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- Thermodynamics A Rankine Engine-Generator unit receives 27,000 kg/hr of steam at 12 bar and 305 C and exhausts to a condenser temperature of 22 C. Brake steam rate is 4.74 kg/kW-hr, mechanical efficiency is 90 % and generator efficiency is 94 %. Determine: b) indicated engine efficiency, c) generator output (kW), d) quality of actual exhaust.1000 cfm of air at 95°F dry bulb, 74°F wet bulb is mixed with 2000 cfm of air at 65°F dry bulb, 54°F wet bulb. Determine the dry bulb temperature of the mixed stream.A. 74.7 °FB. 85.7 °FC. 98.4 °FD. 107.5 °FAir enters into a nozzle at 4 bar and leaves at 1 bar, 350 °C and 700 m/s. Determine temperature of air entering nozzle, nozzle efficiency and nozzle exit area for air flow rate of 4 kg/s. Take c_p = 1.003 kJ/kg ×K. Please answer ASAP. I will rate Positively. Not Chat GPT
- Carbon Dioxide is contained in a piston-cylinder assembly and undergoes a cycle made of the fol- lowing processes: • Process 1-2: Constant volume from 1 bar, 300 K to 600 K • Process 2–3: Polytropic expansion with n=k until P3 = P1 • Process 3-1: Isobaric compression (a) Sketch the cycle on p-v and T-v coordinates (b) Determine the work and heat transfer in each process, in kJ/kg (c) Determine the type of cycle that this is. If it is a power cycle, compute the thermal efficiency. Otherwise, compute the coefficient of performance for a heat pump cycle.The sensible and latent heat gains to a room are 10 kW and 1 kW, respectively. The occupancy of the room is 12 people and the minimum fresh air allowance is 12 Li/s for each person. The outside summer design state is: 28ᵒC dry-bulb, 19.5 ᵒC wet bulb, 10.65 g/kg dry air. The room state is: 22 ᵒC dry-bulb, 50 percent saturation, 8.366 g/kg dry air, 43.39 kJ/kg dry air. Select a suitable air state, specify the states on and off the cooler coil and calculate the design cooling load. Analyse and check the cooling load. The temperature rise through the extract system is estimated as 0.5 ᵒC. A low velocity supply system is to be adopted and the temperature rise for supply fan power and duct heat gain is estimated 2ᵒ. Minimum fresh air requirement Plot the process on the psychrometric chart Determine the SHR. Contact Factor & Bypass Factor Total Cooling load.The sensible and latent heat gains to a room are 10 kW and 1 kW, respectively. The occupancy of the room is 12 people and the minimum fresh air allowance is 12 Li/s for each person. The outside summer design state is: 28ᵒC dry-bulb, 19.5 ᵒC wet bulb, 10.65 g/kg dry air. The room state is: 22 ᵒC dry-bulb, 50 percent saturation, 8.366 g/kg dry air, 43.39 kJ/kg dry air. Select a suitable air state, specify the states on and off the cooler coil and calculate the design cooling load. Analyse and check the cooling load. The temperature rise through the extract system is estimated as 0.5 ᵒC. A low velocity supply system is to be adopted and the temperature rise for supply fan power and duct heat gain is estimated 2ᵒ. Solve for the following: 1. Minimum fresh air requirement2. Plot the process on the psychrometric chart3. Determine the SHR.4. Contact Factor & Bypass Factor5. Total Cooling load.
- Thermodynamics A Rankine Engine-Generator unit receives 27,000 kg/hr of steam at 12 bar and 305 C and exhausts to a condenser temperature of 22 C. Brake steam rate is 4.74 kg/kW-hr, mechanical efficiency is 90 % and generator efficiency is 94 %. Determine: a) ideal engine thermal efficiency, b) indicated engine efficiency, c) generator output (kW), d) quality of actual exhaust.Measured data for pressure versus volume during the compresion of a refrigerant within the cylinder of refrigeration compressor are given in the table below. Using data from the table, complete the following: (a) Determine a value of n such that the data are fit by an equation of the form, p V^n=constant. (b) Evaluate analytically the work done on the refrigerant, in BTU using Eq. 2.17 along with the result of part (a) (c) Using graphical or numerical integration of the data, evaluate the work done on the refrigerant, in BTU (d) Compare the different methods for estimating the work used in parts (b) and (c). Why are they estimates?What is the effect of overdamped state?
- t=270°C s= 6.5 kJ/kg-K What is the state of the pure substance?The Preliminary audit taken by an energy manager indicates that the daily energy consumption per hours (with 8 hours / day shift) is distributes as follows: Fuel 1: 500 Kgs, Fuel 2: 900 Kgs, Fuel 3: 820 Kg with calorific value as fuel 1: 30000Kj/kg, Fuel 2: 42000 Kj.Kg, Fuel 3: 50000 kj/Kg. The Cost of the fuel as fuel 1: Rs 30/Kg, Fuel 2: Rs. 90/ Kg, Fuel 3: Rs 50/Kg. The Production Out put is 150000 units. Clearly showing the intermediate computation, answer the following (a) What is the energy Index? (b) what is the cost Index? ( c ) Represent the energy and cost distribution on pi - diagrams and Present your interference based on the above.Wet saturated steam (x = 94.339%) at 16 bar (h,= 859 kJ/kg, hrg = 1935 kJ/kg) reducing valve is throttled at a pressure of 8 bar (h,= 721 kJ/kg. htg = 2048 kJ/kg). Determine the dryness fraction of the reduced pressure steam in %. FINAL ANSWER MUST BE IN 3 DECIMAL POINTS.