Effect of Brine Mass Rate on Pressure Drop and Dirt Factors in the Design of the Evaporator on Kalina Cycle
Sri Wuryanti, Maridjo, and Ahmad Mudawari
Politeknik Negeri Bandung
Abstract
Geothermal is one of the most significant natural resource potentials in Indonesia. One power plant that utilizes geothermal steam as its energy source is PLTP. Geothermal steam that has passed through the geothermal power plant separator to move the turbine while the residual waste (brine) with a high enough temperature has the potential to be a source of heating to produce electrical energy in the Kalina cycle generator. The Kalina Cycle is one of the brine utilization cycles that uses a mixture of two working fluids in the form of an ammonia-water mixture. Using brine, before entering the turbine, it must first become airtight in the evaporator. The design of the evaporator must be such that it meets the operative requirements namely the pressure drop value and the dirt factor. Different variations of brine rate will produce different pressure drops and soil factors. Brine rate variations are 80 tons/hour, 120 tons/hour, 160 tons/hour, 200 tons/hour and 240 tons/hour show the lowest pressure drop of 0.086 bar and the most massive 0.63 bar, and the smallest dirt factor is 1.47 × 10 -6 ((hr)(m^2)^oC)/Joule moreover, the largest is 2.69 × 10-6 ((hr)(m^(2)^o C)/Joule.
Keywords: brine, generator, electrical, evaporator, steam, turbin.
Topic: Chemical Engineering