Cn yu do question 6 1. A boiler feedpump receives 10 °C water at a pressure of 500 kPa. The dischargepressure is 2 400 kPa. Given a pump capacity of 160 000 kg/h, and after correcting.for the temperature of the water, what is the power supplied to the water? (8 kW)2. Water is supplied to a pump at a pressure of 200 kPa. The power transferred to thewater is estimated to be 30 kW. The pump discharge pressure is 2 200 kPa and thespecific volume is 0.00106 m3/kg. Estimate the amount of water pumped in cubicmeters per min. (0.90 m3/min.)3. Air enters a compressor with a velocity of 6.0 m/s and an enthalpy of 233 kJ/kg andleaves with a velocity of 12 m/s and an enthalpy of 477 kJ/kg. Assuming adiabaticcompression and negligible change in potential energy, calculate the work required tocompress 1.0 kg of air. (244 kJ/kg)4. An air compressor is supplied with air at 101.3 kPa and a specific volume of 0.804m3/kg. The air is discharged at 700 kPa and a specific volume of 0.162 m³/kg. Theinitial and final internal energies are 37.2 kJ/kg and 114 kJ/kg respectively. Thecooling water removes 88.0 kJ/kg of air compressed. The change in kinetic andpotential energy may be neglected. Calculate (a) the specific work required, (b) thepower required given a mass flow rate of 45.6 kg/min. Also (c) if the heat beingrejected is transferred to cooling water flowing through a coil, and the cooling waterpicks up 10ºC across that coil, and the pump forcing that cooling flow has a 100 kPaAP across it, calculate the power required to drive the cooling water pump (197 kJ/kg.150 kW, 160 W)5. Wet steam is throttled from 1000 kPa to 10 kPa and 130 °C. Find the dryness fractionat state 1. [98.3%]6. Steam enters a pressure reducing valve at a pressure of 2000 kPa, dry saturated. It isthrottled adiabatically to 100 kPa. What is the temperature and internal energy of thesteam at the lower pressure. (162 °C, 2600 kJ/kg)7. A pressure reducing valve receives 5 kg/s of steam at 2MPa with a specific volume of0.1255 m³/kg and an internal energy of 2774 kJ/kg. If the pressure downstream ofthe throttle is 200 kPa and the velocity at that point is 4.25 m/s, determine to thenearest inch the required ID of the downstream piping in order to accommodate thevolume flow rate. [54.0 inches]DVI & Dual HDMI inputs for high-definition supportho

Answered: Image /qna-images/answer/853f5bb7-3b02-4367-a1b2-6142ce6b5eff.jpg

6. Steam enters a pressure reducing valve at a pressure of 2000 kPa, dry saturated. It is throttled adiabatically to 100 kPa. What is the temperature and internal energy of the steam at the lower pressure. (162 °C, 2600 kJ/kg)

6. Steam enters a pressure reducing valve at a pressure of 2000 kPa, dry saturated. It is throttled adiabatically to 100 kPa. What is the temperature and internal energy of the steam at the lower pressure. (162 °C, 2600 kJ/kg)

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

Chapter40: Typical Operating Conditions

Section: Chapter Questions

Problem 10RQ: The seasonal energy efficiency ratio (SEER) includes the energy used in the _____and _____cycles.

See similar textbooks

Similar questions

Can yu do question 2
For a 10-ton-capacity refrigeration system, the pressure of refrigerant in the evaporator is 150 kPa, whereas in the condenser it is 950 kPa. If refrigerant R-134a is used under saturated conditions, calculate the theoretical power required to operate the compressor = ... KW
What is the turbine output of 100m head and delivering 1 cu. m/ sec in a hydro electric power plant if turbine efficiency is 88%?
A refrigeration cycle operates at a flowrate of 2 lbm/hr, the enthalpy change is h = 4000 BTU/lbm,compute the refrigeration lift (tons). Determine the HP required for the compressor to be used for problem.
A steam turbine receives a steam flow rate of 2kg/s and the power output is. 700 kW. The heat loss from the casing is negligible. B. when the velocity at the entrance is 60 m/s, the velocity at exit is 360 m/s, and the inlet pipe is 3 m above ?the exhaust pipe, the change of specific enthalpy across the turbine is 700 kJ 600 kJ 400kJ non of the above
Calculate the power required by a system of one compressor serving two evaporators. One evaporator carries a load of 40 kW at 12 degree C and the other a load of 70 kW at -6 degree C. A back pressure valve reduce the pressure in the 10 degree C evaporator to that of the -5 degree C evaporator. The condensing temperature is 37 degree C. The refrigerant is 134-A. What is the COP? With TS Diagram Use this Steam Table:https://docdro.id/VkxK8WH
Seven hundred gallons per minute of water are being discharged by a centrifugal pump 5 ft above the pump inlet. The inlet pressure is 4-in Hg above the atmospheric and the discharge pressure is 29 psia. If the pump has an 8-in diameter inlet and a 4-in diameter discharge, find the pump efficiency. Assume the pump input is 8Hp.A. 55%B. 64%C. 73%D. 84%
6. A pump is delivering water from the surface of a lake to a tank 20m above at a rate of 70L/s while the pump label suggests it consumes 18kW of electric power. If all the loses and any changes of kinetic energy are negligible, a. What is the pump efficiency? b. What is the pressure rise of water in the pump?
7. A hydro-electric power station is supplied from a catchment area of 480 km? with an annual rainfall of 1100 mm and effective head of 40 metres. 20% of the rainfall is lost due to evaporation etc. The loss of head in the penstock is estimated to be 10%. The turbine efficiency is 85% and the generator efficiency is 92%. Find capacity of the plant assuming the load factor to be 0.6.
A centrifugal pump operating under steady flow conditions delivers 2,270 kg/min of water from an initial pressure of 82,740 Pa to a final pressure of 275,800 Pa. The diameter of the inlet pipe to the pump is 24 cm and the diameter of the discharge pipe is 10.16 cm. What is the work done? a. 458.1 kJ/min b. -458.1 kJ/min c. 438.4 kJ/min d. -438.4 kJ/min
a.) What are the different types of fans used in air-conditioning systems? Discuss their applications and relative advantages and disadvantages. b.) Air from an air-conditioned room is exhausted into atmosphere through a grill. The quantity of air passes through the grill is 20 cubic meter minute. The duct area leading to the grill is 0.12 m2. The static pressure behind the grill is 3 mm of water. Find the effective area of grill exhausting the air into atmosphere. Take the pressure loss passing through the grill as 0.5 mm of water. Solve both a and b Asap please , I will rate
(a) What would be the necessary bore and stroke of a single acting four- cylinder, 350 rpm ammonia compressor working on simple saturation cycle between 35°C condenser and -15°C evaporator temperatures and developing 15 tons refrigeration. Given for the compressor: Ratio of stroke to bore = 1 Volumetric efficiency = 0.7 (b) If the index of compression is 1.15, find the error introduced in calculat- ing the work of compression by assuming the process to be isentropic. Also, find the heat rejected to the compressor-jacket cooling water.