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<FEATURE>Compressor Technology |
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Recent Trend of Compressorss |
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Shuzo MORI
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Analysis Technology of Rotor Profile for Screw Compressors |
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Dr. Shoji YOSHIMURA
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The performance and vibration of a screw compressor are closely related to its rotor profile. However, it is
not clear how profile functions affect them. In this paper, general characteristics of profile function are made
clear and their application is shown. Based on the characteristics, a program which calculates the
performance, design dates, etc in a short time, has been developed.
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Technology for Reliability Improvement of Oil-flooded Screw Compressors |
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Dr. Shoji YOSHIMURA |
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In large size and high pressure oil-flooded screw compressors, some problems occur. In order that large
force acts on the rotors, impact vibration between the male and female rotors is induced and large force acts
on the bearings. The process gas and lubricating oil are in direct contact with each other in the compression
pressure process. Also oil viscosity falls. To overcome these problems, some new technologies have been
developed.
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Perforated Panel Type Silencer for Screw Compressors |
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Yasumasa KIMURA / Zenzo YAMAGUCHI / Toru SAKATANI
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The new type silencer using perforated panel for sound absorbing structure was developed. The sound
absorbing effect caused by the micro hole in a thin panel was applied to a silencer. Sound absorbing
structure by a perforated plate doesn't have as much a bad influence on the environment as acoustic material
of conventional fiber-form, and there is durability. Since this perforated plate type silencer is used for oil-free
screw compressor, a practical example is introduced.
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| 17 |
High Pressure 100barG Oil-flooded Screw Compressor |
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Yasushi AMANO |
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Kobe Steel has developed a high pressure oil flooded screw compressor. A discharge pressure up to
100barG is achieved by using original rotor technology, larger bearings, and special mechanical seal. The
compressor, with its high performance and reliability, is suitable for fuel gas boosting, in particular, for
highly efficient gas turbines. The compressor is expanding its applications and is practically used for
desulfurization of fuel. The compressor's application is expected to grow further.
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World's Largest Capacity Oil-free Screw Compressor "MODEL KS80" |
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Shugo TAKAKI / Yoshikazu OE
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Large capacity oil-free screw compressors are mainly used in petrochemical plants such as styrene
monomer, and linear alkyl benzene plants, where suction and discharge pressures are relatively low and
large capacity is needed. Recently, these plants have tended to become larger and the requested capacity to
the compressor also has tended to become larger. To satisfy such a market needs, we have developed the
world's largest capacity oil-free screw compressor "Model KS80" by using the design technology and
manufacturing technique of the large screw compressor. In this paper, the design concepts and features of
"Model KS80" are introduced.
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| 24 |
Micro Steam Energy Generator |
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Hideaki KUWABARA / Makoto NISHIMURA / Masaki MATSUKUMA /
Takayoshi MATSUI
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Small-sized steam plants are widely prevalent in the industrial world. In such plants, change of steam flow,
small amount of steam, and low-pressure steam prevent energy saving. For this reason, a screw type small
steam generator has been developed, which is called "micro steam energy generator". This machine enables
effective use of steam in small-sized steam plants and promotes further energy saving and CO2 reduction.
This machine has improved power output, which is 132kW and 160kW. It also has two specification, one is
the high pressure difference type and the other is the low pressure difference type. Furthermore, 58~74%
of efficiency was realized in the 132~160kW class steam turbine. The test results of this generator are
shown in this paper.
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| 29 |
High Performance Large Class Oil-free Screw Compressor |
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Kiyonori IZUTANI
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High performance and energy saving equipment is required, because of the growing interest in
environmental issues. Therefore, Kobe Steel has developed the high performance large class standard oil
free screw compressor; Emeraude-ALE. This report introduces the new compressor which combines high
efficiency, economic and reliable functions.
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| 33 |
Inverter-motor Driven, Water-injected, Oil-free Screw Air Compressor;
EmerauDe- Aqua® Series |
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Junichiro TOTSUKA / Toru NOGUCHI
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Kobe Steel has developed a series of oil-free screw air compressors; the EmerauDe-Aqua series, which uses
water injected during compression for sealing and cooling of elements. Each compressor employs Kobe
Steel's original non-contact screw, along with an IPM high-speed motor driven by an inverter and connected
directly with the screw rotor, so as to assure high performance for a wide range of flow volume.
