VPE and the HRSGs

Heat Recovery Steam Generator (HRSGs) is an equipment to recover the waste heat released from electricity generating has turbine in power plant or from process plant equipment to produce steam to drive steam turbine or for plant utility usate.

 HRSG is considered and "Unfired" boiler due to no combustion take place inside. However, som large HRSG may require a bank of auxiliary burners to increase inlet temperature and to maintain uniform temperature. There're 2 modes of HRSG; congeneration mode and combined cycle mode.

 VPE'S frist experience in fabrication of HRSG's component was in early 1990s when HRSG technology emerged as a complimentary to the conventional utility boiler for power plant. Today HRSG has become popular for electricity generating source as a replacement of aged utility boiler due to abundance if natural gas, faster response to electricity peak demand, and more enviromental-friendly.
 Until today, VPE has fabricated more than 200 units of the non-pressure components of HRSG such as main HRSG structure and casing (with insulation and stainless steel liner), access steel (roof platform and stair tower), and steam piping. The other HRSG 's pressure components that VPE has limited involvement are harp bundles and steam drum, and it is best to leave to other specialized vendors to manufacture them.

 The demand of HRSG is cyclical depending on the economic state of the user's country. With the closing of nuclear power plants in several countries due to safety concern, the HRSG demand is on the rising once agian. HRSG is the second most important product of our company.