Sustainable palm oil refinery cools with ammonia

By Clémence Girard-Reydet, Dec 12, 2013, 14:57 2 minute reading

Star Refrigeration has delivered a R717 refrigeration system to New Britain Oils Ltd. in Liverpool. The new system is designed for high-energy efficiency, low carbon footprint, longevity and reliability.

Star Refrigeration successfully completed a Total Solutions project for sustainable palm oil producer New Britain Oils Ltd (NBOL). The Liverpool based company is part of NBOL, the largest palm oil producer in Papua New Guinea and The Solomon Islands. The ammonia-based palm oil cooling system was designed, project managed, installed and commissioned by Star to serve the clients new scraped surface heat exchangers.

Sustainable 600kW ammonia cooling system

The system was designed for high energy efficiency, low carbon footprint, longevity and reliability. Key design requirements involved minimising both noise and vibration. The major equipment consisted of:

  • Two 300kW inverter driven reciprocating compressors
  • One combined surge drum/high pressure receiver package unit
  • One evaporative condenser
  • Star’s refrigeration management system

Star reciprocating inverter drive technology for high energy efficiency

High efficiency was accomplished by using Star’s reciprocating inverter drive technology in conjunction with high efficiency drive motors. The compressor control philosophy further enhanced system energy efficiency characteristics. Heat rejection was achieved using an evaporative condenser complete with Star’s Aether condenser fan control system which reduces the annual operating costs by matching fan speed to ambient conditions and cooling load.

Compressor control system ensures continuous production

Rapid variation in the production process load meant that the system needed to respond quickly to an instantaneous reduced or increased cooling requirement whilst also maintaining stable temperatures. Star’s compressor control system varies compressor speed to match cooling capacity to the production heat loads. This ensures optimum system efficiency, high reliability and most importantly, continuous production. In addition, Star achieved minimal noise and vibration through careful design of the compressor plinth. Pipework was designed and installed to prevent the transmission of the vibration through the brackets into the building structure.

Scraped surface heat exchangers for chilled food products

Star’s in-depth knowledge of chilling food products with scraped surface heat exchangers was significant. A key feature of the installation is Star’s combined surge drum receiver, which transfers any liquid that returns from the process back to the high-pressure receiver within minutes. During commissioning this proved to be of paramount importance in maintaining product trials.

About Star Refrigeration

Founded in 1970, Star Refrigeration has become one of the leading companies in cooling and heating system innovation. It has expanded from an industrial refrigeration company to a multi-faceted engineering group. Today Star Refrigeration is a total solutions provider, active from design through to commissioning and maintenance of cooling and heating systems with a specific competence in the minimisation of refrigerant charge and leak-tightness.

It has over 350 employees working from nine branches throughout the UK and a network of overseas partners enabling the delivery of Star solutions around the world.


By Clémence Girard-Reydet

Dec 12, 2013, 14:57

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