the cooling capacity of the improved system is better than the original system. It is speculated that the reason should be that the generator cooling water volume increases (the original two generators H cooling water flow rate is 200/kgs, but now the 24V/S soybean meal has increased water flow rate β 97.02.01AM09:00 full load operation GT11 GT12 GT21 GT22 Generator cooling water temperature difference 937 2.937 2.688 3.250 3.187 Generator cooling air 31 difference (eC) 33.25 31.938 31.625 31.625 200945741 97.02.01 PM 13 : 30 Full load operation GT11 GT12 GT21 GT22 Generator cooling water temperature difference ct) 2.375 3.313 3.312 Motor cooling air temperature difference (ec) 31.438 33.563 33.000 3. The heat absorption capacity of the generator cooling water is deteriorated. The so-called system switching in the table below refers to the use of the GT21/22 to improve the system, while the system switching refers to the GT21 using the original fan system; and the GT22 uses the improved system. Because the original fan system design generator cooling water inlet temperature is 42 ° C, and the outlet temperature is 37 ° C; 瘳 means that this system can absorb 5 ° C temperature difference, but we found that the system GT22 generator inlet and outlet temperature difference after system switching It is only about 3*0; the GT21 is only 3.25 °C, and the system heat absorption requirement of 5 °C is not achieved, so it is possible that the heat exchange effect of the generator cooler and the oil cooler is deteriorated. Before the system is switched, the temperature difference of the generator cooling water is about 3.35 t, and the temperature difference after the system switching is reduced to nearly 3eC, which is due to the fact that the design of the softer cooler is too large (the generator cooling water design is 200 kg/s). 'When switched, the generator cooling water flows through the heat exchanger because only the cooling water of the GT22 is flown; therefore, the flow rate is reduced to 143 kg / s), so that the generator cooling water cannot be condensed + sufficiently cooled in the _ channel. 97.02.03 AM 0G30 Full load operation system switching before system switching (C5T21 using original fan system 'GT22 use improvement system) GT21 GT22 GT21 GT22 Generator cooling water inlet overflow (°C) 43.063 42.813 37.188 39.563 Generator cooling water outlet temperature (c) 39.750 39.375 33.938 36.625 Generator cooling water temperature difference (c) 3.313 3.438 3.250 2.938 _____— ❹ 200945741 Generator cooling air inlet temperature ΓΟ 43.063 42.500 37.313 39.625 Generator cooling air outlet temperature Ct) 77.375 76.438 72.875 74.313 Generator cooling air Temperature difference (°c) 34.312 33.938 35.562 34.688 97.02.03 AM 0G30 GT21 GT22 GT21 GT22 condensate outlet temperature (ec) after system switching before full load operation system switching 43.2 39.7 Feed water flow rate for temperature adjustment V/s) 12.190 11.512 13.787 13.325 Leave Boiler feed water temperature (ec) 153.20 153.50 151.94 152.44 4. Condensate temperature rise changes boiler heat exchange behavior. The following table shows that the condensate temperature difference before and after the system switching is 3.5 eC, while the feed water flow rate for temperature adjustment is increased by about 1.5 kg/s; and the temperature of the feed water leaving the boiler is reduced by about ^.^, thus the condensation The heat of the water-absorbing generator cooling water does reflect the heat exchange behavior of the boiler; it will ultimately be reflected in the power generation and efficiency of the unit. It can also be verified that increasing the temperature of the feed water will increase the efficiency of the unit. The coal-fired unit is the same; it is not different because the feed water of the double-cycle unit has a temperature control before entering the boiler (the factory #1^3 is set to 65eC, and the #4 machine is 55°C). ___ In Table 4, the efficiency test record of the generator cooling water shows that the efficiency is better than the contract requirement (93%), which confirms that the scheme is feasible. We can find that the actual heat exchange capacity is about 3,300kw. In other words, even if the plate heat exchanger is added, the heat absorption will not reach the original design target (4,120kw). In the improved system, the cooling water flow rate increases, and the design heat exchange capacity of the plate heat exchanger is sufficient (5, 265kw). Why is the heat exchange 200945741? Therefore, it is possible that the heat exchange effect of the generator cooler and the lake oil cooler is deteriorated, resulting in deterioration of the heat exchange between the generator cooling air and the lubricating oil and the generator cooling water; the rain generator cooling water cannot provide enough heat. take away. In the sixth six, we append the working principle of a heat exchanger. The heat exchange is composed of a piece of hot water piece and a piece of cold water piece separated from each other; the advantage is that the exchange area is large, and the volume of the shell-and-tube heat exchanger is opposite. Smaller. However, for the higher schematic diagram, the black part is rubber-like dense--the point is as shown in Figure 7. The heat exchange fluid of the plate is limited.

