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CHP Installation

CHP Installation or Combined heat and power (CHP) units are becoming increasingly popular for their energy-efficient and cost-effective benefits. A CHP unit can provide both heat and electricity for businesses and homes, reducing energy bills and carbon emissions. In this article, we will explore the installation process for a typical CHP unit.

Site Survey

Before installation, a site survey is carried out to assess the suitability of the location for a CHP unit. This involves determining the current energy usage, analyzing the site’s electrical and gas infrastructure, and assessing the available space for the installation. The results of the site survey are used to determine the most appropriate size and type of CHP system for the property.

Design and Engineering

Once the site survey is complete, the CHP unit is designed and engineered to fit the specific needs of the property. This involves designing the system to match the electrical and thermal profile of the property, identifying the appropriate equipment and controls needed to maximize energy efficiency and minimize emissions. The design and engineering phase is critical to ensure the CHP unit will function effectively and deliver the promised energy savings.


Once the site assessment is complete, the next step is to design the CHP system. The design process involves selecting the appropriate equipment, such as the generator, engine, and heat recovery system, and designing the system to meet the specific energy demands of the site. The design phase also involves selecting the most suitable fuel source and determining the optimal system configuration for the site.

Several factors must be considered during the design phase, including the site’s thermal load, the electrical load, and the balance of plant requirements. The balance of plant requirements includes cooling systems, fuel storage, and the electrical system. Electrical design includes selecting the appropriate generator size, determining the interconnection requirements, and selecting the switchgear, transformers, and other equipment needed to connect the system to the site’s electrical infrastructure. Additionally, it is important to consider future expansion opportunities during the design phase, so the CHP system can be designed with additional capacity in mind.

Equipment Selection

The selection of equipment is an important step in the CHP installation process. The equipment selected will depend on several factors, including the site’s thermal and electrical loads, fuel availability, and budget. The primary components of a CHP system include the generator, engine, and heat recovery system.


The generator is responsible for converting the mechanical energy produced by the engine into electrical energy. When selecting a generator, factors to consider include the electrical load of the site, the interconnection requirements, and the efficiency of the generator. The efficiency of the generator is critical as it will determine the amount of electrical energy that can be generated from a given amount of fuel.


The engine is the heart of the CHP system and is responsible for producing mechanical energy from the combustion of fuel. When selecting an engine, factors to consider include the type of fuel, the engine efficiency, and the emissions produced by the engine. Gas engines are the most commonly used engine type in CHP systems, as they offer high efficiency and low emissions.

Heat Recovery System

The heat recovery system is responsible for capturing the heat produced by the engine and using it to produce hot water, steam, or chilled water. The type of heat recovery system selected will depend on the site’s thermal load and the desired temperature requirements. For example, an absorption chiller can be used to produce chilled water for air conditioning, while a steam turbine can be used to produce steam for industrial processes.


The installation process for a typical CHP unit can take up to several days, depending on the complexity of the project. The installation team first prepares the site and ensures that all necessary permits have been obtained. Then, they install the necessary piping, electrical connections, and control systems to connect the CHP unit to the gas and electricity networks in the building. Finally, the CHP unit is installed, tested, and commissioned to ensure that it is working correctly.


Once the CHP unit has been installed and tested, it undergoes commissioning. Commissioning involves carrying out a series of tests to ensure that the CHP system is operating efficiently and has been correctly integrated with the building’s heating and electrical systems. During commissioning, the CHP system’s performance is monitored to ensure that it is meeting the specified criteria for energy efficiency, reliability, and environmental impact.

Training and Support

After the CHP unit is successfully commissioned, the installation team will provide training on the operation, maintenance, and troubleshooting of the system. This training ensures that the property owner or facility managers know how to operate the system to maximize its efficiency and minimize downtime.

Ongoing Maintenance and Support

Once the CHP unit is up and running, it will require regular maintenance and support to ensure that it remains in excellent condition. It is essential to adhere to the manufacturer’s recommended service schedule, which typically includes annual or biannual maintenance visits. The maintenance team will inspect the CHP unit, replace any worn parts, and recalibrate the system where necessary to ensure that it continues to operate at maximum efficiency.

In conclusion, the installation and commissioning of a CHP unit require a thorough understanding of the building’s infrastructure, good design and engineering practices, and excellent installation and support teams. A well-designed and installed CHP system can provide substantial energy savings, reduced carbon emissions and ensure a reliable source of electrical and thermal energy for years to come.