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Expander-CHP

CNG Services is pioneering the development of expander-chp projects for gas pressure reduction. High gas and electricity prices mean that 'best available technique' for gas pressure reduction is no longer a simple J-T valve. Instead, a gas expander coupled with a gas fired CHP plant is the most efficient solution.

Our services in this area are as follows:

Pre-feasibility study

  • Modelling of gas flows to calculate electricity output
  • Sizing of CHP plant
  • Capex estimates
  • Estimated CO2 savings
  • Financial analysis

Feasibility study

  • Electricity connection
  • Plant layout
  • Land issues

Conceptual Design study

  • Confirm all plant sizing and layout
  • Produce P&iDs
  • Planning permission
  • Electricity export parameters
  • Tendering for major plant items (expander and CHP)
  • Financial analysis and sensitivities
  • CO2 savings
  • Production of Project Approval Paper

Detailed design and project management

  • Detailed design
  • Tender for installation contractor
  • Project management

Project returns are attractive and there are significant CO2 savings from high efficiency electricity generation. A project currently being built will have an efficiency of 80% (ie 100 MW of gas burnt in a gas engines will create 80 MW of electricity, almost certainly the most efficient gas fired power station in the UK)