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4

Systems

4.1

VTA Control (VCS)

Various controller variants are available in order to be able to cover all appli-

cations.
Detailed list of the components required for this:

See chapter 

Scope of supply

 / 

Scope of supply of VTA and equipment

.

VTA

Variable Turbine Area

VCS

VTA Control System

MPC

Multi Purpose Controller

MOP

Main Operating Panel

SACS

Scavenging Air Control Software

ECS

Engine Control System

For this application, parameters including the following are required for

adjustment of the VTA:

▪

Filling of fuel index transmitter or regulator

▪

Scavenge air pressure

These parameters are processed in the Multi-purpose controller (MPC) of the

VTA control system (VCS). The MPC supplies the VTA control system with

signals for adjusting the VTA.
The following parameters are output:

▪

Slow Down

▪

Warnings for the safety system

 

 

Explanation of terms

VTA on MC/MC-C

two-stroke engine

4 Systems

4.1 VTA Control (VCS)

2013-12-04 - de

4

MAN Diesel & Turbo

 

18 (38)

EN-US

Содержание VTA

Страница 1: ......

Страница 2: ......

Страница 3: ...ngine room planning 24 5 1 Equipment 24 5 2 VTA Control System VCS 24 5 3 Multi Purpose Controller MPC 25 5 4 Main Operating Panel MOP 25 5 5 Cabling 26 6 Operation 27 6 1 Putting into Operation 27 6...

Страница 4: ...Equipment 32 9 2 Hardware 32 9 3 Software 33 9 4 Cable Sets 33 10 Retrofits worldwide turbocharger service 35 10 1 Retrofitting a Variable Turbine Area 35 10 2 MAN PrimeServ 35 10 3 Worldwide service...

Страница 5: ...g the guide vanes of the turbine nozzle ring If adjusting the guide vanes makes the air flow cross section narrower this increases the speed of the air flow to the turbine wheel This increases the tur...

Страница 6: ...1 Adjustable turbine nozzle ring VTA 1 1 Range of applications 2013 12 04 de 1 MAN Diesel Turbo 4 38 EN US...

Страница 7: ...Fuel consumption slightly higher than Mode 1 In conjunction with a variable injection system and appropriate optimization the VTA enables reduced consumption and flexible changing between Mode 1 and M...

Страница 8: ...at partial load Compensation of ambient tem perature influences on charge pressure Closing on load application to prevent overgreasing Variation of the charge pressure to adapt to changing gas quali...

Страница 9: ...the scavenge air pressure see 2 stroke engine line and exhaust gas pressure Increased turbocharging effi ciency at a given power turbine output compared with power turbine control by means of bypass...

Страница 10: ...21V on 6S46MC C illustrates the mode of operation of the VTA on the 6S46MC C engine The upper green line shows the scavenge air pressure that is set when the VTA is closed towards partial load VTA clo...

Страница 11: ...rating is plotted with the exist ing specification optimized for full load With a closing nozzle ring a marked increase in the efficiency can be seen below 85 MCR In this case the margin to the requir...

Страница 12: ...iency optimized setting than a rigid turbine nozzle ring The resulting increase in charging efficiency with VTA compared with the bypass concept is illustrated in the diagram Improvement of the chargi...

Страница 13: ...FOC for a load of 100 for a standard L1 engine SFOC optimized load range Tuning method SFOC change g kWh 35 50 65 80 100 High load 85 100 Standard L1 engine 3 5 1 3 5 3 5 0 Partial load 50 85 VTA 0 5...

Страница 14: ...e 4 0 2 5 3 0 Partial load 50 85 VTA 2 2 4 5 4 2 Low load 25 70 VTA 1 3 5 5 3 1 Standard L1 engine turbocharger without adjustable turbine nozzle ring VTA turbocharger with adjustable turbine nozzle r...

Страница 15: ...methods specified above are also available for derated engines with various SMCRs The load dependent standard SFOC profile is different for a derated engine the difference specified above between the...

Страница 16: ...ts for the VTA controller See chapter Systems VTA control Dimensions and installation of the required control cabinets See chapter Engine room planning 2 3 Weights Subassembly Turbocharger Number Desi...

Страница 17: ...r TCA turbochargers See Project Guide TCA Turbochargers The adjustment device for the turbine nozzle ring is fastened to the gas admission casing and cannot be rotated separately The servomotors of th...

Страница 18: ...turbine nozzle ring 510 000 have the same profile as the fixed nozzle ring in order to benefit from the advantages of low vibration and good flow characteristics Adjustment Device The principal compo...

Страница 19: ...rives is transferred to the carriers fastened to the setting ring thereby inducing a rotational motion of the set ting ring There are setting levers evenly distributed around the circumference one set...

