CHP & Gas Engines

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CHP & Gas Engines

A combined heat and power (CHP) plant is a cost-effective way of producing energy, using either a biogas or natural gas from the grid. Many businesses have now installed these units and are enjoying the self-generated heat and electricity they provide. If you are one of these businesses or are considering purchasing a CHP, you may want to consider enhancing its performance, using an ORC.

How is this done? Heat from either or both the exhaust and cooling jacket of the CHP can be captured and used to power an ORC, using no additional fuel. Therefore, WHTE could help you increase the efficiency and improve the speed of payback by increasing both heat and electrical production in 1 of 2 ways:

Natural Gas
When a CHP installation is assessed for efficiency (CHPQA), the natural gas used/heat and power produced ratio is measured. This calculation creates a Quality Index or QI. If this reaches 100, the Climate Change Levy element of the gas invoice is eliminated. The heat and electricity produced by the addition of an ORC requires no additional gas, thereby increasing the efficiency ratio. The client is then exempt from the CCL, reducing his gas costs significantly.

Currently, the government is subsidising the use of biogas in a CHP using the Renewable Heat Incentive (RHI) program. Adding an ORC to the installation increases the electrical production, by taking heat from either or both the exhaust and cooling jacket of the CHP. It also means that heat from the ORC can be used to claim RHI, as its heat source is biogas. Therefore, increased efficiency and reduced payback period can be achieved, without increased fuel costs.

A cost-effective way of future-proofing escalating energy costs and enabling a level of independence from the grid provides a strong business case, worth exploring. It becomes a more compelling mission when it directly affects the bottom-line. A CHP secures a level of independence from the national grid and offers a level of protection from escalating electricity prices.

Adding an ORC, augments the efficiency and ensures that the maximum electricity is generated from heat that would otherwise be wasted. This adds exceptional financial benefits for both natural and biogas CHP’s (see above). To facilitate these benefits, through its partnership with various financial institutions, WHTE can offer a variety of financial arrangements, including some where no capital outlay is required by the client.

If you would like to explore the possibility of maximising the output from your CHP, with no additional fuel costs, contact WHTE now for a no-obligation discussion.

Use All The Heat
Through the use of a simple exhaust gas heat exchanger, WHTE can harness unused heat from your CHP and generate more electricity. You don’t use any more fuel in the engine, so the efficiency of your plant is increased, making your investment go further.
Wide Range of Installations
Whether you are running a biogas engine at a water treatment plant, a natural gas CHP unit in an office complex, handling waste at an AD plant, or anywhere else, WHTE can work with your gas engine, or CHP, regardless of manufacturer.
Generating Electricity Onsite
Our ORC technology allows waste heat captured from either exhaust, or water jacket of your engine, to generate additional heat and electricity on site. Any electricity produced above the site requirements is sold back to the national grid to provide a revenue stream for the customer.

Many clients are seeking alternative means

With electricity costs only heading in one direction, many clients are seeking alternative means to source their power requirements. Combined Heat & Power (CHP) is increasingly seen as the best fit, especially for those not wanting to be subject to the vagaries of weather dependent technologies. Whilst most CHP users can consume all of the electricity produced, it is more challenging to find a satisfactory use for the heat. This is where ORC comes to the fore. The ORC can take the unused CHP heat and produce additional electricity. The dissipated heat from the ORC is often easier to find a use for, as it is lower temperature.

In natural gas CHP this is especially useful, as the electricity and heat from the ORC contribute towards the CHPQA Quality Index “score”. This makes it much more likely that you can achieve the “100” score needed for the client to benefit from reduced climate change levy on their gas bill.

In the case of Biogas CHP engines, the addition of WHTE ORC technology can be equally beneficial. The same challenge is often present, in terms of clients wanting more electricity, but struggling to find a home for the heat. In this case, as Biogas is a renewable fuel source, dissipated heat from the ORC circuit can qualify for RHI, provided the heat is put to an eligible use.


Did you know you can power your facility with discarded waste heat?