Abstract:
Wood-fired combined heat and power (CHP) plants are a
proven technology for producing domestic, carbon-neutral heat
and power in Nordic countries. Such plants are often of backpressure
configuration, the district heat condenser replacing the
vacuum condenser of a condensing power plant. The condenser
is usually a shell-and-tube heat exchanger with district heating
water on the tube side. In this paper, a new approach is presented
to optimize the condenser design considering not only the
design-point performance, but also variations in the operating
conditions. A power plant model is used to determine the plant
performance (net power output and boiler fuel consumption) as
a function of the main performance parameters of the condenser
at each point. Cuckoo search algorithm is used for the
optimization. The results show that although electricity price
variation has a significant impact on plant net cash flow rate, the
effects of electricity price and heat exchanger specific cost on
condenser design are low.
Description:
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.
