Wartsila Engine Gensets

Wärtsilä power plant portfolio includes baseload, CHP, peaking, mechanical drives and biopower - anything from floating barge power stations to decentralized units suitable for urban areas.

High efficiency, fuel flexibility and modular design allow for truly competitive power production anywhere in the world. Backed up with a complete range of services, our customers get profitable solutions from a full energy supplier.

Wärtsilä is one of the leading decentralized power solution provider in the world by delivering power plants from 1-300 MW. These power plants are used for base load, peak load, combined heat and power (CHP), standby, mechanical drives and renewable energy applications. The range covers gas and oil fired power plants as well as patented combustion technology for renewable fuels like biomass, or even emulsified fuels.

CHP plants utilize the thermal energy produced by the engine cooling system and exhaust gas, to increase efficiencies drastically – from 40% to 90% efficiency, in some cases.

The Wärtsilä CHP power plant is typically 2 - 250 MW, designed to operate both in industrial and residential areas at the highest operating efficiency and lowest specific emission levels possible. Typically natural gas fired for its environmental friendliness, these CHP plants offer an economical and compact solution for electricity plus heating, the industrial use of steam and hot water, or production of chilled water for air conditioning. In some industrial applications, it may even be directly injected to the manufacturing process. Aesthetic appearance, adaptability, and low noise emissions have made it possible for customers to locate the plant in the heart of the heat load – in the middle of a city or at industrial plant sites.

NOTE: Wartsila has a joint marketing agreement in the US with Cummins. Combined Energy Systems is a co-operative effort between Wärtsilä NSD North America and Cummins Power Generation America. CES markets and sells both Wärtsilä and Cummins gas engines in North America.

 

Specifications
12V220SG
12V34SG
18V32DF
12V46GD
18V50DF
Electric Production (kW)
1,860
3,821
5,819
11,349
16,587
Nat Gas Fuel Input (MMBTUs/Hr)
14.7
28.6
44.5
82.8
118.2
Electric Efficiency
43.0%
45.6%
44.6%
46.8%
47.9%
Heat Rate (BTUs/kWh)
7,937
7,485
7,652
7,293
7,125
Exhaust Gas Flow (lbs/hr)
28,200
72,000
      
Exhaust Gas Temperature
671F
784F
      
Recoverable Exhaust (MMBTUs/hr)
3.06
10.42
      
Recoverable Engine Heat
(MMBTUs/hr)
3.64
8.53
      
NOTE: Data in Table is approximate; see manf info for details; this is only a partial list of available engines
 
Gas Engine Lines

Wärtsilä offers three different technologies and a wide range of products for gas applications.

The lean-burn gas engines (SG) feature port admission of gas, prechamber with controlled gas flow as well as individual cylinder control of gas charge and ignition timing. This choice of concept along with extensive research in combustion and combustion control has made it possible to elevate the efficiency from 40% to more than 45% in the bigger engine models. The combination of high efficiency and low emissions is probably unequalled in the market. Lean-burn gas engine models are the Wärtsilä 34SG, Wärtsilä 28SG and Wärtsilä 220SG.

The Wärtsilä dual-fuel engines are unique because they have two different injection systems. A micro pilot injection system injects a very small amount of liquid fuel when the engine is operating in gas mode. The micro pilot system is of the common rail type, which allows for very small injection amounts. This makes it possible to meet very stringent emission regulations, which would be impossible if a normal injection system were used. A conventional injection system is used when the engine is run on liquid fuel such as heavy fuel oil or of course diesel oil if that is the fuel choice. Fuel flexibility and high efficiency are the main advantages of the dual-fuel technology. Two engine models are offered at the moment, the Wärtsilä 32DF and Wärtsilä 50DF. The latter has shown an efficiency of over 48%, which is probably a record at this time.

Wärtsilä gas diesels were the first gas engines to be offered by the company. The first engines have now been in operation for almost 70,000 h. The concept was initially developed for the offshore market, where it has been successfully applied in a large number of floating production units. However, these engines have also been used in numerous power plants because of their fuel flexibility. In the gas diesel the gas is injected according to a diesel process at high pressure. A small amount of liquid fuel is pilot injected when the engine is operating in gas mode. A gas diesel can operate on gas with pilot injection and also on liquid fuels such as diesel oil, heavy fuel oil or even crude oil. In gas mode the gas diesel is more tolerant in terms of methane number than other gas engine concepts. Wärtsilä's gas-diesel engines are the Wärtsilä 32GD and Wärtsilä 46GD.

Emissions

Sample data for the 12V220HE

NOx = 92 ppmv
CO = 297 ppmv
VOC = 41 ppmv

Sample data for the 12V220LN

NOx = 46 ppmv
CO = 445 ppmv
VOC = 80 ppmv

 

PDF Literature

 

 

More Information

Wärtsilä Corporation
John Stenbergin ranta 2
P.O. Box 196
FIN-00531 Helsinki
Finland
Tel. +358 10 709 0000
Fax +358 10 709 5700

Go to the Wartsila web site at www.wartsila.com

 

Source: Warsila web site 7/02 and Wartsila literature