(a) Calculate the steam mass flow rate (kg/s) through the boiler. (b) Compute the isentropic efficiency (%) of the adiabatic turbine. (c) Find the entropy generation (kW/K) for the adiabatic turbine. (d) Determine the total entropy generation (kW/K) for the condenser assuming heat transfer occurs to an environment of temperature 5 C.

Read MoreMethane is burned with air in a PA Hilton boiler to produce hot water oof 55oC. The fuel is fed at a rate of 7 kg/hr at 25 C, the air enters the boiler at a rate of 130 kg/hr at 42.5oC, and the water enters the boiler at a flow rate of 1000 kg/hr at 10oC. The composition of the dry flue gas leaving the boiler at 700oC are found to be 0.9% O 2

Read MoreA simple ideal Rankine cycle which uses water as the working fluid operates its condenser at 4 0 ∘ C 40^{circ} mat{C} 4 0 ∘ C and its boiler at 30 0 ∘ C. 300^{circ} mat{C}. 30 0 ∘ C. Calculate the work produced by the turbine, the heat supplied in the boiler, and the thermal efficiency of this cycle when the steam enters the turbine without any superheating.

Read MoreThermodynamics (7th Edition) Edit edition Solutions for Chapter 10 Problem 23P: A simple Rankine cycle uses water as the working fluid. The boiler operates at 6000 kPa and the condenser at 50 kPa. At the entrance to the turbine, the temperature is 450°C. The isentropic efficiency of the turbine is 94 percent, pressure and pump losses are negligible, and the water leaving the …

Read MoreMar 17, 2015 · Step 3: Determine Blowdown Properties and Mass Flow. Using the calculated feedwater mass flow and blowdown rate: Blowdown Mass Flow = Feedwater Mass Flow * Blowdown Rate. [ Blowdown Mass Flow = 7.1 klb/hr = 93.4 klb/hr * 0.076 ] Using the Steam Property Calculator, properties are determined using Steam Pressure and Quality = 0 …

Read Moresubcooled by 6_3cc_ The boiler is sized for a mass flow rate of 20 kg/s_ Determine the rate at which heat is added in the boiler, the power required to operate the pumps, the net power produced by the cycle, and the thermal efficiency. (Answers: 59660 kW, 122 kW, 18050 30.3%)

Read MoreThe heat of combustion is 28 MJ/kg. Assume that all heat is transferred from the fuel to the boiler and that all the work done in spinning the turbine is transformed into electrical energy. a) Suppose the coal is is piled up in a 10 m x 9.0 m room. How tall must the pule be to operate the plant for one day?

Read MoreThe application of the 'from and at' rating graph (Figure 3.5.1) is shown in Example 3.5.1, as well as a demonstration of how the values are determined. Example 3.5.1. A boiler has a 'from and at' rating of 2 000 kg/h and operates at 15 bar g. The feedwater temperature is 68°C. The use of Equation 3.5.1 will determine a factor to

Read MoreMar 17, 2015 · Step 3: Determine Blowdown Properties and Mass Flow. Using the calculated feedwater mass flow and blowdown rate: Blowdown Mass Flow = Feedwater Mass Flow * Blowdown Rate. [ Blowdown Mass Flow = 0.8 klb/hr = 82.4 klb/hr * 0.01 ] Using the Steam Property Calculator, properties are determined using Steam Pressure and Quality = 0 …

Read MoreFor a mass flow rate of 10 kg/s, determine (a) the rate of heat transfer from the boiler to the water. (b) If the energetic efficiency of the boiler is 80% and the heating value of coal is 32.8 MJ/kg, determine the rate of fuel consumption in tons/hr. (c) What-if scenario: What would the rate of heat transfer be if the boiler pressure were 3 MPa

Read More10-55 10-70 A cogeneration plant modified with regeneration is to generate power and process heat. The mass flow rate of steam through the boiler for a net power output of 15 MW is to be determined. Assumptions 1 Steady operating conditions exist.2 Kinetic and potential energy changes are negligible. Analysis From the steam tables (Tables A-4, A-5, and A-6),

Read MoreQuestion: A boiler with a mass of 10 kg uses 51 kW to heat 20 gallons of liquid water initially at 15°C. The average specific heats for the boiler material and the water are 0.48 kJ/kg.K and 4.18 kJ/kg.K, respectively. The average density of the water is 850 kg/m".

Read MoreMar 17, 2015 · Step 2: Determine Feedwater Properties and Mass Flow. The feedwater flow rate can be calculated from steam mass flow and blowdown rate: Using the Steam Property Calculator, properties are determined using Deaerator Pressure and Quality = 0 (Saturated Liquid). The Specific Enthalpy is then multiplied by the Mass Flow to get the Energy Flow

Read MoreA boiler with a mass of 10 kg uses 54 kW to heat 20 gallons of liquid water initially at 15°C. The average specific heats for the boiler material and the water are 0.48 kJ/kg·K and 4.18 kJ/kg·K, respectively. The average density of the water is 850 kg/m 3. According to the service restrictions of the ASME Boiler and Pressure Vessel Code (ASME BPVC.IV-2015, HG-101), hot water boilers …

Read More11.23 A steam power plant operates with a boiler output of 20 kg/s steam at 2 MPa, 600°C. The condenser operates at 50°C dumping energy to a river that has an average temperature of 20°C. There is one open feedwater heater with extraction from the turbine at 600 kPa and its exit is saturated liquid. Find the mass flow rate of the extraction

Read MoreMethane is burned with air in a PA Hilton boiler to produce hot water oof 55oC. The fuel is fed at a rate of 7 kg/hr at 25 C, the air enters the boiler at a rate of 130 kg/hr at 42.5oC, and the water enters the boiler at a flow rate of 1000 kg/hr at 10oC. The composition of the dry flue gas leaving the boiler at 700oC are found to be 0.9% O 2

Read More