Страница 20: ...re ECS Engine Control System For this application parameters including the following are required for adjustment of the VTA Filling of fuel index transmitter or regulator Scavenge air pressure These p...

Страница 21: ...gine With this variant the VTA control system is completely integrated into the engine control system Engine and turbocharger are supplied as an opera tional unit The stand alone solution can work ind...

Страница 22: ...r the adjustment logic are know how of the engine manufacturer and are loaded into the control system via the USB interface or CD ROM See schematic diagram Wiring diagram VTA control system VCS for st...

Страница 23: ...f the gas admission casing See chapter Overview of series Casing positions Turbocharger Outside diameter D for con necting pipe in mm Thread G of the screwed socket TCA55 16 M22 x 1 5 TCA66 16 M22 x 1...

Страница 24: ...ne S S A A 510 010 510 021 510 020 510 030 510 001 E E E E E 510 001 Guide ring outer 510 021 Guide ring inner E Exhaust gas 510 010 Turbine guide vane 510 030 Sealing cover S Inflation air 510 020 Re...

Страница 25: ...mm mm TCA55 16 2 113 TCA66 16 2 113 TCA77 20 2 201 TCA88 20 2 201 Table 13 Pipe connection for the sealing air system 549 000 501 001 510 020 501 001 Gas admission casing 510 020 Holding ring 549 000...

Страница 26: ...rthermore the cabinet should be provided with fresh air by the engine room ventilation system The ambient temperature during operation must be at least 0 C and must not exceed 55 C The relative humidi...

Страница 27: ...4 Main Operating Panel MOP The main operating panel MOP consists of a monitor a computer and a keyboard The computer keyboard and monitor are designed for installation in the engine control room Clear...

Страница 28: ...c cable lengths are possible by shortening the cables on the control cabinet side see operating manual of the turbocharger The cables must not be shortened on the servomotor side The bending radii mus...

Страница 29: ...fied Table 16 VTA turbine nozzle ring adjustment speeds 6S46MC C engine TCA55 turbocharger Ratio ADmax ADmin 2 1 2 Duration of adjustment of specified adjustment range in s 2 5 2 AD narrowest flow cr...

Страница 30: ...TA control system is no longer supplied with power the brakes cannot be released without removing the servomotors Once the brakes have been released the turbine nozzle ring can be adjusted manually Th...

Страница 31: ...engine plant Following this cleaning procedure the original flow cross section is restored In this way any deposits on the components are efficiently removed NOTE The profile of the cleaning procedur...

Страница 32: ...e flow cross section These limit values are determined by the mechanical limits of the adjusting mechanism and the permissible stress on the turbine blades Moreover the following limits resulting from...

Страница 33: ...ad shedding test of the two stroke engine 1 Load reduction from 75 to 25 within 10 seconds for checking the surge stability in closed condition of the VTA whereby the maximal igni tion pressure must n...

Страница 34: ...ain Operating Panel SACS Scavenging Air Control Software ECS Engine Control System 9 2 Hardware VTA Two stroke diesel engine Four stroke diesel engine Stand alone Scope of supply Hardware MC MC C ME M...

Страница 35: ...C ME B Scavenge air control soft ware SACS for MPC and MOP Part of the engine plant specification VTA control software for fre quency inverter in VCS Scope of supply of MAN Diesel Turbo Table 19 Scop...

Страница 36: ...r connecting cable VCS YA YA YA YA Power connecting cable MPC YA Power connecting cable PC MOP YA Power connecting cable Screen MOP YA EB YA Scope of supply of MAN Diesel Turbo Is a component of the E...

Страница 37: ...dieselturbo com Internet www mandieselturbo com primeserv PrimeServ Turbocharger Technical service Tel 49 821 322 4010 Axial turbochargers 24 hours Tel 49 821 322 4020 Radial turbochargers 24 hours Fa...

Страница 38: ...Technical information Tel 49 821 322 1345 Fax 49 821 322 3299 e mail Turbochargers mandieselturbo com Internet http www mandieselturbo com turbocharger 10 3 Worldwide service addresses MAN Diesel Tur...

Страница 39: ...27 Dimensions Turbocharger with VTA 2 2 14 E Economy Mode 1 1 5 ECS Definition 4 1 18 9 1 32 Electromagnetic compatibility 5 5 26 Emergency operation 6 3 27 Emission Mode 1 1 5 Engine Control System 4...

Страница 40: ...6 1 27 Subassemblies Weights 2 3 14 Subassembly characteristics 3 1 16 Surge Test 8 3 31 Switch box Multi purpose controller MPC 5 3 25 T Thermal efficiency 1 2 10 Turbocharger efficiency 1 2 9 V VCS...

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