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What can I choose in the calculator?

The calculator lets you choose the share of total centralised heat demand covered by Centralised Boilers in Switzerland in the selected year (2035 or 2050).

Centralised Boilers



  • Impact
  • Global markets
  • Definition
  • Constraints
  • Assumptions
  • References

IMPACT – What are the impacts of Centralised Boilers?

In Switzerland, increasing the share of Centralised Boilers will have the following impacts:

Energy system

image Unlikely to have significant impact on final energy demand.

image May decrease total electricity consumption slightly.

image Likely to increase total fossil fuel consumption particularly if natural gas prices remain low.

image Could increase the share of renewable energy sources in the energy mix if biomass or waste-fired boilers are favoured.

image Likely to reduce energy independence by promoting fossil imports.

Environment & Climate

image Could reduce global CO2 emissions if biomass- and waste- fired boilers are favoured.

image Could have a certain impact on global CO2 emissions if natural gas and heating oil fired boilers are favoured.

image Could decrease deposited waste if waste fired boilers are favoured.

Society & Economy

image Likely to increase the cost of the energy transition as it requires deployment of district heating networks and CHP technologies as well as, in principle building efficiency improvements.

GLOBAL MARKET – What is the global market for Centralised Boilers?

There are currently more than 5,000 district heating systems in Europe supplying more than 10% of European heating demand and generating an annual turnover of €25-30 billion. About 80% of the heat in these district heating networks comes from various forms of cogeneration. The capacity of installed centralised boilers is likely to be proportional to the cogeneration capacity as most district heating systems will have back-up boilers. [1]


DEFINITION - What is a Centralised Boiler?

A boiler generates hot water or steam by burning fuel. For large, centralised boilers, a wide range of fuels, such as natural gas, heating oil, wood, biomass, and municipal solid waste can be used, although natural gas, heating oil and wood are the most common fuels.

Centralised boilers are usually part of a district heating system. The primary interest in deploying district heating is to use CHP plants to generate electricity and heat to improve the overall energy efficiency. Such systems would typically also include back-up boilers that ensure that the district heat demand can always be met even if the CHP plant is not operated.

CONSTRAINTS - What are the key barriers facing Centralised Boilers deployment?

• Requires district heating infrastructure (network) which is capital intensive to deploy, particularly as a retrofit.

• Boilers that are designed for burning biomass or municipal waste tend to be more expensive and complex than those that operate on natural gas or heating oil.

ASSUMPTIONS – What are the assumptions considered in the calculator?

The model contain three types of centralized boilers: gas boiler, oil boiler and solid fuel boiler.

Next tables contain the assumptions that have been introduced in the Centralized boiler model of the calculator.

Efficiency [%]
2035 2050
Gas 92 95
Oil 87 90
Wood 92 95
Coal 82 85
Waste 82 85
CO2-eq. emissions [kgCO2-eq./MJfuel] Gas0.0700
Deposited waste [UBP/MJfuel] Gas0.706
Specific investment [CHF2010/kWth] Gas124
Solid fuel (wood, coal and waste)574


[1] DHC+ 2012, District Heating and Cooling plus, The Vision for District Heating and Cooling

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c_boiler_more.txt · Last modified: 2019/10/22 09:17 (external edit)