EFFECTIVENESS OF HYBRYD POWER PLANT WITH ORC SUPPLIED BY STEAM PRODUCED IN A LOW-TEMPERATURE BIOMASS BOILER

In the paper presented has been the assessment of the effectiveness of operation of a power plant with organic fluid as a working fluid where turbine is fed with saturated steam produced in a low-temperature boiler fired with biomass. A specified evaporation temperature of a substance, which is a working fluid in the cycle, corresponds to evaporation temperature in the boiler. Calculations have been completed for four evaporation temperatures of working fluid T1n (103, 108, 113, 118 degrees C) for selected organic substances. Discussed power plant is a hybrid plant where the heating process of working fluid is supported by the low temperature source of waste heat. Obtained results of calculations have been compared with the results of calculations of a power plant, where saturated steam was supplied directly from the boiler, with a possibility of condensate heating by a relevant low temperature heat source. Assessment of particular cases of the power plant has been conducted in comparative conditions of heat supply from the boiler with nominal capacity of =2000kW, whereas the condensation process in respective power plants is realised independently of applied circulation fluid and is executed at a pressure corresponding to temperature of 30 degrees C.