Example A 5-hp fan is used in a large room to provide for air circulation. Assuming a well-insulated, sealed room determine the internal energy increase after 1 h of operation.
Q: Duct system losses are the irreversible transformation of mechanical energy into heat. These types…
A: The duct is the passage for removing or adding air to a specific area for performing the purpose…
Q: Problem-1 Calculate the efficiency of Carnot heat engine working between high temperature…
A: Given Data
Q: 8. A single-acting reciprocating air compressor has a clearance volume of 10%. Air is received at 90…
A: Given data as per the question clearance volume =10%air recieved at 90 kpa and 302.3 kair discharged…
Q: Q1/ The air circulation in a large room by using fan (10 hp). Assuming a well-insulated, sealed room…
A: Given, Large room is well-insulated. Hence, heat transfer to and from room is zero. Hence, δQ = 0.…
Q: A pneumatic (air charged) lifting device is shown in the figure, which consists of a piston-cylinder…
A: First law of thermodynamics First law of thermodynamics says that energy can not be created nor be…
Q: A centrifugal compressor pumps 45.3 kg / m * i * n of air at 101.32kPa and .6 degrees * C to 345 kPa…
A: given data; ⇒mass of air (m)=45.3kg/min =0.755kg/s⇒inlet…
Q: Consider a facility that has a 130-kW compressor that runs 4400 h/yr at an average load factor of…
A: Given data: *The power of the compressor is P=130 Kw. *The time rum by the compressor in a year is…
Q: Q3. An air compressor requires shaft work of 200 kJ/kg of air and the compression of air causes…
A: Heat is the form of energy which occurs due to the thermal variation. Heat transfers from high…
Q: A wind turbine is installed in a location where the wind blows at 8 m/s. The air temperature is 10°C…
A: Given data: *The velocity of the wind at the location of the wind turbine is v=8 m/s. *The…
Q: A reciprocating compressor draws in 500 ft/min of air whose density is 0.079 Ibm/t° and discharges…
A: Given data: v=500 ft3/min=39.5 lb/minρ1=0.079 lbm/ft3ρ2=0.304 lbm/ft3p1=15 psiap2=80 psia∆u=33.8…
Q: Q2. ( A steam generation unit in power plant operates at a constant pressure of (8 bar) and the…
A: Let the inlet denotes state 1 and outlet denotes state 2 Given, m˙=500 kg/h=5003600 kg/s=0.1388 kg/s…
Q: FIRST LAW OF THERMODYNAMICS CONSERVATION OF ENERGY – OPEN SYSTEM An air compressor is designed to…
A:
Q: 1- single cylinder single acting compressor has pressure and temperature at the section line of…
A: Volumetric efficiencyηv of the compressor is defined as the ratio of actual volume flow rate to the…
Q: A fan-cooled computer contains eight printed circuit boards, each dissipating 10 W of power. The…
A:
Q: A 600-MW steam power plant, which is cooled by a nearby river, has a thermal efficiency of 40…
A: Given The power output of steam power plant = 600 MW ηt = 40 percent To determine Amount of…
Q: Helium is used in the Carnot engine where the volumes beginning with constant temperature heat…
A:
Q: A fluid, contained in a horizontal cylinder fitted with a frictionless leak proof piston, is…
A: Given data: The diameter of the cylinder is D = 0.40 m. The time of the stirring process is t = 10…
Q: P = 2 MPa T = 400°C V = 50 m/s 21 = 10 m Q4: (Section B) The power output of an adiabatic steam…
A:
Q: change
A:
Q: In a refrigerator the pressure in the evaporator us 2.72 kg/cm sq. and the refrigerant entry is 0.12…
A: Pressure in the evaporator, P=2.72 kg/cm2 Work done per kg, W=17033 kg-m/kg Refrigeration…
Q: It is common knowledge that the temperature rises as it is compressed. An inventor thought about…
A:
Q: .The refrigerant volume flow rate at the entrance of compressor were obtained from a test on a twin…