❹ 200945741

❹ Table 1: ljWC250SB-25 its main specifications Hot side Cold side Fluid Water Water Density kg/m3 990.78 992.56 heat capacity J/ikg^K) 4,179.01 4,178.35 Thermal conductivity W/(m*K) 0.6329 0.6271 Dyn. Viscosity inlet cP 0.585 0.734 Dyn. Viscosity outlet cP 0.639 0.605 Flow channels of media Welded channel Gasketed channel Mass flow rate kg/h 720,000 345,600 Volume flow m3/h 726.70 348.19 Inlet Temperature °C 46.00 34.00 Outlet Temperature °C 41.15 44.10 Pressure drop bar 0.58 0.17 Internal flow (passes x channel) 1x153 1x152 Heat exchanged kw 4,050 LMTD K 3.966 OHTC needs W/(m2*k) 3,573.9 OHTC service W/(m2*k) 4,649.6 Heat transfer area m2 285.76 Duty margin % 30.1 200945741

Hot side Cold side Fluid Water Water Plate material / thickness ALLOY 316/0.6 mm Sealing material EPDM glueless Connection material Stainless steel Stainless steel Connection diameter mm 250 250 Design code AD-2000 Design pressure barg 10.0 20.0 Test pressure barg 13.0 26.0 Design temperature °C 100.0/0.0 100.0/0.0 Overall length x width x height mm 2,446x895x2,212 Net weigh, empty / operating kg 4,594/5,619 200945741 Hot water flow 30kg/s 46.00 44.22 34.00 45.87 45.00 I 43.37 34.00 44.88 44.00 , 42.52 34.00 43.89 43.00 I 41.67 34.00 42.90 42.00 40.81 34.00 41.91 41.00 39.96 34.00 40.92 40.00 39.11 34.00 39.93 39.00 38.26 34.00 38.94 38.00 37.41 34.00 37.95 37.00 36.56 34.00 36.97 36.00 35.70 34.00 35.97 PPP Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 40kg /s 46.00 I 43.68 I 34.00 45.60 45.00 42.87 34.00 44.63 44.00 42.07 34.00 43.67 43.00 1 41.26 34.00 42.70 42.00 40.45 34.00 41.73 41.00 39.65 34. 00 40.77 40.00 | 38.03 34.00 39.80 39.00 38.00 38.83 388.00 37.23 34.00 37.87 37.00 36.42 34.00 36.90 36.00 35.61 34.00 35.93 PP Heat. Water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature ♦1 46.00 43.15 34.00 45.40 45.00 I 42.39 34.00 44.45 44.00 41.63 34.00 43.50 43.00 I 40.86 34.00 42.55 42.00 40.10 34.00 41.60 41.00 | 39.34 34.00 40.65 40.00 38.58 34.00 39.70 39.00 37.81 34.00 38.75 38.00 37.05 34.00 37.80 37.00 36.29 34.00 36.85 36.00 35.53 34.00 35.90 PPP hot water inlet temperature hot water outlet temperature cold water inlet temperature Cold water outlet temperature Hot water flow 60kg/s 46.00 42.67 34.00 丨45.10 45.00 41.95 34.00 ! 44.17 44.00 1 41.23 ! 34.00 43.25 43.00 1 40.45 1 34.00 42.32 42.00 39.78 34.00 41.40 41.00 1 39.06 34.00 40.47 40.00 38.34 34.00 39.55 39.00 37.61 34.00 38.62 38.00 36.89 34.00 37.70 37.00 36.17 34.00 36.77 36.00 35.45 34.00 35.58 P 〇〇 hot water inlet temperature hot water outlet temperature cold water inlet temperature cold water outlet temperature 20094574 1 - 〇1 46.00 I 42.20 34.00 44.86 45.00 41.52 34.00 43.95 44.00" 40.83 34.00 43.05 43.00 40.15 34.00 42.14 42.00 39.47 | 34.00 41.24 41.00 38.78 34.00 1 40.33 40.00 38.10 34.00 39.43 39.00 37.42 34.00 38.52 38.00 36.73 34.00 37.62 37.00 36.05 34.00 36.71 36.00 35.37 34.00 35.81 Ρ Ρ Ρ Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature & (4) 46.00 I 41.80 34.00 44.50 45.00 41.15 34.00 43.63 44.00 40.50 34.00 42.75 43.00 34.00 41.88 42.00 39 39.20 34.00 41.00 41.00 38.55 34.00 40.13 40.00 37.90 34.00 39.25 39.00 37.25 34.00 38.38 38.00 36.60 34.00 37.50 37.00 35.95 34.00 36.63 36.00 35.30 34.00 35.75 Ρ Ρ Ρ Ρ Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 90kg/s 46.00 41.40 I 34.00 44.22 45.00 40.78 34.00 43.37 44.00 | 40.17 34.00 42.52 43.00 39.55 34.00 41.67 42.00 38.93 34.00 40.81 41.00 38.32 | 34.00 39.96 40.00 37.70 34.00 1 39.11 39.00 37.08 34.00 38.26 38.00 36.4 7 34.00 37.41 37.00 35.85 34.00 36.56 36.00 35.23 34.00 35.70 PPPP Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 96]ig/s 46.00 41.15 1 34.00 44.11 45.00 40.56 34.00 43.26 44.00 39.96 34.00 42.42 43.00 j 39.36 34.00 41.58 42.00 38.77 34.00 40.74 41.00 38.17 34.00 39.89 40.00 37.58 34.00 39.05 39.00 36.98 34.00 38.21 38.00 36.38 34.00 37.37 37.00 35.79 34.00 36.53 36.00 35.19 34.00 35.68 PPPP Hot water inlet temperature hot water outlet temperature cold water inlet temperature cold water outlet temperature 200945741

