Waste Heat to Electricity

Convert Waste Heat to Electricity and become more energy efficient

What is waste heat to electricity?

Electrical energy consumption is ever higher in the modern world compared to a decade before—the planet braces up to 42% of increased CO2 emission, which comes from power generation. Power plants have to work longer than before to meet the ever increasing electricity demand by the typical consumer. The CO2 ending up in the air may be from coal, gas, or fuel. There is a need to enhance efficiency in power generation processes if we want to achieve a greener planet and delay climate change. Moreover, modern consumers want to deal with companies that incorporate green solutions in managing their energy consumption and use heat waste.

We help companies increase efficiency in their power production by introducing the third power generation method. We can tap waste heat emanating from day-to-day industrial processes that involve processing raw materials into finished products. This heat waste can be from power generation plants, chemical plants, exhaust from ship engines, combined heat, and power plants (CHP), and refineries. Waste heat to electricity conversion saves the overall costs of operation and helps your business build strong public relations.

Waste heat to electricity generator in a factory

How To Convert Waste Heat to Electricity

We use modern technology-driven equipment that recovers waste heat and generates electricity through the Organic Rankine Cycle (ORC) turbine technologies principle. That means the source of the generated electricity is heat waste and not oil or other fossil soils. Thus, the process doesn’t cause a change in operating costs in terms of fuel used in production. You’ll still use the same amount of energy as we focus on harnessing all the heat waste released in the process. In the long haul, industries that don’t use this technology miss an opportunity that could transform their operations for the better.

The waste heat energy to electricity technology recycles back the energy into the process that created it, funnels it into another part of the facility, or you sell it. The process involves setting a steam turbine into motion through the pressure of hot gases, which then drives a generator that produces electricity. We might also heat the gas in the evaporator through hot water or another heat source to raise its temperature to about 97 degrees Celsius. We cool the gas in the condenser after leaving the turbine and transfer it to a district heating network or wherever you might need it.

It works like this:

A turbine is set into motion through the pressure from the gases which then drives a generator that produces electricity. The gases are heated in the evaporator through hot water or another heat source that is at least 80 degrees Celsius. After passing the turbine the gases are cooled in the condenser and the residual heat is transferred to a district heating network or wherever such heat is needed.

Fill in the form below

Below there is a form to be filled in order for us to estimate if there is enough waste heat for electricity generation. The waste heat may come from steam, hot water, exhaust gases or a geothermal drilled well.
Step 1

We call you to talk some more

As we receive your form a calculation starts giving a rough first estimation of how much heat ther is and how much of that heat that can be transformed into electricity. We will call you or set up an on line meeting to discuss the posiibilities. .
Step 2

Install the plant

We can ride on a long experience of how to install the machinery in your plant. Some times a lot of piping has to be done to the primary heat exchangers and we can help in the construction project.
Step 3


In this example the installations is done in a Combinet Heat and Power generation plant (CHP). 

Step 1

Two pipes are installed from the boiler circuit

Step 2

Two pipes are also installed from the district heating network’s return

Step 3

Electric cables are installed from a power station

Step 4

You now have a small CHP plant!

This orc waste heat to electricity application system has a lifetime of 25 years and usually the return on investment comes within a 5-7 year period. When installed there is an energy service available with a need for only one maintenance visit per year.

For those of you interested in the theories behind ORC thre is a lecture from University of Calgary, Mechanical Eningeering in Thermodynamics. They cover boiler and does calculations on higher temperature ranges that is the normal situation. 

Our solution works with temperatures from 80 to 150 degrees Celsius and the calculation method differs slightly. 


Most frequent questions and answers

As long as there is enough heat energy available above 80 degrees Celsius it is possible go generate electricity. The heat source needs to contain more than 2 MW of energy. If there is a diesel power generation plant delivering 3 MW the need is fulfilled. The heat in the exhaust gases are catched by a heat exchanger and brought to the equipment. In Guinea-Bissau 100% of the electricity for the whole nation is generated in such plants, in Cuba at least 10%. 

There is a possibility to install the equipment on container or RoRo vessels and crusing ships and ferries. The efficiency of consumed diesel or LNG will increase with about 7%.

The equipment is modularized in construction with target electricity power generated from 50kW to 2MW. Several units can be mounted in parallell to meet the demands.

The uptime for a system is about 99,5%.