A:
Q: 1. An engine developer proposes one that has an operating temperature of 28°C surface of the water…
A: from clausius inequality ∮δQT≤0 for the process to be possible heat absorbed from top surface =…
Q: pump lift water at a rate of 300 lps from a lake and force and force it into a tank 10 meter above…
A:
Q: The temperature of the reservoir of a Carnot engine, operating with an efficiency of70% is 1000K.…
A:
Q: A reciprocating compressor draws in 500 cubic feet per minute of air whose density is 0.079 lb/ft^3…
A: Given data: m˙=500 ft3/min=39.5 lb/minρ1=0.079 lb/ft3ρ2=0.304 lb/ft3∆U=33.8 BTU/lb∆Q=13 BTU/lb Need…
Q: 2. Water is pumped from a lake to a storage tank 20 m above at a rate of 95 L/s while consuming 22.3…
A: Given data: (a) The power required to pump the water can be calculated as Substitute the known…
Q: Q4: A centrifugal fan for ventilation plant has inlet and outlet area of 0.14 m2 and 0.15 m2…
A: Guage Pressure: The pressure that is measured relative to the atmosphere is known as gauge pressure.…
Q: There is no useful work transfer associated with boundary work when the pressure of the system is…
A: Whenever the boundary of a control volume changes, the surrounding air due to atmospheric pressure…
Q: A reciprocating compressor draws in 500 gal per minute of air whose density is 0.079 lbm/cu ft and…
A:
Q: A reciprocating compressor draws in 500 cubic feet per minute of air whose density is 0.079 lb/cu ft…
A: Answer: (a) The work done on the air is 2384.40 Btu/min. (b) The work done on the air is 56.24 hp.…
Q: The maximum efficiency of a heat engine works between 660 K and 323 K is
A:
Q: A steam power plant of 40% thermal efficiency receives heat of 150 MJ at high temperature while…
A: given data:- efficiency = 40 % heat supplied = 150 MJ work supplied to pump = 10 MJ find , a) heat…
Q: 6.0 Steam is supplied to a fully loaded steam turbine 50 -hp steam turbine at 200 psia with ft BTU…
A:
Q: Q.: In a test of water cooled air compressor, it is found that the shaft work required to drive the…
A: Given data: Outlet enthalpy (h2) = (h1+70) kJ/kg Work required for the compressor (W) = -175 kJ/kg…
Q: Two Carnot heat engines run in series with the efficiency of first engine is k times the second. If…
A:
Q: An oil-transfer pump uses 1 kW of power in transferring 5 kg/s of oil through a 3-cm-diameter pipe.…
A:
Q: An air compressor takes in air at a pressure of 100 kPa and a temperature of 300K The compressor is…
A:
Q: 3. The pump of a water distribution system is powered by a 15 kW electric motor whose efficiency is…
A: As per given Efficiency of electric motor=90% Pump power =15kw Volume =50L P2=300kpa P1=100kpa We…
Q: Compute the total work done by a gas system following compression processes as shown below. Express…
A:
Q: Water is pumped from a lake to a storage tank 15 m above at a rate of 70 L/s while consuming 15.4 kW…
A: Given data water tank elevation (h) = 15 m density of water (ρ) =1000 kg/m3 volume flow rate (v˙)…
Q: Helium is used in a Carnot engine where the volumes beginning with the constant temperature heat…
A:
Q: EX 3-2: A fan that consumes 20 W of electric power when operating is claimed to lischarge air from a…
A:
Q: A reciprocating compressor draws in 500 cubic feet per minute of air whose density is 0.079 lb/ft^3…
A: Answer: The work on the air is 60.364222 BTU/lb (56.235 HP).
Q: A wind tunnel is considered to be a steady-state operation, the system receives one hundred fifty…
A:
Q: On a hot summer day, the air in a well-sealed room is circulated by a 0.50-hp fan driven by a 65…
A: This question is based on the concept of thermodynamics.