o. - O ♦1 戚I 46.00 44.38 I 35.00 45.80 45.00 I 43.53 35.00 44.81 44.00 42 42.68 35.00 43.83 43.00 41.82 35.00 42.85 42.00 I 40.97 35.00 41.87 41.00 40.12 35.00 ! 40.89 40.00 | 39.26 35.00 1 39.91 39.00 38.41 35.00 38.93 38.00 | 35.00 37.94 37.00 36.71 35.00 36.96 36.00 35.85 35.00 35.98 Ρ Ρ Ρ Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature 〇I 46.00 I 43.88 35.00 45.60 45.00 43.07 35.00 44.64 44.00 42.27 35.00 1 43.67 43.00 41.46 35.00 42.71 42.00 40.65 35.00 41.75 41.00 39.84 35.00 40.78 40.00 39.04 35.00 39.82 39.00 38.23 35.00 38.85 38.00 37.42 35.00 37.89 37.00 36.62 35.00 36.93 36.00 35.81 35.00 35.96 | PPPP Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature 46.00 43.39 35.00 45.44 45.00 42.63 35.00 44.49 44.00 41.87 35.00 43.54 43.00 I 41.10 35.00 42.59 42.00 40.34 35.00 41.64 41.00 [39.58 35.00 40.69 40.00 38.81 35.00 39.74 39.00 38.05 35.00 38.80 38.00 37.29 35.00 37.84 3 7.00 36.53 35.00 36.90 36.00 35.76 35.00 35.95 PPPP Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 60kg/s 46.00 42.94 35.00 1 45.20 45.00 42.22 35.00 44.27 44.00 I 41.50 35.00 43.34 43.00 1 40.78 35.00 42.42 42.00 40.05 35.00 41.49 41.00 39.33 35.00 40.56 40.00 38.61 35.00 39.63 39.00 37.89 35.00 38.71 38.00 37.17 35.00 37.78 37.00 36.44 35.00 36.85 36.00 35.72 35.00 35.93 PPPP Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature 200945741 〇Φ4 46.00 42.55 35.00 44.86 45.00 41.86 35.00 43.96 44.00 41.18 35.00 —. 43.06 43.00 40.49 1 35.00 42.17 42.00 ... j 39.81 35.00 41.27 41.00 ______________1 39.12 35.00 40.38 40.00 38.43 35.00 39.48 39.00 37.75 35.00 Γ 38.58 38.00 37.06 1 35.00 37.69 37.00 36.37 35.00 36.79 36.00 35.69 35.00 35.89 〇〇Ο〇 Ρ Ρ Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 80kg/s 46.00 42.15 35.00 I 44.63 45.00 41. 50 1 35.00 43.75 44.00 40.85 35.00 42.88 43.00 40.20 35.00 42.00 42.00 39.55 35.00 41.13 41.00 | 38.90 35.00 40.25 40.00 38.25 35.00 39.38 39.00 37.60 35.00 38.50 38.00 36.95 35.00 37.63 37.00 36.30 35.00 36.75 36.00 35.65 35.00 35.88 P 0〇 Hot water inlet temperature hot water Outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 90ltg/s I 46.00 41.80 35.00 44.33 45.00 41.18 35.00 I 43.49 44.00 1 1 40.56 35.00 42.64 43.00 ____ ___ 1 39.95 35.00 41.79 42.00 39.33 35.00 40.94 41.00 38.71 35.00 40.09 40.00 38.09 35.00 ί 39.24 39.00 37.37 35.00 38.39 38.00 36.86 35.00 37.54 37.00 36.24 35.00 36.70 36.00 35.62 35.00 35.85 P 〇〇 hot water inlet temperature hot water outlet temperature cold water inlet temperature cold water outlet temperature

Hot water flow 96 lig/s 46.00 41.56 35.00 44.25 45.00 40.96 35.00 43.41 44.00 40.37 35.00 42.57 43.00 39.77 1 35.00 1 41.73 42.00 1 39.18 35.00 40.89 41.00 38.58 35.00 I 40.04 40.00 37.98 35.00 39.20 39.00 37.39 35.00 38.36 38.00 36.79 35.00 37.52 37.00 36.19 35.00 36.68 36.00 35.60 35.00 35.84 Hot water inlet temperature °C Hot water outlet temperature °C Cold water inlet temperature °C Cold water outlet temperature °C 200945741 e-.G 41 46.00 44.53 I 36.00 45.80 45.00 43.68 36.00 44.82 44.00 42.82 36.00 43.84 43.00 41.97 36.00 42.86 42.00 41.12 36.00 41.88 41.00 40.27 36.00 40.90 40.00 39.41 36.00 39.92 39.00 38.56 36.00 38.94 38.00 1 37.71 36.00 37.96 37.00 36.85 36.00 36.98 36.00 36.00 36.00 36.00 PO〇PP Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature

