Load flexible heat recovery boiler for engine plants

07. December 2015

Increasing deployment of intermittent wind and photovoltaic generation requires flexible back-up systems and reciprocating engines seem to be one technology of choice. The global deployment of engine plants is rising with plant capacities increasing to well above 200MWe. ERK is actively involved in this trend with high efficiency and load flexible HRSG’s. In the last 18 months our licensees supplied more than 15 such units and we are designing HRSG’s using the exhaust gas from a single and multiple engines.

Rapid load change capabilities are a key benefit of engine plants and ERK’s HRSG range is designed to follow engine loads changes very quickly. ERK has some boilers with more than 20% load change per minute in operation. Depending on the site footprint we can design horizontal and vertical HRSG for superheated steam, saturated steam, hot water, thermal oil or other working fluids.

In addition to the common one-on-one design (one HRSG for each engine) ERK has designs for two-on-one and three-on-one configurations. The benefit of coupling multiple engines to one HRSG are lower capital cost, a decrease in plant complexity and reduced maintenance cost. The experience to manage the flow distribution, back pressure and part-load operation of such HRSG’s is available at ERK.

Over the last months our licensee Selnikel was very successful supplying more than 10 HRSG's to engine projects. We would like to congratulate them for their success and are looking forward to further projects with Selnikel and other licensees worldwide.

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