Saturday, 2 February 2013

SULZER specifications & its easy to understand,made easy...........

            When looking at Sulzer engine’s specifications, there is always some ambiguity. MAN B&W is very clear with its specifications, however Sulzer never gave one. That doesn’t mean MAN B&W is better than Sulzer engines.

Here myself  have dug deep to find out these specifications from various sources right from Wartsila NSD to Various Marine Text books.

Sulzer AG, a Swiss company, started in 1834 by the Sulzer brothers.

Want to know who were Sulzer Brothers?


It’s Mr.Salomon Sulzer and Mr. Bernet who formed Sulzer Brothers Limited first in 1775 and then established as Sulzer Ltd. A known employee of Sulzer was Rudolf Diesel, who invented the Diesel Engine.

In 1990, Sulzer spun off the diesel engine division into a separate company named “New Sulzer Diesel” (NSD) and sold most of the shares.  In 1997 NSD was absorbed by Wartsila, creating Wartsila NSD.

The Sulzer brand among seafarers particularly known in connection with the Sulzer RTA engines, the most reliable series of Sulzer engines that was first built in 1982. 

Other engine types that are still in use, the RND, RND-M and the RL series. Wartsila Sulzer RTA96-C, the biggest engine in the world and the 14 cylinder RT-flex 96C delivers a total output of 108,920 hp at 102 rpm. The machine is over 23 meters long. Below table shows complete series of engines which Sulzer has developed over a century.

Year
Type of Engine
Cylinder diameter in cm
1908 – 1931
S
18 – 90
1908 – 1932
Z (ZA, ZF, ZPF, ZT)
52,60,65,68,72,76
1929 – 1937
DZ (DZL, DZD)
60,70,76
1929 – 1937
SN
48
1930 – 1946
DS (DSD, DSDT, DSDG, MSD, KD)
53,60,70,72,76
1932 – 1964
SD (SDT, SPD, MS, KD, SDS, SDH, SF)
36,40,48,49,56,58,60,65,68,72,76
1934 – 1954
ZD (ZDA)
58,76
1950 – 1963
RS (RSD, RSG, RSAD)
58,76
1950 – 1963
SAD
60,72
1956 – 1987
RD (RD, RF)
44,56,68,76,90
1967 – 1981
RN (RND, RNF, RNMD)
68,76,90,105
1976 – 1989
RN M (RND M, RNF M)
68,76,90
1977 – 1988
RL (RLA, RLB)
56,66,76,90
1982 - 
RT (RTA,RTA M, RTA C, RTA U, RTA T)
38,48,52,58,62,68,72,76,84,96
1998
RT Flex
48,50,58,60,68,82,84,96


The letter ‘R‘ in the engine designations goes back to the Sulzer RSD two-stroke low-speed engine types introduced in 1950. The letter ‘R‘ stood for ‘Revidierter’, so the RSD types were ‘revised’ versions of the SD engine types that had been developed since 1930. Built in two bore sizes, 58 and 76cm, the RSD engines were the first two-stroke low-speed engines designed and built by Sulzer that had fully welded structures (columns and bedplates). Turbocharged versions followed in 1956 with the RSAD engine types.

The letter ‘R‘ was then retained over the following years in the RD, RND, RND..M, RLA, RLB, RTA and RT-flex engine types. Yet after the RSD and RSAD designations, the letter lost any connotation of ‘revised’. It was simply kept as an easily-recognised identifier for Sulzer low-speed engines. When electronically-controlled common-rail systems were applied in 1998, the designation RTA was adapted to RT-flex to emphasise the key feature of flexibility given by the new technology.’

Parameters
RD
RND
RTA
RT-FLEX
Turbocharger
Pulse (No auxiliary Blower)
Constant Pressure
Constant Pressure
Constant Pressure
Scavenging
Loop
Loop and Under piston space
Uni flow
Uni flow
Exhaust valve
Rotary flap valve
Exhaust ports
Hydraulic operated
Hydraulic operated
Stroke Bore Ratio
1.7
1.7
3 to 4.2
Piston
Convex shape
Convex shape
Concave shape
Concave shape
Piston cooling
Water
Water
Oil
Oil
Fuel pump
Suction valve control, no spill valve
Suction valve and spill valve
Suction valve, spill valve and VIT
Common rail system (jerk type)
Drive
Chain
Gear
Gear
Gear
Cylinder Lubrication
Mechanical drive
Mechanical drive
Load dependent, Electric motor driven
Cylinder quills
Quills at upper part
Quills only at upper part
Quills at two level
Cross head bearing
Two piece type
Two piece type
Continues bottom half type
Continues bottom half type
Piston skirt
short
Long
Short
Short
SFOC
208 g/bhp/hr
203 – 208
115
118
MEP
8.6
10.6 – 12.3
17
19.5
Peak Pressure
76 bar
84 – 94 bar
140 bar
150 bar
Power/ cycle
1700 KW
2100 – 2500 KW
3700 KW
2100 – 5720 KW
Piston Speed
6.1 m/s
6.3
8
8 – 8.5
  
This blog is made out at the end of lots of collection from various sources inorder to made it easy to my readers.........Stay and read my blogs, the next blog will be on MAN B&W history and specifications.......