〇46.00 44.06 36.00 45.70 45.00 43.25 36.00 44.73 44.00 | 42.45 36.00 43.76 43.00 41.64 36.00 42.79 42.00 40.84 36.00 41.82 41.00 40.03 36.00 40.85 40.00 39.22 36.00 39.88 39.00 38.42 36.00 38.91 38.00 37.61 36.00 37.94 37.00 36.81 36.00 36.97 36.00 36.00 36.00 36.00 Hot water inlet temperature °C Hot water outlet temperature °C Cold water inlet temperature °C Cold water outlet temperature °C Hot water flow 50Icg/s 46.00 43.62 36.00 I 45.52 45.00 42.86 36.00 44.57 44.00 i 42.10 36.00 43.61 43.00 41.33 36.00 42.67 42.00 40.57 36.00 41.71 41.00 | 39.81 36.00 40.76 40.00 39.05 36.00 39.81 39.00 38.26 36.00 38.86 38.00 37.52 36.00 37.90 37.00 36.76 36.00 36.95 36.00 36.00 36.00 36.00 PP 〇0 Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 60kg/s 46.00 I 43.24 36.00 45.20 45.00 I 42.52 36.00 44.28 44.00 41.79 ! 36.00 43.36 43.00” 41.07 36.00 42.44 42.00 40.34 36.00 41.52 41.00 39.62 36.00 ί 40.60 40.00 38.90 36.00 39.68 39.00 38.17 36.00 38.76 38.00 37.4 5 36.00 37.84 37.00 36.72 36.00 36.92 36.00 36.00 36.00 36.00 PPP Ρ Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature 200945741 e_ ' 〇〇φ| 46.00 42.86 36.00 44.97 45.00 42.17 36.00 44.08 44.00 41.49 36.00 43.18 43.00 ί 40.80 36.00 42.38 42.00 j 40.12 36.00 41.38 41.00 39.43 36.00 40.49 40.00 1 38.74 36.00 39.59 39.00 38.06 36.00 38.69 38.00 37.37 36.00 37.79 37.00 36.69 36.00 36.90 36.00 36.00 36.00 36.00 PP Hot water inlet temperature hot water outlet temperature cold water inlet temperature cold water outlet temperature hot water flow 80 Kg/s 46.00 42.50 36.00 丨44.75 45.00 41.85 36.00 43.88 44.00 41.20 36.00 43.00 43.00 40 40.55 36.00 42.13 42.00 39.90 36.00 41.25 41.00 39.25 36.00 40.38 40.00 38.60 36.00 39.50 39.00 37.95 36.00 38.63 38.00 37.30 36.00 37.75 37.00 36.65 36.00 36.90 36;00 36.00 36.00 36.00 〇〇PP hot water inlet temperature hot water outlet temperature cold water inlet temperature cold water outlet temperature

