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- You have invented a hydrogen‐fueled turbine engine that operates between a combustion temperature of 2500. K and an exhaust manifold temperature of 500. K. How much work does it produce per kilojoule of fuel energy if it operates at 75% of maximum theoretical efficiency?(Thermodynamics) A steady-flow system operating on the ideal Ericsson cycle can achieve the Carnot efficiency. One of the salient features of this cycle is the isothermal expansion through a heated turbine, as shown in Fig. a. Heat is added to the turbine such that the outlet temperature is equal to the inlet temperature, i.e. T₁=T₂, and the overall pressure ratio for this process is rₚ=P₁/P₂. However, an isothermal expansion through a heated turbine is very difficult to achieve in practical engineering applications. An alternate approach is two use a multi-stage expansion process with reheating. In this approach, the gas expansion process is carried out in multiple stages with reheating in between each stage. Consider the two-stage turbine expansion with reheating shown in Fig. b. The gas enters the first stage of the turbine at state A1, is expanded isentropically to an intermediate pressure Pₐ₂, is reheated at constant pressure to state B1, and is expanded in the second stage…A.) A power plant is said to have a plant use factor of 48.5% and a plant capacity factor of 42.4%. How many hours did it operate during the whole year? B.)A central station has annual factors as follows; Load Factor 58.5%; Plant Capacity factor 40.9%; Plant Use Factor 45.2%. The reserve carried over and above the peak load is 8900kW. Find annual energy production in kW-hr
- Write legibly so i can understand 3. The turbine section of a Brayton cycle gas turbine receives hot compressed air at 150 psia and 2100 o R, expands it to 15 psia and develops a gross output of 15,000 HP. Air enters the compressor at 500 R. Determine: a) Mass flow rate (lb m/s ), b) power to drive compressor (HP), c)Net power output, d.) thermal efficiency, e) mean effective pressure (psia)Write legibly, provide manual step by step solution, and diagram for below given problem. A superheat steam Rankine cycle has turbine inlet conditions of 17.5 Mpa and 530 C expands in a turbine to 0.007Mpa. The turbine and pumps polytropic efficiencies are 0.9 and 0.7 respectively, pressure losses between pump and turbine are 1.5MPa. What should be the pump work in KJ/kg? A. 17.3 C. 37.3 B. 27.3 D. 43.4A new parabolic dish solar concentrator is being developed to supply electricity to a small remote community. The system operates with a Stirling engine connected to two heat reservoirs HR₁ and HR₂ as shown in Fig. Concentrated solar radiation Q˙ₛᵤₙ=200kW maintains HR₁ at constant temperature Tₕᵣ,₁=700℃, and a high performance heat sink device maintains HR₂ at temperature Tₕᵣ,₂=25℃. After some time of operation, an engineer working on the project realizes that the engine power output is performing below design specifications and only provides a power output of 120kW. After inspecting the system, they discover a contact resistance that causes the thermal communication between the two heat reservoirs and the engine to be imperfect in the sense that a finite temperature difference is required to establish heat transfer between each of the heat reservoirs and the engine. Assuming the engine itself is internally reversible, estimate the rate of entropy generation in the engine’s…
- A new parabolic dish solar concentrator is being developed to supply electricity to a small remote community. The system operates with a Stirling engine connected to two heat reservoirs HR₁ and HR₂ as shown in Fig. Concentrated solar radiation Q˙ₛᵤₙ=200kW maintains HR₁ at constant temperature Tₕᵣ,₁=700℃, and a high performance heat sink device maintains HR₂ at temperature Tₕᵣ,₂=25℃. After some time of operation, an engineer working on the project realizes that the engine power output is performing below design specifications and only provides a power output of 120kW. After inspecting the system, they discover a contact resistance that causes the thermal communication between the two heat reservoirs and the engine to be imperfect in the sense that a finite temperature difference is required to establish heat transfer between each of the heat reservoirs and the engine. Sketch the cycle on a T-s diagram and include the temperatures of the heat reservoirs in your sketch. Calculate the…Which cyclical process represented by the two closed loops, ABCFA and ABDEA, on the PVsize 12{ ital "PV"} {} diagram in the figure below produces the greatest net work? Is that process also the one with the smallest work input required to return it to point A? Explain your responses.A heat engine receives an amount of energy Qh = 610 kJ by heat transfer from a high temperature thermal reservoir at Th = 840 K. Energy is rejected by heat transfer to a lower temperature thermal reservoir at Tl = 460 K. If the engine develops an amount of work equal to Wcycle = 160 kJ during each cycle answer the following questions. Solve for the actual efficiency that the engine is operating with.
- A CSP supercritical steam power plant using a concentrating collector arrayfor DSG (refer to Figure 8.12) is operating under the following conditions:• Plant electric power output Pel = 28 MW• Intensity of beam solar radiation incident on the concentrator apertureIbc = 798 W/m2• Aperture area of a single concentrator module Aap = 420 m2• Efficiency of the collector ηc = 0.7• Power plant thermal efficiency ηth = 0.39• Efficiency of the electric generator ηg = 0.97• HTF is water/steam• Superheated steam condition at the absorber outlet/turbine inlet:ps = 250 bars, ts = 600°C• Feedwater temperature at the absorber inlet = tw = 280°C Calculate (i) the power plant overall (electrical) efficiency, (ii) the thermal capacity of the power plant, (iii) the rate of useful heat output of aDSG collector module, (iv) the number of concentrator modules, and (v) the steam generation rate of the solar collector.An air standard gas turbine engine operates on an overall pressure ratio of 4 and between the temperature limits of 70 F and 1600 F. Assuming constant specific heats, evaluate the compressor work. The efficiencies of compressor and turbine are 0.82 and 0.92, respectively. (a) Assuming constant specific heats, evaluate the compressor work. (b) determine the turbine work (c) determine the thermal efficiencies. Show complete solution on a paper.Energy balance results (in kW) obtained for the same medium speed single cylinder diesel engine are reported in the following table. For case 1, if the coolant temperature is 105 °C at the outlet of the engine and the volumetric flow rate is 0.22*10-3 m3/s, the temperature of the coolant at the inlet is (in °C): (The coolant is considered water with a density 999 kg/m3 and a specific heat 4.2 k/kg.K). Case N (rpm) bmep (bar) W. O ambient Q ahast shaft 2.2 4.2 19.1 60.3 9.90 3.52 1 500 7.1 24.5 23.8 500 6.1 3.6 5.2 400 3.50 4.9 4.1 1.4 Select one: O a. 142.1 O b. 112.7 O c. 97.31 O d. 87.2 O e. 370.31