scholarly journals Cogeneration and Multiple Heat Recovery at a Plastics Manufacturing Facility

1984 ◽  
Author(s):  
J. Davidse ◽  
A. P. van Ooststroom
Keyword(s):  
Control System ◽  
Heat Recovery ◽  
Energy Production ◽  
Cogeneration Plant ◽  
Manufacturing Facility ◽  
The Public ◽  
Medium Pressure ◽  
Pressure Steam ◽  
Thermal Oil

This paper describes the process of the integration of a cogeneration plant in a plastics manufacturing complex, which is being expanded. It presents the background against which the decision to proceed was made, the alternatives considered, and some of the techniques utilized to obtain management approval. It also describes the specific aspects of the cogeneration facility, fuels, heat recovery systems for thermal oil and medium pressure steam, the balancing between energy production and utilization in the complex and the control system for the optimization of the facility. Also some energy typical aspects of connecting the generator to the public grid will be addressed.

Design and Experimental Implementation of Longitudinal Control for a Platoon of Automated Vehicles

1998 ◽  
Vol 122 (3) ◽  
pp. 470-476 ◽  
Author(s):  
R. Rajamani ◽  
S. B. Choi ◽  
B. K. Law ◽  
J. K. Hedrick ◽  
R. Prohaska ◽  
...  
Keyword(s):  
Control System ◽  
Torque Converter ◽  
Stable Operation ◽  
Automated Vehicles ◽  
Longitudinal Control ◽  
The Public ◽  
Automated Highways ◽  
Experimental Implementation ◽  
Special Challenge ◽  
Upper Level

This paper presents the design and experimental implementation of a longitudinal control system for the operation of automated vehicles in platoons. The control system on each vehicle is designed to have a hierarchical structure and consists of an upper level controller and a lower level controller. The upper controller determines the desired acceleration for each vehicle in the platoon so as to maintain safe string-stable operation even at very small intervehicle spacing. The lower controller utilizes vehicle-specific parameters and determines the throttle and/or brake commands required to track the desired acceleration. A special challenge handled in the design of the lower level controller is low-speed operation that involves gear changes and torque converter dynamics. The paper also presents the design of longitudinal intra-platoon maneuvers that are required in order to allow any car in the platoon to make an exit. The paper presents extensive experimental results from the public NAHSC demonstration of automated highways conducted in August 1997 at San Diego, California. The demonstration included an eight-car platoon operating continuously over several weeks with passenger rides given to over a thousand visitors. The maneuvers demonstrated included starting the automated vehicles from complete rest, accelerating to cruising speed, allowing any vehicle to exit from the platoon, allowing new vehicles to join the platoon and bringing the platoon to a complete stop at the end of the highway. [S0022-0434(00)01903-1]

scholarly journals Development and verification of control system for heat recovery ground source heat pump system

2018 ◽  
Author(s):  
Takao Katsura ◽  
Yutaka Shoji ◽  
Yoshiki Miyashita ◽  
Katsunori Nagano ◽  
Yasushi Nakamura
Keyword(s):  
Control System ◽  
Heat Pump ◽  
Heat Recovery ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source

The Upgrading of the Combined-Cycle Cogeneration Plant with Heat-Recovery Steam Generators for Large Cities of the Russian Federation

2021 ◽  
Vol 68 (2) ◽  
pp. 110-116
Author(s):  
M. A. Vertkin ◽  
S. P. Kolpakov ◽  
V. E. Mikhailov ◽  
Yu. G. Sukhorukov ◽  
L. A. Khomenok
Keyword(s):  
Russian Federation ◽  
Heat Recovery ◽  
Combined Cycle ◽  
Cogeneration Plant ◽  
Steam Generators ◽  
Large Cities ◽  
The Russian Federation

scholarly journals ANALISIS KERUSAKAN DAN PERBAIKAN OIL PUMP STEAM TURBINE 32-K-101-P1-T DALAM PLATFORMING UNIT-NAPHTA PROCESSING UNIT (NPU)

ROTASI ◽  
2016 ◽  
Vol 18 (2) ◽  
pp. 44
Author(s):  
Norman Iskandar ◽  
Ardha Ridho Pangeran
Keyword(s):  
Steam Turbine ◽  
Ball Bearing ◽  
Low Pressure ◽  
Processing Unit ◽  
Medium Pressure ◽  
Oil Pump ◽  
Carbon Ring ◽  
Pressure Steam ◽  
Split Face

Oil pump steam turbine (OPST) adalah sebuah turbin uap jenis impuls yang digerakan oleh medium pressure steam (MPS) dengan tekanan 15–21 kg/cm2G dan temperatur kerja 250–370 oC. Uap ekstrasi dari turbin uap adalah low pressure steam (LPS) dengan tekanan 3.8–6.3 kg/ cm2G. Dalam proses perawatannya, OPST diinspeksi setiap 2 minggu sekali dengan melihat kondisi oli, trending getaran, dan putaran poros turbin. Pada saat operasi OPST mengalami kenaikan vibrasi yang melebihi batas toleransi (vs 2.82 mm/s) dan keruhnya oli pelumasan OPST. Dalam hal ini dilakukan sebuah penelitian guna mengetahui indikasi kerusakan OPST dan analisis perbaikan yang tepat guna mengembalikan performa dari OPST. Dalam mengidentifikasi kerusakan tersebut metode yang dilakukan adalah analisis trending spektrum menggunakan software omnitrend yang nilainya akan dibandingkan dengan hasil perhitungan bearing. Analisis tersebut menghasilkan bahwa terjadi vibrasi 1X RPM dikarenakan kerusakan pada ball bearing yang diakibatkan oleh pelumas bearing yang sudah keruh karena tercampur air. Untuk mengetahui masuknya air ke dalam oil chamber dilakukan dua cara yaitu percobaan hydrotest dan pengukuran clearances carbon ring seals. Setelah dilakukan dua percobaan tersebut didapatkan hasil penyebab masuknya air ke oil chamber karena overclearances pada carbon ring seals (vs 0.120-0.145 mm). Masalah yang terjadi ini mengakibatkan uap masuk ke penampungan oli sehingga pelumasan pada bearing tidak berjalan dengan baik sehingga terjadi kerusakan pada bearing. Setelah teridentifikasi kerusakannya, dilakukan pergantian komponen bearing inboard dan bearing outboard serta laping split face pada carbon ring seals. Setelah mengalami perbaikan vibrasi pada OPST kembali normal dari 3.72 mm/s menjadi 0.93 mm/s.

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