During a steady flow process, the pressure of the working substance drops from 200 to 20 psig, the speed increases from 100 to 800 fps, The internal energy of the open system increases by 15 Btu/lbm, and the specific volume increases from 1 to 10 ft3/lb. The heat lost of the open system is equivalent to 1 kW. Determine the work in hp for a mass flow rate of 12 lbm per min

During a steady flow process, the pressure of the working substance drops from 200 to 20 psig, the speed increases from 100 to 800 fps, The internal energy of the open system increases by 15 Btu/lbm, and the specific volume increases from 1 to 10 ft3/lb. The heat lost of the open system is equivalent to 1 kW. Determine the work in hp for a mass flow rate of 12 lbm per min

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 27RQ: How many Btu/h would be produced in a 12-kW electricheater?

See similar textbooks

Similar questions

During a steady flow process, the pressure of the working substance drops from 180 psia to 30 psia, the speed increases from 210 fps to 1050 fps, the internal energy of the open system decreases 30 Btu/lb, ad the specific volume increases from 2 to 10ft^3/lb.Heat loss is 20 Btu/lb. Determine the horsepower for 12 lb/min mass flow. Ans. 66hp
During a steady flow process, the pressure of the working substance drops from 200 to 20 psig, the speed increases from 100 to 800 fps, The internal energy of the open system increases by 15 Btu/lbm, and the specific volume increases from 1 to 10 ft3/lb. The heat lost of the open system is equivalent to 1 kW. Determine the work in hp for a mass flow rate of 12 lbm per min.Complete solution please. :)
1. During a steady flow process, the pressure of the working substance drops from 200 to 20 psia, the speed increases from 200 to 1000 fps, the internal energy of the open system decreases 25 Btu/lb, and the specific volume increases from 1 to 8 ft3/lb. no heat is transferred. Sketch an energy diagram. Determine the work per lb. Is it done on or done by the substance? Determine the work in hp for 10 lb per min.
1. During a steady flow process, the pressure of the working substance drops from 200 to 20 psia, the speed increases from 200 to 800 ft/s the internal energy decreases 20 BTU/b and the specific volume increases from 2 to 10 ft2/lb. no heat transferred. determined the work per Ib. it is done or by the substances? Determine the work in HP for 15 lb/min of the fluid.
During a steady flow process, the pressure of the working substance drops from 200 to 20 psia, the speed increases from 300 to 1500ft/s, the internal energy of the open system decreases 25 BTU/lb, and the specific volume increases from 1 to 8 ft3/lb. heat is lost by 10 BTU/lb. what is the kinetic energy in point 1 and 2, and flow work in point 1 and 2?
.A high altitude chamber chamber , the volume of which is 30m3 , is put into operation by reducing the pressure from 1.013 bar to 0.35 bar and temperature from 27 0C to 5 0C . How many kg of air must be removed from the chamber during the process ? Express this mass as a volume measured at 1.013 bar and 27 0C Take R=287 J/kg K for air
1. One pound of an ideal gas undergoes an isentropic process from 95.3psig and a volume of 0.6ft3 to a final volume of 3.6 ft3. If cp = 0.124Btu/lb-R and cv = 0.093 Btu/lb-R, determine the final temperature of the gas (°F) and the work done by the gas (Btu). Draw a figure, or graph that will support the problem. Explain each step by step formula.
You are replacing an HVAC system in your building. The system is a steam system that consists of a boiler that feeds several air-handling units. The total heating load for the building is 3613 thousand Btuh. The building has 15 floors in total. What is the required total flow rate (in lb/hr) of the steam to satisfy the heating load?
1. When a stationary mass of gas was compressed without friction at constant pressure, its initial state of 0.4 m3 and 0.105 MPa was found to change to a final state of 0.20 m³ and 0.105 MPa. There was a transfer of 42.5 KJ of heat from the gas during the process. How much did the internal energy of the gas change?
It is the total energy of a flowing fluid on a unit-mass basis.
Steam generators are a type of heat exchanges that are used in power plants to generate steam at desired pressure and temperature (Fig. Q1.b). In a steam generator, saturated liquid water at 30°C enters a 60-mm diameter tube at the volume flow rate of 12 L/s. After exchanging heat with hot gas, the water changes to steam and leaves the generator at a pressure of 9 MPa and a temperature of 400°C. During this process, the diameter of the water/steam tube does not change.(i) Calculate the steam mass flow rate.
Steam generators are a type of heat exchanges that are used in power plants to generate steam at desired pressure and temperature (Fig. Q1.b). In a steam generator, saturated liquid water at 30°C enters a 60-mm diameter tube at the volume flow rate of 12 L/s. After exchanging heat with hot gas, the water changes to steam and leaves the generator at a pressure of 9 MPa and a temperature of 400°C. During this process, the diameter of the water/steam tube does not change.(iii) What is the exit velocity of the steam?