solid model of turbine generator BoP module

Environmental control
Power plant & boiler systems
Chemical process sidestreams
Electromechanical services skids


The modular Balance of Plant concept emerged in the marine industries during the early 1960s, with companies such as Rolls-Royce, Serck Heat Transfer and Coventry Radiator pioneering drop-in electromechanical services packages. Marinized BoP skid mount generating units - along with fuel oil conditioning, lub oil cooling and filtration BoP sets - could be installed during fit-out, and exchanged from the dockwall on a single tide. This anticipated the automated engine room, and present day ship management practices. More recently, similar packaging concepts are being used to provide central services for site-based environmental control applications.


Dove Thermal has been designing and building Balance of Plant modules for over thirty years. The advantages of bringing together all services necessary for a core application are of particular value in the pre-engineering of complex systems, when site access is in some way restricted, or when installations are to be made at remote worksites. We hold the DTI's award for Excellence in Design Engineering and Project Management and were engineering design consultants to the MAS and DAS for their duration. Production plant, process acceleration & product design are core activities.


Believed to have been applied initially to power generation and boiler plant, the concept extends to modularized test plant ancillaries, chemical process sidestreams and marine propulsion equipment. From a contractual viewpoint, a BoP skid mount service module places responsibility for the supply and commissioning of bought-in equipment with a single source, whilst in terms of project management, the component count of deliverables is much-reduced. Having regard to integrity of supply, the transport, storage and security of a single item is more readily arranged. As given above, they are widely employed in managing environmental control systems and related applications.

Power Generation

The isometric shows one of the Balance of Plant modules that we designed for a packaged turbine generator. This BoP skid mount unit brought together pumpsets and heat exchangers, oil & water tanks, and environmental control equipment, with local panels, variable speed drives and prefabricated wiring looms. We have designed and built similar equipment to package various types of electromechanical services and chemical process sidestreams.


Dove Thermal Engineering Limited, Uttoxeter, ST14 8QX

Telephone: 01889 569933