Hot water flow 90kg/s 46.00 42.18 36.00 44.49 45.00 41.56 36.00 43.64 44.00 40.94 1 36.00 42.79 43.00 40.33 36.00 41.94 42.00 39.71 36.00 41.09 41.00 39.09 36.00 40.25 40.00 38.47 36.00 39.40 39.00 37.85 36.00 38.55 38.00 37.24 36.00 37.70 37.00 36.62 36.00 36.85 36.00 36.00 36.00 36.00 Hot water inlet temperature °C Hot water outlet temperature °C Cold water inlet temperature °c Life water outlet temperature °C Hot water flow 96kg/s 46.00 41.96 36.00 44.42 45.00 41.36 36.00 43.58 44.00 40 40.77 36.00 42.73 43.00 j 40.17 36.00 41.89 42.00 1 39.58 36.00 41.05 41.00 38.89 36.00 40.21 40.00 38.38 36.00 39.37 39.00 37.79 36.00 38.53 38.00 37.19 36.00 37.68 37.00 36.60 36.00 36.84 36.00 36.00 36.00 36.00 〇〇PPP Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature 200945741 - Hot water flow 30 Kg/s 46.00 44.67 I 37.00 I 45.87 45.00 — 1 43.82 37.00 44.88 44.00 42.97 1 37.00 43.89 43.00 L42.ll — 37.00 42.91 42.00 41.26 37.00 1 41.92 41.00 40.41 37.00 40.94 40.00 39.56 37.00 39 .95 39.00 38.71 37.00 38.97 38.00 37.85 37.00 37.98 37.00 37.00 37.00 37.00 36.00 \ 37.00 \ P Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 40 kg/s 46.00 I 44.26 I 37.00 45.70 45.00 43.45 37.00 44.73 44.00 ί 42.65 1 37.00 43.77 43.00 1 41.84 37.00 1 42.80 42.00 41.03 37.00 ! 41.83 41.00 40.23 37.00 40.87 40.00 39.42 37.00 39.90 39.00 38.61 37.00 38.93 38.00 37.81 37.00 37 37.97 37.00 37.00 37.00 37.00 | 36.00 \ 37.00 \ Ρ 热水 Hot water inlet temperature heat Water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 50 kg/s 46.00 43.87 I 37.00 45.52 45.00 43.11 37.00 44.57 44.00 43.63 37.00 42.34 43.00 41.58 37.00 42.68 42.00 40.82 37.00 41.73 41.00 40.05 37.00 40.78 40.00 39.29 37.00 39.84 39.00 38.53 37.00 38.89 38.00 37.76 37.00 37.94 37.00 37.00 37.00 37.00 | 36.00 \ 37.00 \ PPPP Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 60lcg/s 46.00 43.50 37.00 45.33 45.00 42.78 37.00 44.41 44.00 42.06 37.00 43.48 43.00 41.33 37.00 42.55 42.00 ! 40.61 37.00 41.63 41.00 1 39.89 37.00 40.70 40.00 39.17 37.00 39.78 39.00 38.45 37.00 38.85 38.00 37.72 37.00 37.92 37.00 37.00 37.00 37.00 36.00 \ 37.00 \ PPPP Hot water inlet temperature hot water outlet temperature Cold water inlet temperature Cold water outlet temperature 200945741 Φ - ❿ 〇 carbon 46.00 43.16 II 37.00 1 45.12 45.00 42.48 37.00 44.21 44.00 I 41.79 37.00 43.31 43.00 I 41.11 1 37.00 1 ___ 42.41 42.00 I 40.42 37.00 41.51 41.00 | 39.74 37.00 40.61 40.00 39.05 37.00 39.70 39.00 38.37 37.00 38.80 38.00 37.69 37.00 37.90 37.00 37.00 37.00 37.00 36.00 \ 37.00 \ PO〇PP Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature § 46.00 I 42.55 37.00 44.67 45.00 i —___ __ 1 42.204 37.00 44.00 44.00 41.55 37.00 43.13 43.00 40.90 37.00 42.25 42.00 40.25 37.00 41.38 41.00 1 39.60 37.00 40.50 40.00 38.95 37.00 39.63 39.00 38.30 37.00 38.75 38.00 37.65 37.00 37.88 37.00 37.00 37.00 37. 00 36.00 \ 37.00 \ PO〇 Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 90 kg/s 46.00 42.55 | 37.00 I 44.67 45.00 41.93 37.00 43.81 44.00 41.32 37.00 42.96 43.00 40.70 37.00 42.11 42.00 | 40.08 37.00 41.26 41.00 39.47 37.00 40.41 40.00 38.85 37.00 39.56 39.00 38.23 37.00 38.70 38.00 37.62 37.00 37.85 37.00 37.00 37.00 37.00 36.00 \ 37.00 \ PPO〇P Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 96kg/s 46.00 44.56 37.00 42.37 45.00 41.77 37.00 43.72 44.00 I 41.18 37.00 42.88 43.00 40.58 37.00 42.04 42.00 39.98 37.00 41.20 41.00 39.39 37.00 40.36 40.00 38.79 37.00 39.52 39.00 38.19 37.00 38.68 38.00 37.60 37.00 37.84 37.00 37.00 37.00 37.00 36.00 \ 37.00 \ PPPP Hot water inlet temperature hot water Outlet temperature Cold water inlet temperature Cold water outlet temperature 200945741 o ' ❹ Hot water flow 30kg/s 46.00 44.82 I 38.00 45.87 45.00 43.97 38.00 1 44.88 44.00 _1 43.12 38.00 43.90 43.00 _1 42.26 38.00 42.96 42.00 ! 41.41 38.00 1 41.93 | 41.00 1 _1 40.56 38.00 40.95 40.00 39.71 38.00 39.97 39.00 38.85 38.00 38.98 38.00 38.00 38.00 38.00 37.00 \ 38.00 \ 36.00 \ 38.00 \ Ρ Ρ Ρ Hot water inlet temperature hot water outlet temperature cold water inlet temperature cold water Outlet temperature hot water flow 40kg/s 46.00 | 44.44 | 38.00 45.80 45.00 | 43.64 38.00 44.83 44.00 42.83 38.00 43.85 43.00 42.03 38.00 42.88 42.00 : 41.22 38.00 41.90 41.00 40.42 38.00 40.93 40.00 39.61 38.00 39.95 39.00 38.81 38.00 38.98 38.00 38.00 38.00 38.00 37.00 \ 38.00 \ 36.00 \ 38.00 \ P 0〇hot water inlet temperature hot water outlet temperature cold water inlet temperature cold water outlet temperature hot water flow 50kg/s 46.00 44.10 [ 38,00 I 45.60 45.00 | 43.34 1 38.00 44.65 44.00 42.58 38.00 43.70 43.00 i 41.81 | 38.00 42.75 42.00 41.05 38.00 丨41.80 41.00 40.29 38.00 40.85 40.00 39.53 38.00 39.90 39.00 38.76 38.00 38.95 38.00 38.00 38.00 38.00 1 37.00 \ 38.00 \ 36.00 \ 38.00 \ 〇〇PP Hot water inlet temperature hot water outlet temperature cold water Port temperature cold water outlet temperature hot water flow 60kg/s 46.00 1 43.77 1 38.00 45.43 45.00 43.05 38.00 44.50 44.00 i 42.33 38.00 43.57 43.00 41.61 38.00 丨42.64 42.00 40.89 38.00 41.72 41.00 40.16 38.00 40.79 40.00 39.44 38.00 39.86 39.00 38.72 38.00 38.93 38.00 38.00 38.00 38.00 37.00 \ 38.00 \ 36.00 \ 38.00 \ PPPP hot water inlet temperature hot water outlet temperature cold water inlet temperature cold water outlet temperature 200945741

