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21. 发明专利

JPH0363597A NUCLEAR REACTOR PRESSURE REGULATING DEVICE 失效
公开(公告)号：JPH0363597A
公开(公告)日：1991-03-19
申请号：JP19940689
申请日：1989-08-02
申请人： HITACHI LTD
发明人： NAKAHARA MITSUGI
IPC分类号： G21C17/032 , G21D3/08 , G21D3/12
摘要： PURPOSE:To suppress neutron flux variation by detecting the variation rate of the reactor core flow rate of a nuclear reactor, and comparing the variation rate with a permissible variation rate and regulating the pressure of the nuclear reactor. CONSTITUTION:The reactor water flow rate signal S1 of the nuclear reactor detected by a reactor core flow rate detector consisting of a differential manometer is inputted to the nuclear reactor pressure regulating device. The nuclear reactor pressure regulating device performs specific arithmetic for the reactor core flow rate signal S1 to obtain a nuclear reactor pressure regulating signal S2. Namely, a detecting circuit 161 detects the variation rate of the signal S1, a decision circuit 162 compares the detected value with the permissible variation rate of the reactor core flow rate, and an incomplete differentiating circuit 163 performs incomplete differential arithmetic for the output signal of the circuit 162 according to the result to obtain the signal S2.

22. 发明专利

JPS6390605A CONTROL DEVICE FOR STEAM GENERATING PLANT 失效
公开(公告)号：JPS6390605A
公开(公告)日：1988-04-21
申请号：JP23464486
申请日：1986-10-03
申请人： HITACHI LTD
发明人： AKIYAMA KOSEI , KINOSHITA MITSUO , NAKAHARA MITSUGI
IPC分类号： F22D1/32 , F01K7/38 , F01K13/02 , F22B35/00 , G21D3/00 , G21D3/12
摘要： PURPOSE:To prevent thermal shocks, by compensating a demand signal for changing the output of a steam generating device, which is to be delivered to a means for controlling the output of the steam generating device, in accordance with an extracted steam amount demanding signal so as to enable the lowering of the temperature of feed water to be restrained by controlling the control means. CONSTITUTION:Steam generated from a nuclear pressure vessel 7 flows through a high pressure turbine 14, a moisture separator 17 and a low pressure turbine 15 into a condenser 18, and therefore, the turbines 14, 15 are rotated to drive a generator 16. Condensate is returned into the pressure vessel 7 through feed water heaters 19, 20 by means of a water feed pump 21. In this case, steam extracted from the low pressure turbine 15 is fed into the feed water heaters 19, 20 through extracted steam valves 24, 25 which are controlled by means of an extraction amount distributor 23 in accordance with an extraction steam demand signal which has been computed by an extraction valve controller 22 in accordance with the rotational speed of the turbines. Further, an adder 27 compensates a demand signal EPLR for changing the output of the steam generating device in accordance with the extracted steam demand signal.

23. 发明专利

JPS6371695A OUTPUT CONTROLLER FOR NUCLEAR POWER PLANT 失效
公开(公告)号：JPS6371695A
公开(公告)日：1988-04-01
申请号：JP21579986
申请日：1986-09-16
申请人： HITACHI LTD
发明人： NAKAHARA MITSUGI , AKIYAMA KOSEI , KINOSHITA MITSUO
IPC分类号： F01K7/38 , F01K9/04 , F01K13/02 , G21D3/00 , G21D3/04

24. 发明专利

JP2003095615A APPARATUS FOR PRODUCING HYDROGEN 审中-公开
公开(公告)号：JP2003095615A
公开(公告)日：2003-04-03
申请号：JP2001283178
申请日：2001-09-18
申请人： HITACHI LTD
发明人： ARAKI HIDEFUMI , NAKAHARA MITSUGI , CHINO KOICHI
IPC分类号： F25J3/02 , C01B3/02 , C01B3/38 , C01B3/48 , C01B3/50 , H01M8/06
摘要： PROBLEM TO BE SOLVED: To provide an apparatus for producing hydrogen from which hydrogen having extremely low residual concentration of carbon monoxide and suited for a cell fuel can be taken out. SOLUTION: The apparatus 1 for producing hydrogen separates hydrogen from crude gas containing at least a hydrocarbon and carbon monoxide in addition to hydrogen through cryogenic separation method. The apparatus is provided with a raw material compressor 51 for compressing a raw material, a main heat exchanger 2 for cooling the compressed raw material gas, a hydrocarbon separator 5 for liquefying and separating hydrocarbon from the cooled raw material gas, and a carbon monoxide separating tower 6 for liquefying and separating carbon monoxide from the separated gas with the hydrocarbon separator 5. The carbon monoxide separating tower 6 is provided with a fluid supply means for supplying nitrogen fluid having a boiling point higher than that of hydrogen and lower than that of carbon monoxide, into the interior of the top thereof.

