A pump is used to circulate hot water in a home heating system. Water enters the well-insulated pump operating at steady state at arate of 0.42 gal/min. The inlet pressure and temperature are 14.7 Ibf/in.?, and 180°F, respectively; at the exit the pressure is 120Ibf/in.? The pump requires 1/ 15 hp of power input. Water can be modeled as an incompressible substance with constant density of60.58 lb/ft³ and constant specific heat of 1 Btu/lb · °R.Neglecting kinetic and potential energy effects, determine the temperature change, in °R, as the water flows through the pump.

Answered: Image /qna-images/answer/3802f352-b511-4418-9ab6-aeda7e69007d.jpg

Answered: A pump is used to circulate hot water…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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One-quarter Ibmol of oxygen gas (O2) undergoes a process from p1 = 20 lb;/in?, T1 = 500°R to p2 = 150 Ib/in?. For the process W = -500 Btu and Q = -152.5 Btu. Assume the oxygen behaves as an ideal gas. Determine T2, in °R, and the change in entropy, in Btu/PR.
pls answer the given
In a steam turbine, water vapor enters at a temperature of 450C and a pressure of 2.5 MPa, at a speed of 60 m/s at a height of 12 m, and at a pressure of 20 kPa at a speed of 0.85 degrees of dryness, at a speed of 180 M/s at a height of 6 m. During this process, a power generation of 5 MW occurs. According to the given; a) compare kinetic, potential and enthalpy changes. b) calculate the work done by the unit mass of steam flowing from the turbine. c) calculate the mass flow of steam.
Water vapors at 40 bar enters a pipe fitting (adapter) with a velocity of 169 m/s and exits thefitting at 10 bar and 572°F. If the temperature at the inlet is 1004°F., calculate the exit velocity.The system is assumed to be at steady state.
Carbon dioxide (molar mass 44 kg/kmol) expands reversibly in a perfectly thermally insulated cylinder from 3.7 bar, 220 0C to a volume of 0.085 m3. If the initial volume occupied was 0.02 m3, calculate the final pressure in bar to 3 decimal places. Assume nitrogen to be a perfect gas and take cv = 0.63 k J / k g K.
37. A certain gas with Cp = 2.215 KJ/kg °K and R= 0.518 KJ/kg °K with a volume of 0.425m3 and 300 °K has an initial pressure of 106.869 KPa.Heat is added at constant volume until the final pressure becomes 387.72 KPa. How much heat is added?
An oxygen gas R = 0.2598 KJ/kg°k and k = 1.395. If 4 kg of oxygen undergo a reversible non flow constant pressure process from initial volume =1.2 cubic meter and initial pressure = 690 kPa to a state where final temperature = 600°C. 1. Determine the Change in Internal Energy. choices: a.200.60 KJ. b.198.45 KJ. c.99.54 KJ. d.200.55 KJ 2. Determine the constant pressure-specific heat. choices: a.0.9865 KJ/kg-°K. b.0.9175 KJ/kg-°K. c.0.8580 KJ/Kg-°K. d.0.7843 KJ/kg-°K need complete solution, cancellation and symbol:)
kg). Q3. The steam at 215 bar and 500 °C is supplied to a steam turbine. It expands to 40 bar and 280 °c. It is then reheated to 490 °C and expands to 8 bar and 270 °C. The steam coming out from the second expansion of the turbine is further reheated to 490 °C and expands to condenser pressure of 0.07 bar. The steam entering into the condenser is dry saturated. Assuming the pressure losses in first heater of 1 bar and in second heater 0.5 bar, find (a) the thermal efficiency and power developed if the flow of steam is 10 kg/s (b) the isentropic efficiency of the expansion stages. Neglect the pump work. Mis-n-n (42.8 %, 1738 kW,78.5%,95.4 %, 87%) Q4. The steam nt 100
(2.) Steam enters a turbine with an enthalpy of 1292Btu/lb and leaves with an enthalpy of 1098 Btu/lb. The transferred heat is 13 Btu/lb. what is the work in kW and in hp for a flow of 2 lb/sec? draw a figure also, and explain each step by step solution.
Helium expands polytropically through a gas turbine according to the process PV^1.419 = C. If the turbine produces 27.09 MW,. determine the heat transferred in kJ/s.
Please show the complete solution.
Still Air, 101.3 kPa, 15°C The image above is of a jet engine flying to the right at speed 254 meters/sec through still air. The engine inlet area is 0.9 m². Determine the mass flow rate of the air into the engine in kg/sec. You answer should include one unit after the decimal place.

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