0 .G hot water flow 70kg/s 46.00 | 43.48 38.00 45.20 45.00 42.80 38.00 1 44.30 | 44.00 _1 42.11 38.00 43.40 43.00 j 41.43 38.00 1 42.50 | 42.00 40.74 38.00 41.60 41.00 40.06 38.00 40.70 40.00 39.37 38.00 39.80 39.00 38.69 38.00 38.90 38.00 38.00 38.00 38.00 37.00 \ 38.00 \ 36.00 \ 38.00 \ P 0〇P Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 80kg/s 46.00 1 43.20 38.00 45.00 45.00 | 42.55 38.00 I 44.13 44.00 41.90 38.00 43.25 43.00 41.25 38.00 42.38 42.00 | 40.60 38.00 41.50 41.00 39.95 38.00 40.63 40.00 39.30 38.00 39.75 39.00 38.65 38.00 38.88 38.00 38.00 38.00 38.00 37.00 \ 38.00 \ "36.00 \ 38.00 \ PPPP Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water Flow rate 90kg/s 46.00 | 42.93 38.00 44.82 45.00 42.31 38.00 43.97 44.00 1 41.70 [38.00 43.12 43.00 41.08 38.00 42.22 42.00 40.47 38.00 41.41 41.00 39.58 38.00 40.56 40.00 39.23 38.00 39.70 39.00 38.62 38.00 38.85 38.00 38.00 38. 00 38.00 37.00 \ 38.00 \ 36.00 \ 38.00 \ P 0〇PP Hot water inlet temperature Hot water outlet temperature Cold water inlet temperature Cold water outlet temperature Hot water flow 96kg/s 46.00 42.76 38.00 44.75 45.00 42.17 38.00 43.91 44.00 41.57 38.00 43.06 43.00 40.98 38.00 42.22 42.00 40.38 38.00 41.38 41.00 39.79 38.00 40.53 40.00 39.19 38.00 39.69 39.00 38.60 38.00 38.84 38.00 38.00 38.00 38.00 37.00 \ 38.00 \ 36.00 \ 38.00 \ PPPP Hot water inlet no hot water outlet temperature cold water inlet temperature cold water outlet temperature 200945741

HP

遝 碍 i i^iCN GT22 electric valve off 22P'P start | 21P'P off | D 35 \ Ο cs 97 kg / s import \ inch 〇 · 21P'P start σ | rH c4 CN CN 170 kg / s import Inch 〇 · v〇d 22P'P off 21P, P off the exit \ \ \ Import 丨 \ \ 21P'P start the exit 〇 (N 90 kg / s import v 〇 GT22 electric valve open 22PT start i 21P 'P off | D 33 O) 70 kg / s import \ inch d 21P 'P start D • Η 〇 (N o CN 丨 135 kg / s import d inch d 22P 'P off 21 P'P closed export \ \ \ import \ \ 21 P'P start D Ή 1.95 \ 68 kg/s inlet ΙΛ d \ CN 1 flow

遝焱蛱 遝焱蛱 I (N GT22 electric valve off 22 P'P start 21 卩 '1> off | D • H \ fH CN 135 kg / s import \ 〇 21 PT start D • H inch Η inch CS 228 kg / s丨Import 0.45 〇22 P'P off 21PT off D 33 \ \ \ Import. \ 21 P'P start D •3Ϊ 〇οί \ 136 kg/s Import inch 〇 GT22 electric valve open 22 P'P start 21PT off DH \ Ο) — 91 kg/s import \ 0.45 21 P'P start D • 33 < Ν CN < N 173 kg / s into D inch 〇 0.55 22 P'P off 21P 'P off D 33 \ \ \ Import \ \ 21 启动»Starting Π 〇\ \ 98 kg/s Import inch 〇 · \ CN Flow 200945741 \ Mh Thin Thout Qh Me Tcin Tc out Qc Qc/Qh 1 14,340 44.1 40.7 3,392.61 6,246 35.6 43.2 3,331.13 0.9819 2 14,356 44.2 40.8 3,396.39 6,296 35.6 43.3 3,248.99 0.9566 3 14,412 44.1 40.8 3,309.36 6,061 35.7 43.3 3,206.79 0.9690 4 14,376 44.2 40.8 3,401.12 6,232 35.7 43.3 3,297.27 0.9695 5 14,387 44.2 40.8 3,403.72 6,205 35.7 43.3 3,282.98 0.9645 6 14,417 44.1 40.8 3,310.50 6,141 35.7 43.3 3,249.12 0.9815 7 14,392 44.0 40.7 3,3 04.76 6,087 35.6 43.2 3,220.55 0.9745 8 14,412 44.0 40.7 3,309.36 5,983 35.5 43.2 3,207.18 0.9691 9 14,335 43.9 40.6 3,291.67 6,021 35.4 43.1 3,227.55 0.9805 10 14,469 44.1 40.7 3,423.12 6,074 35.5 43.3 3,298.24 0.9635 11 14,366 44.1 40.8 3,298.79 6,035 35.6 43.3 3,235.05 0.9807 12 14,366 44.2 40.8 3,398.76 6,058 35.7 43.4 3,247.38 0.9555 13 14,397 44.1 40.8 3,305.91 6,095 35.7 43.3 3,224.78 0.9755 14 14,397 44.0 40.7 3,305.91 6,056 35.5 43.2 3,246.31 0.9820 15 14,305 44.0 40.7 3,284.79 6,020 35.5 43.2 3,227.01 0.9824 16 14,428 44.0 40.7 3,313.03 6,048 35.5 43.2 3,242.02 0.9786 17 14,387 43.9 40.6 3,303.61 5,997 35.4 43.1 3,214.68 0.9731 18 14,438 44.0 40.6 3,415.79 6,164 35.5 43.1 3,261.29 0.9548 19 14,371 44.0 40.7 3,299.94 6,022 35.5 43.2 3,228.08 0.9782 20 14,387 44.1 40.8 3,303.61 5,981 35.5 43.3 3,247.74 0.9831 21 14,428 44.1 40.8 3,313.03 6,041 35.6 43.3 3,238.27 0.9774 22 14,438 44.1 40.8 3,315.33 6,049 35.6 43.3 3,242.56 0.9781 23 14,407 44.1 40.8 3,308.21 6,07 5 35.6 43.3 3,256.49 0.9844 24 14,458 44.2 40.8 3,420.52 6,111 35.6 43.4 3,318.33 0.9701 25 14,458 44.3 41.0 3,319.92 6,016 35.7 43.5 3,266.75 0.9840 26 14,484 44.4 41.0 3,426.67 6,143 35.8 43.6 3,335.71 0.9735 27 14,443 44.4 41.0 3,416.97 6,038 35.8 43.6 3,278.69 0.9595 28 14,433 44.4 41.0 3,414.61 6,097 35.8 43.5 3,268.29 0.9571 29 14,387 44.2 40.9 3,303.61 6,052 35.7 43.4 3,244.16 0.9820 30 14,366 44.2 40.9 3,298.79 6,015 35.7 43.4 3,224.33 0.9774 31 14,392 44.2 40.9 3,304.76 6,047 35.7 43.4 3,241.48 0.9809 32 14,397 44.3 40.9 3,406.09 6,066 35.8 43.4 3,209.44 0.9423 33 14,428 44.2 41.0 3,212.63 5,842 35.8 43.5 3,131.59 0.9748 34 14,433 44.2 40.9 3,314.18 6,002 35.7 43.4 3,217.36 0.9708 35 14,448 44.2 40.9 3,317.62 6,019 35.7 43.4 3,226.47 0.9725 36 14,448 44.2 40.9 3,317.62 6,093 35.7 43.4 3,266.14 0.9845 200945741

