Combined-Heat-and-Power (1).pdf

8/9/2019 Combined-Heat-and-Power (1).pdf

1/12

COMBINED COOLING, HEATING AND POWER


2/12

2


3/12

WRTSIL CHP/CCHP CONCEPT + Extremely efficient utilisation of primary fuels + Distributed energy production enables individual CHP/CCHP solutions + Optimised plant size with step-by-step investment thanks to multi-unit design + Maximised plant availability in all operating situations due to engine wise heat

recovery systems + Flexible operation for changes in power, heat and chilling demands + Electrical output and efficiency are unaffected by the rate of heat production + Lower power transmission costs and shorter piping routes

+ On-site maintenance without production downtime + Flexibility allows Transmission and Distribution System Operators (TSO, DSO)

to host more wind and solar power.

= Low capital and operational costs per output unitHIGH PROFITABILITY!

240340

450600600

750800

400260

Coalfired

steam boiler

Gasturbine

fueloilsinglecycle

Gasturbine

naturalgassinglecycle

Dieselengine

fueloilsinglecycle

Gasengine

naturalgassinglecycle

Gasengine

naturalgasCHP(steam)

Gasengine

naturalgasCHP(hotwater)

Coalfired

chillingplant

Dieselengine

fueloilDCAP

CO emissions in g/kWh2

Typical specific CO emissions by different power plant types2

Electricity production only

Electricity and heat production

Electricity and chilling production

COMBINED BENEFITS OFDISTRIBUTED COGENERATIONWrtsils ongoing development of distributed power plant solutions is based on demandsfor alternative energy sources, the need to shorten transmission distances, and increasingstipulations for fuel efficiency. With deregulation and liberalisation of the energy markets onthe increase everywhere, the trend is towards decentralised systems. Power, heat and chillinggenerated closer to consumers shortens transmission routes considerably.

Wrtsils Combined Heat & Power (CHP) and Combined Cooling, Heating & Power(CCHP) systems are supplied to utilities, independent power producers (IPP), industries andmunicipalities around the globe.The combination of high efficiency and low emission in powerplants built by Wrtsil is unequalled on the market. Wrtsil plants comply with nationaland local environmental requirements and with World Bank guidelines for power plants. Theinternal combustion technology with its very fast starting and stopping capabilities is also aexible and good complement to power production with renewables, wind and solar energy.

Wrtsil CHP plants run on various grades of natural gas and liquid fuels, while stillmaintaining low emissions and high efficiency. The plants include thermal heat recovery for

hot water, steam, direct-re, or chilled water thereby increasing the already high efficiencyof up to 49% in terms of net electricity, to a total plant efficiency of 90% or more.

Typical plant sizes are 4600 MWe and up to 175 MWch/50,000 TR chilling in single ormulti-engine congurations.

3


4/12

+15,500

22,500

CombinedSCR/OXI-CAT

CHP-module Engine-generator set

Radiator

(option)

Exhaust gas silencer

Exhaust gas boiler

PLANT CONCEPTWrtsil CHP/CCHP plants powered bycombustion engines offer exibility anduncompromising performance wherever power,heat and/or chilling are required.

Typical heat recovery systems, between the

prime mover and the customers equipment, areof hang-on type and ensure both optimisedheat production and effective engine coolingand operation. Wrtsils heat recovery designtakes into account all the customers seasonal,monthly, weekly and daily variations in runningand operational heat/cooling productionconditions. Heat production does not affect theelectrical output or the electrical effi ciency of theprime mover.

The modular design of Wrtsil CHP/CCHP plantsenables rapid delivery anywhere in the world.Prefabricated, functionally pre-tested modulesguarantee consistent quality and performanceand make on-site installation a matter ofassembling and connecting the modules.

Wrtsil has the resources and capabilitiesto carry out deliveries ranging from the supply of

equipment and engineering to complete turnkeyprojects including engineering, procurementand construction. A globally experienced projectorganisation guarantees successfully executeddeliveries around the world.

One of the benets of Wrtsils modularplant concept is the unique exibility of operationenabled by the cascading multi-engine structureof the plants. Multi-unit installations provide highplant effi ciency at any load: extra generatingsets can be turned off, while the plant continuesto run at peak effi ciency with as many units asrequired.

As demands change, the design of the plantsmakes it possible to increase the plant size instages by adding new engines. This also allowsfor a smaller initial investment with the option toexpand later as required.

4


5/12

TOWN CONCEPT EXAMPLEWhen the plant is situated in the middle of a city or an

industrial plant site, the layout is more compact and theprotective shielding is stronger. The two oor plant lay-outallows a small and compact footprint. The exterior of theplant and possible architectural design of the power househas also to be suited to its surroundings. The emissionlevels have to be kept very low with effective emissionreduction systems and heavy-duty silencers have to beinstalled to eliminate any noice problems.

FIELD CONCEPT EXAMPLEWhere the building site is ample and not situated in themidst of a densely populated area, the single oor plantlayout with an overall lower plant prole is used. The mainheat recovery system is situated outside the main enginehall, either under a separate roof or as weatherproofequipment.

+10,950

21,250

HP-module Engine-generator set

Wrtsil 20V34SG

Engine auxiliary module (EAM)

CHP module

Pre-engineered and pretested modules minimiseconstruction time and maximise reliabi lity.

5


6/12

90%

85%

80%

75%

80C 90C 100C 110C 120C 130C75C

70C

65C

60C

55C

50C

45C

Recoveredheat

Totalefficiency

eturn temperature

upp y temperature

10,100 kW

9000 kW

7900 kW

6800 kW

76%78%

78%80%

80%82%

82%84%

84%86%

86%88%

88%90%

90%92%

PLANT TOTAL EFFICIENCY DEPENDING ON HOT WATER TEMPERATURES

Power (net) 44%Electricity 46%

Fuel consumption 100%

From the engines

Heat recoveryfrom the engine

Losses 35.5%

Steam generation 18.5% Total efficiency62.5%

an aux ar es

Documents

Combined-Heat-and-Power (1).pdf