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Combined heat and power plants

Thinks, instead of measuring. The emission analyzer testo 350.

Combined heat and power plants (CHP) are used for the central production of and supply with power and heat. These plants are used in agriculture, in communes, in the management of residential buildings by medium-sized commercial and industrial companies, as well as by municipal utility companies and large energy suppliers.

The conditions for operating a CHP system are better now than ever before. For one thing, low oil and gas prices as well as state subsidies make the investment worthwhile. Apart from this, the increased electricity requirement of a growing world economy must be covered.

In order for a cogeneration plant to be operated economically, certain basic standards must be ensured by the targeted application of suitable measurement technology.

  • Monitoring emission limit values

  • Checking and inspecting engine efficiency

  • Correctly configuring the relations between ignition timing, excess air etc. of the engine

  • Testing of exhaust gas treatment systems

Good for the climate. And for the balance sheet.

Reducing emissions and energy costs

Emission measurement on combined heat and power systems

Combined heat and power plants are usually modified and enlarged engines from automotive engineering which draw in a combustion gas (e.g. landfill gas, biogas or liquid gas), mix it with air, compress it and burn it. During this process, air surplus, fuel pressure, engine setting and ambient temperature or humidity can have a significant effect on the emissions. These effects must be taken into account when optimising or adjusting the engine, in order to achieve a maximum efficiency of the process as well as a minimum emission level.

If the adjustment is carried out using an imprecise measuring instrument, it can have negative consequences:

  • Misfiring

  • Mechanical knocking

  • Increased temperature in the engine components and operating materials

  • Increased wear

  • Higher maintenance and repair costs


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Application information and reference reports

Application sketch


Application description of combined heat and power plant

Cummins is one of the world’s leading manufacturers of diesel and gas engines. The company relies on the testo 340 when commissioning them. Read here what the experts love.


Read report

Reference report testo 350

How is the efficient operation of a CHP plant guaranteed with the emission analyser testo 350? Find out more from the practical example of 2G Energy AG.

Application sketch

Read report

Reference report testo 340

Cummins is one of the world’s leading manufacturers of diesel and gas engines. The company relies on the testo 340 when commissioning them. Read here what the experts love.

Versatile measurement technology for combined heat and power plants


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Preventive maintenance

  • Safe testing of electrical and mechanical components during continuing operation

  • Fewer downtimes, longer product life and more efficient energy use.


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Measurement of temperature, humidity and flow velocity

  • Optimisation of the heat exchanger

  • Extension of the life of the turbocharger

Clamp meters

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Measuring electrical parameters

  • Monitoring of electrical components in order to minimise breakdowns



Brochure: Measurement technology for CHP

  • Condensed selection of technology for CHP pros

  • With new kits for emission analysis