❹ 37 14,438 44.3 41.0 3,315.33 6,049 35.8 43.5 3^42.56 0.9781 38 14,346 44.1 40.8 3,294.20 6,102 35.7 43.3 3,228.49 0.9801 39 14,433 44.1 40.8 3,314.18 6,079 35.6 43.3 3,258.64 0.9832 40 14,433 44.1 40.8 3,314.18 6,028 35.6 43.3 3,231.30 0.9750 41 14,433 44.0 40.7 3,314.18 6,026 35.5 43.2 3,230.23 0.9747 42 14,464 44.0 40.7 3,321.30 6,013 35.5 43.2 3,223.26 0.9705 43 14,448 44.0 40.6 3,418.16 6,187 35.5 43.1 3,273.46 0.9577 44 14,474 44.0 40.6 3,424.31 6,166 35.5 43.1 3,262.35 0.9527 45 14,422 44.0 40.6 3,412.00 6,111 35.5 43.1 3,233.25 0.9476 46 14,443 44.0 40.7 3,316.47 6,020 35.5 43.2 3,227.01 0.9730 47 14,412 43.9 40.6 3,309.36 6,148 35.5 43.1 3,252.82 0.9829 48 14,417 43.9 40.5 3,410.82 6,161 35.4 43.0 3,259.70 0.9557 49 14,392 43.8 40.4 3,404.91 6,225 35.3 42.9 3,293.56 0.9673 50 14,356 43.8 40.4 3,396.39 6,116 35.3 43.0 3,278.47 0.9653 51 14,387 43.9 40.5 3,403.72 6,184 35.3 43.0 3,314.92 0.9739 52 14,428 44.0 40.7 3,313.03 6,073 35.5 43.2 3,255.42 0.9826 53 14 , 402 44.0 40.6 3,407.27 6,207 35.5 43.1 3,284.04 0.9638 54 14,366 44.0 40.7 3,298.79 6,043 35.5 43.2 3,239.34 0.9820 55 14,392 43.9 40.6 3,304.76 6,079 35.5 43.1 3,216.32 0.9732 56 14,392 43.9 40.5 3,404.91 6,111 35.4 43.0 3,233.25 0.9496 57 14,366 43.9 40.5 3,398.76 6,143 35.4 43.0 3,250.18 0.9563 58 14,494 43.9 40.5 3,429.04 6,189 35.4 43.0 3,274.52 0.9549 59 14,458 43.8 40.5 3,319.92 6,078 35.3 43.0 3,258.10 0.9814 60 14,453 43.8 40.5 3,318.77 6,002 35.3 43.0 3,217.36 0.9694 61 14,392 43.9 40.5 3,404.91 6,180 35.4 43.1 3,312.78 0.9729 62 14,422 44.0 40.6 3,412.00 6,129 35.5 43.1 3,242.77 0.9504 63 14,397 44.1 40.8 3,305.91 6,068 35.6 43.3 3,252.74 0.9839 64 14,402 44.2 40.8 3,407.27 6,223 35.6 43.3 3,335.83 0.9790 65 14,351 44.1 40.8 3,295.35 6,075 35.7 43.3 3,214.20 0.9754 66 14,412 44.1 40.8 3,309.36 6,016 35.6 43.3 3,224.87 0.9745 67 14,489 44.2 40.9 3,327.04 6,034 35.7 43.4 3,234.52 0.9722 68 14,376 44.1 40.8 3,301.09 6,048 35.7 43.3 3,199.92 0.9694 69 14,428 44. 1 40.8 3,313.03 6,122 35.7 43.3 3,239.07 0.9777 70 14,325 44.0 40.7 3,289.38 6,038 35.6 43.2 3,194.63 0.9712 71 14,448 44.1 40.7 3,418.16 6,166 35.5 43.2 3,305.27 0.9670 72 14,443 44.0 40.7 3,316.47 6,005 35.5 43.2 3,218.97 0.9706 73 14,458 44.0 40.6 3,420.52 6,209 35.5 43.1 3,285.10 0.9604 200945741 14,335 44.0 3,391.42 6,065 3,251.13 75 14,443 76 14,407 44.0 3,308.21 5,949 ^,981 35.5 43.2 3,188.95 3,206^1 0.9586 一·——_ 0.9615 ------- 0.9691 77 14,438 3,315.33 6,148 78 14,428 43.9 79 14,438 43.9 7ήΓ]ϊ,313.03 3,214.86 5,955 5,874 80 14,458 43.9 3,319.92 6,049 35.4 412 ΙίΤ _81_ Mutual ~84 Shou 88 ~89 "90" 92 14,412 14,397 43J, 14,443 14.438 43⁄4 14,428 14,494 14,392 43^ 14,469 43j_ 14.438 14,448] 43 14,448 43? 14,458" 14,453 ~ 433_ 3,205.73 3,316.47 131533"15ΪΪ63" 3,328.18 3,204.62 3,322.44 3,315.33 3,317.62 3,117.63 6,070 5,855 6,097 ^,074 ^,891 5,984 5,827 5,902 1,949 5,913 6,092Μ60 6,007 6,007 6,205 35.4 35.3 35.3 35.3 43.0 4^〇_ ~4Ζ9 42.7