25. 发明专利

JP2002039694A HEAT STORAGE/COLD STORAGE RESERVOIR 失效
公开(公告)号：JP2002039694A
公开(公告)日：2002-02-06
申请号：JP2000231397
申请日：2000-07-27
申请人： HITACHI LTD
发明人： KITO KAZUAKI , FUJII TADASHI , CHINO KOICHI , NAKAHARA MITSUGI , ARAKI HIDEFUMI
IPC分类号： F02C6/14 , F24F5/00 , F28D20/00
摘要： PROBLEM TO BE SOLVED: To improve system efficiency in heating/cooling operation in a heat storage/cold storage reservoir with the aid of designs on installation and on operation control. SOLUTION: A heat storage/cold storage reservoir is divided into at least two or more units. At least 1 or more bypass tubes are provided on the unit located on the side of ordinary temperature and the unit located on the side of a low temperature fluid, and further a temperature sensor for measuring fluid temperature and a temperature sensor for measuring the temperature of a heat storage/cold storage material. The fluid temperature and the heat storage/cold storage material temperature are monitored to control opening and closing of the bypass tubes, whereby the heat storage/cold storage reservoir units to which a fluid is supplied are switched in order to keep the air temperature and the heat storage/cold storage material temperature in a predetermined range.

26. 发明专利

JP2001115856A EXHAUST GAS WATER RECOVERING DEVICE AND GAS TURBINE POWER GENERATING EQUIPMENT 失效
公开(公告)号：JP2001115856A
公开(公告)日：2001-04-24
申请号：JP29339399
申请日：1999-10-15
申请人： HITACHI LTD
发明人： HATAMIYA SHIGEO , NAKAHARA MITSUGI , NUMATA SHOHEI
IPC分类号： F02C7/00 , F02C3/30
摘要： PROBLEM TO BE SOLVED: To provide a water recovery device having structure with reduced pressure loss by reducing the possibility of increase of the back pressure of a turbine and reduction of the output and the efficiency of a gas turbine due to the increase of a pressure loss resulting from the installation of a water recovery device when the water recovery device is installed on the exhaust side of a gas turbine. SOLUTION: This water recovering device 12 for recovering moisture in exhaust gas is constituted such that a flow of cooling water and exhaust gas is set in a direction of gravity. This constitution causes induction of exhaust gas by liquid drops and increases an exhaust gas pressure on the outlet side.

27. 发明专利

JP2000180092A HEAT EXCHANGER 失效
公开(公告)号：JP2000180092A
公开(公告)日：2000-06-30
申请号：JP35866898
申请日：1998-12-17
申请人： HITACHI LTD
发明人： ARAKI HIDEFUMI , CHINO KOICHI , NAKAHARA MITSUGI
IPC分类号： G01F1/00 , F28D9/00 , F28F27/00 , G01M3/00
摘要： PROBLEM TO BE SOLVED: To obtain a heat exchanger in which leakage is minimized, if any, heating side fluid is prevented from being mixed with fluid on the side to be heated and detection of leakage is facilitated by providing a buffer channel between a heating side channel and a channel on the side to be heated and providing the buffer channel with a leak detection mechanism. SOLUTION: A buffer channel 23 is provided between the heating side channel 20 and the channel 21 on the side to be heated of a plate fin type heat exchanger. These channels are sectioned by means of a tube plate 25 and a spacer 26 having different shape from channel to channel. A corrugated fin 28 is brazed to the tube plates 25 on the opposite sides in the channel between the tube plates 25. The buffer channel 22 is provided is provided with a pressure gauge which can measure pressure variation on line. According to the structure, leaked fluid, if any, stands in the buffer channel 22 and heating side fluid is prevented from being mixed with fluid on the side to be heated.

28. 发明专利

JPH11258384A CONTROL INFORMATION PROVIDING DEVICE 失效
公开(公告)号：JPH11258384A
公开(公告)日：1999-09-24
申请号：JP5642998
申请日：1998-03-09
申请人： HITACHI LTD
发明人： NAKAJIMA AKIYOSHI , NAKAHARA MITSUGI
IPC分类号： G06F11/32 , G21C17/00 , G21D3/00
摘要： PROBLEM TO BE SOLVED: To help easily grasp whether the output signal of a main controller in an operation state is normal or not by comparing the relation between a main controller output signal value and an operation process value with operation result data. SOLUTION: Reactor output, a water-supply discharge header pressure, and a reactor pressure are inputted to an extraction means 8, and the past operation cycle result data of a plant state corresponding to it are extracted from a database 6. Data are created so that a result region can be displayed based on a group of the extracted result data. In this case, by displaying a rectangular region, the result region is shown and is compared with a plotted point according to a process value on current operation, thus fully putting together information regarding a plant control system and information regarding the plant with improved balance and supporting the monitoring of the validity or the like of a main controller output signal value for the current operation state.

29. 发明专利

JP2515797B2 失效
公开(公告)号：JP2515797B2
公开(公告)日：1996-07-10
申请号：JP11686487
申请日：1987-05-15
申请人： HITACHI LTD
发明人： NAKAHARA MITSUGI
IPC分类号： G21D3/12 , F01D17/00 , F01D17/20 , F01K9/04 , F01K13/02 , G21D3/00

30. 发明专利

JPS63204003A STEAM GENERATION PLANT OUTPUT CONTROLLER 失效
公开(公告)号：JPS63204003A
公开(公告)日：1988-08-23
申请号：JP3557187
申请日：1987-02-20
申请人： HITACHI LTD
发明人： NAKAHARA MITSUGI , AKIYAMA KOSEI
IPC分类号： G21D3/12 , F01D17/20 , F01K13/02 , F22B1/06 , F22D1/32

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