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Gas-engine Driven Chillers & Cooling Systems


EuroSite Power can offer a number of gas-engine driven chillers across a range of outputs from 90kW to 1,400kW.

Unlike conventional chillers that use an electric motor to power a compressor, a gas-engine driven chiller uses an internal combustion engine to power the compressor – simple.

The change in how the chiller is powered creates not only high efficiency but also the opportunity to recover the heat from the engine itself. As such a gas-engine driven chiller can provide both chilled water and hot water simultaneously for even greater energy efficiency. In effect this becomes a form of cogeneration we call Combined Heat and Cooling (CHC).

Those familiar with Combined Heat and Power will know that an absorption chiller can often be combined with the CHP to provide trigeneration (electricity, heat and chilled water).  Reliance on an absorption chiller can mean the overall system efficiency is lower when the waste heat is being used to produce chilled water. As such trigeneration systems are far less common that simple cogeneration.

Although an electric compressor driven chiller is a very efficient system for cooling a building, using a gas-engine to drive the compressor makes it even more efficient – 2.5 times more efficient than the most efficient absorption chiller. As a result, a gas-engine driven chiller cooling system provides greater comfort and savings.



Benefits of Engine Driven Chillers

There are several benefits to implementing gas-engine driven chillers compared to absorption chillers or conventional electric chillers. These include overall efficiency, system footprint and the use of natural gas itself.

Gas-engine driven chillers are more efficient. A 700kW system has a COP of 2.6, which is significantly more efficient than most absorption and electric chillers on the market today. In addition, given that most chillers installed in our buildings today are not modern units, a gas-engine chiller solution from EuroSite Power is likely to be far more efficient that any incumbent system.

Our gas-engine chillers also have another advantage over absorption chillers as they can also be modified to supply lower temperatures for applications such as cold stores, ice for ice-rinks or process applications.

A gas-engine driven chiller system provides superior efficiency due to its heat recovery capability. The heat produced by the engine as it works is captured using heat exchangers not only from the engine’s water cooling circuit but also from the exhaust gases and even the engine oil itself. This heat is then connected to your existing heating system to supply space heating, heat domestic hot water or to provide heat for swimming pools and spas.

Perhaps the biggest advantages for a gas-engine chiller come from the fact it consumes natural gas, a fuel that is both less expensive per kWh of energy consumed and contains less carbon. This means that the chiller is both cleaner and less expensive to operate than the conventional alternatives.  Such solutions also reduce the demand on the national grid, increase overall energy efficiency and can also help protect your buildings from power cuts, particularly where chilled water is used to cool vital services such as server rooms or communications centres.

Another benefit of a gas-engine driven chiller is its compact size. An engine driven chiller is smaller than an absorption system and has the same footprint as an electric chiller. Replacing your existing system won’t require additional space in your plantroom.

Importantly a gas engine chiller can continue to operate during power cuts or through an emergency. Loss of power will not prevent a gas-engine chiller from running. Though you still require some electricity to run pumps and fans, the amount of back-up power required is dramatically less than with other cooling systems.

Chiller System Installation

Chiller system installation costs are not insignificant. Once the system is in place, the building owner is responsible for its operation and maintenance, requiring either internal staff or a third party FM contract. For many businesses finding the cash and the expertise to install and operate a CHP system presents a challenge. In most cases, our On-Site Utility System™ is the best option.

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