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| 36 |
Large-sized 2-stage Oil-flooded Air Compressors |
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Toshiyuki MIYATAKE / Terumasa KUME
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Today, superior energy-saving characteristics of the compressor are demanded in increasing awareness of
environmental issues. Kobe Steel has developed the large-sized 2-stage oil-flooded air compressor Kobelion®-
LT/ST series which has superior energy-saving characteristics. In this paper the main feature and key
technologies of these compressors are introduced.
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| 39 |
Energy Saving High-speed Screw Brine Cooler |
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Eiji KANKI / Katsuyuki SUZUKI / Noboru TSUBOI / Keisuke TANAKA /
Masashi OKURA |
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Energy saving high-speed screw brine coolers driven by inverter control have been developed. By adopting
a new control method of linking the compressor speed to the compressor suction pressure, 40% more
cooling capacity can be generated at -35°C brine temperature. Furthermore, 35% energy saving can be
achieved at 50% part load compared to our conventional brine cooler. This machine can be used for a wide
range of brine temperatures from +5°C to -55°C and for applications of freezing food, freeze-drying,
environmental test rooms, process cooling, and more.
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| 43 |
Gas Energy Recovery Radial Turbine Generator System |
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Osamu MATSUTANI
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Gas energy recovery power system is an eco-friendly system which produces lower CO2 emissions by using
gas pressure difference. It is expected to be wide spread in future. Also, our radial turbine plays a key part in
the technology of power recovery. This paper introduces this energy recovery system, our unique turbine
technology and furthermore items to be considered for future sales expansion.
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| 47 |
DH Cycle Gas Compressor for Polyolefin |
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Hiroaki TANAKA
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According to the recent growth of polyethylene (PE) and polypropylene (PP) demands, lots of plants have
been constructed and are still being planned. Furthermore, plant capacity is increasing year after year to
achieve high plant performance. Kobe Steel has developed and improved compressors to meet the
requirements through the years. This paper reports on the cycle gas compressor that is one of the most
important apparatus, especially for construction; its special features and also describes prospects for the
future.
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| 51 |
Integrally Geared Centrifugal Compressors for High Pressure Process Gas Services |
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Keiichi SAEKI / Hiroki SANARI / Yoshitaka BABA / Mitsuhiko ITO /
Toshihisa SHIBATA / Dr. Michiya KUROHASHI
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The High Pressure SUPER TURBO, an integrally geared centrifugal compressor for high pressure process
gas services, has been developed. The compressor design was modified to acquire maximum stability of the
rotor for high pressure application, and the analysis result met the requirements of API standards. The full
load running test was performed over 80Bar discharge pressure, and confirmed enough rotor stability by
verifying low rotor vibration and low temperature rise of bearing pads. This result has expanded high
pressure application coverage of integrally geared centrifugal compressors, and could be applied to the main
market of process gas services.
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| 55 |
Reciprocating Process Compressor |
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Naoki AKAMO
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In order to improve energy consumption, plants, such as oil refinery, petrochemical, energy and gas
industry, are getting larger and process operating pressures are increasing. This paper describes the
features of the heavy duty reciprocating compressor used for oil refinery and cryogenic service,and recent
technology of the step-less capacity control device.
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TOPICS |
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Shapematic® Roller and System for Strip Rolling Mill |
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Haruyuki HOSOKAWA / Toshimitsu TAKAHASHI / Kenichi UESUGI /
Masato TANAKA
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In recent years rolling material has become more highly resistant to deformation and thinner, which causes
difficulty in stable mill operation; requiring flatness measuring high-accuracy sensors and its control system.
Since 1984 we have been supplying the “Shapematic Roller” as the flatness measuring sensor and the
“Shapematic System” as the controller of the rolling mill based on flatness; receiving just evaluations of high
accuracy and reliability. The “Shapematic System” is now applied to various types of rolling mills along with
our unique technology and close follow-up for the customer.
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| 66 |
Papers on Advanced Technologies for Compressor Technology in R&D Kobe Steel Engineering
Reports (Vol.49, No.1~Vol.59, No.2)
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