Q: A steam turbine operates with 1,6 MPa and 350 deg C steam at its inlet and saturated vapor at 30 deg…
A:
Q: Q6. A small size cooling tower is designed to cool 400kg of water per minute. The water enters the…
A:
Q: determine the amount of electric energy and the revenue generated per day for a unit price of RM0.40…
A:
Q: Steam expands steadily at a constant temperature. The flow rate is 13.6 kg/min with an inlet state…
A: To obtain the enthalpies of the steam at the state 1 and state 2, we need to understand that the…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- 1. Moist air enters a refrigeration coil at 89 F dry-bulb temperature and 65 F thermodynamic wet bulb temperature at a rate of 14oo cu ft per min. The surface temperature of the coil is 55 F . If 3.5 tons of refrigeration are available, find the dry bulb and wet bulb temperatures of the air leaving the coil. Assume sea level pressure..The refrigerant volume flow rate at the entrance of compressor wereobtained from a test on a twin cylinder single acting 15 cm x 20 cm, 320 rpmcompressor ammonia refrigerating plant 33 L/s. Determine the volumetricefficiency of the compressor.Box the final answer. Write legibly. Steam is supplied to a fully loaded 1.2 MW turbine at 1.2 mpa with internal energy of 2,620 kJ/kg, specific volume of 0.12 m3/kg and a speed of 120 m/s. The exhaust is at 20 kpa with internal energy of 2,420 kJ/kg, specific volume 8.2 m3/kg, and speed of 220 m/s. The heat loss from the steam in the turbine is 120 kJ/kg, compute the steam flow in kg per minute neglecting the effect of elevation.
- A fan-cooled computer contains eight printed circuit boards, each dissipating 10 W of power. The height of the cards is 12 cm and their length is 18 cm. Cooling air is supplied by a 25W fan mounted at the inlet. If the air temperature rise is not to be greater than 10 ° C as it passes through the computer case, determine (a) the air flow rate that the fan must deliver and (b) the fraction of the air temperature rise due to heat generated by the fan and its motor.Define the energy equation of a uniformflow system reduces to that of a closed system when all the inlets and exits are closed.2. A centrifugal compressor pumps 45.3 kg / m * i * n of air at 101.32kPa and .6 degrees * C to 345 kPa and 132 degrees * C by an irreversible process. Thetemperature rise of 22.1 kg / m * i * n of circulating water about the casing is6.7°C. What is the horsepower required? Neglect kinetic energy changesand no heat loss to surroundings.
- Helium is used in the Carnot engine where the volumes beginning withconstant temperature heat addition are V 1 = 0.3565 m^3 ; V 2 = 0.5130 m^3 ; V 3 = 8.0m^3 ; V 4 = 5.57 m^3 . Determine the thermal efficiency. Use 1.66 as the specificratio of helium. show diagramA motor-pump system with 90% efficiency is designed to increase the pressure of was from 101kPa to 250 kPa while water is flowing at a rate of 2 m^3/s. Assuming no change in the kinetic and potential energy of water, what is the expected electric power usage of the system?A compressor is fed with superheated steam at 300°C and 20 bar. The compressor inlet speed is 20 m/s and the internal diameter is 0.1 m. The discharge tube, after the compressor, with a smaller diameter is 170 m/s. Compressor output is superheated steam at 300°C and 20 bar. The heat loss from the compressor to the surroundings is 5 kW. Determine the work generated by the compressor in hp.
- I am given a problem about a booster fan in a circular duct with a diameter of 30cm. The work done on the system by the fan is 80 W, causing an increase of pressure on the outlet side of the fan of 70 Pa. All other work and energy is negligible. How do I find the maximum velocity of the air in the duct?In rural housing the water source is obtained through groundwater pumped upwards. Suppose the groundwater source has a depth of 60 m from the surface. The water will be lifted as far as 5 m above ground level with a pump. The diameter of the pipe inlet is 10 cm and the outlet is 15 cm.By ignoring the interaction of heat with the environment and heat due to friction, determine the input work (Watt) required by the pump for the water to flow stable at a rate of 15 liters / s. (Water type mass 1000 kg / m ^ 3). (Application of the 1st Law of Thermodynamics to open systems)Solve the problem. A reciprocating compressor draws in 500 cubic feet per minute of air whose density is 0.079 lb/cu ft and discharges it with a density of 0.304 lb/cu ft. At the suction, pressure is 15 psia, at discharge pressure is 80 psia. The increase in the specific internal energy is 33.8 Btu/lb and the heat transferred from the air by cooling is 13 Btu/lb. Determine the work on the air in Btu/min and in hp. Neglect change in kinetic energy.