Mc (Vmin): feed water flow

Mh(l/min): generator cooling water flow & u ei^a/KC^ : 4.175 generator p water specific heat C:Pe (KJ/K (3*C〇: 4.177 feed water = hot Thin (C ): generator cooling water into water temperature Tcin (C): feed water inlet temperature Qh (KW): generator cooling water side heat dissipation Qc (KW): feed water absorption heat Q heat exchange amount = M flow rate xCp specific heat xdT in and out Water temperature difference Qc/Qh: heat recovery efficiency (./〇) 3,252.82 3^19ΖΪ7 3,148^75 3,242^6 3,253^81 3,138.56—Υ,225Τ84 3,213.67 3,116.85 3,207.71 3,123^5? 3J63T6 3,169.65 3,223.20 3^24845 3,153.64 3 ^09^59 3,052.77 3,023.80 0.9811 >9635~ ~^Τ9Α ^9767 ^983?~osm^~^sr2n ^9693" 0.9702 ^9638"~09747 ~〇3522 ~〇961? ^09554 ~〇3Ϊ\5 ^978 ? ^9775" ^9633~ ^979? ~03733

Th out(C): generator cooling water outlet temperature Tc out(C): feed water outlet temperature Table 4: Generator cooling water improvement work efficiency test record

Claims (1)

200945741 X. Patent application scope: 1. A structure for reducing the temperature of the generator cooling water to improve the efficiency of the unit, comprising: a generator cooling system having a plurality of generator coolers for cooling water circulation cooling, and a lubricating oil cooler having at least one cooling water circulation cooling, wherein a generator forced cooling fan group is disposed at a front end of the cooling water inlet of the generator cooling stomach and the lubricating oil cooler, and a front end of the fan group is provided with a controllable a control valve for circulating water; a heat recovery boiler feed water system having at least one condensate pump for feeding a feed water to a heat recovery boiler, wherein the feed water outlet of the condensate pump is connected to a Gale heat exchange for feed water preheating a water discharge heat exchanger is connected to the rear end of the Glan heat exchanger, and the feed water enters the heat recovery boiler after being preheated; a heat exchange device for heat exchange between the generator cooling water and the heat recovery boiler feed water The system is disposed between the generator cooling system and the heat recovery boiler j water system, and the heat exchange device includes a communication between the two cooling systems a cooling water inlet flowing to the control valve, a cooling water outlet connected to the forced cooling fan group of the generator to the cooling cooler, and the heat exchange device has a communication between the condensing water pump and the drain heat exchanger a feed water inlet and a water outlet; thereby, the cooling water and the feed water are exchanged in the heat exchange device. 俾 The cooling water is lowered to an appropriate temperature before entering the second cooler for cooling, and is fed. The water is preheated 12 200945741 to the appropriate temperature before entering the Grand Heat Exchanger. 2 Please patent (four)! The structure for reducing the temperature of the power generation tillage water to improve the efficiency of the unit, wherein the heat exchange device is provided with a plate type cooler for cooling heat exchange between the cooling water and the feed water (4) in the cooling H. 3. The structure for reducing the temperature of the cooling water of the generator according to the first aspect of the patent application, wherein the heat exchange device is a shell-and-tube cooler. ^ 4· The structure for reducing the temperature of the generator cooling water to improve the efficiency of the unit according to the scope of claim 1 of the patent application, wherein the generator forced cooling fan group comprises four motor-driven cooling fans. 5. The structure for reducing the temperature of the generator cooling water to increase the efficiency of the unit according to the fourth aspect of the patent application, wherein each of the cooling fans has four driving motors.结构 The structure for reducing the efficiency of the cooling water of the generator to improve the efficiency of the unit according to the first aspect of the patent application, wherein the Gran Heat exchange system is connected to the rear of the condensate pump, and the feed water flows through the grid heat exchanger Then enter the feed water inlet of the heat exchange device. 7. According to the claim 1, the lowering of the cooling water temperature of the generator to improve the efficiency of the start-up group, (4), the feed water of the cooked fruit first flows through the feed inlet of the heat exchange device for heat exchange, and then From the feed water outlet to the Grand Heat Exchanger. 13