Q2: 26 tons of ice from and at 0°C is produced per day in an ammonia refrigerator. The temperature range in the compressor is from 26°C to -15°C. The vapour is dry and saturated at the end of compression. Assuming actual COP is 62% of theoretical, calculate the power required to drive the compressor. Take latent heat of ice 335 kJ/kg.

Q: A potato gun has backing pressure of 3.4MPa. You want to make one that can get at least 4.0MPa. The…

A: Let us discuss isentropic compression in a compressor.

Q: A piston/cylinder system compresses saturated water vapor at 500 kPa to 2500 kPa, V₂=v₁/3 The system…

A: The initial pressure is The final pressure is The initial state is saturated vaporThe final volume…

Q: 2000 kg cast iron hoisin at 350 degree Celsius is quenched in 4000 kg of water at 15 degree Celsius.…

A: Given that , mass of cast iron (mci)=2000kgIntial temperature of cast iron(Ti)=350°C=623Kmass of…

Q: Refrigerant 134-a enters a compressor at 320kPa as a saturated vapor with a flow rate of

A:

Q: A hot water boiler heats 2,800 lb/hr of water from 50oF  to 220oF, at 40 psia.  How much heat is…

A: Given data⇒Mass flow ratem=2800lbhrT1=50°FT2=220°FP=40 PsiaProblem definition⇒How much heat is added…

Q: A 130 L rigid tank initially contains nitrogen at 400 kPa, 100 K. The tank is connected to a line…

A: Given: The volume of the tank, V = 130 L The pressure inside the tank, P1 = 400 kPa The temperature…

Q: An isentropic air compressor takes 150 m/min of air in at 10°C and 100kPa and compresses it to 1000…

A: Given: Flow rate (Q)=150m3/min Inlet temperature T1=10°C or 10+273=283K Inlet pressure P1=100kPa…

Q: How much work was required (kJ)?

A: take properties from steam table here state 1 is super heated state and 2 is sub cooled state.so…

Q: 50 btu of heat are added to a gas at a constant temperature of 600 F. How much of this heat is…

A: Given Data: The heat added at temperature TH  = 600 F is Q = 50 Btu. The refrigerator temperature…

Q: Helium at 100 kPa, 500 K is in a piston/cylinder setup and is compressed to a final pressure of 800…

A:

Q: an ideal adiabatic compressor compresses air from 1 atm to 5atm. The inlet temperature is 293K and…

A:

Q: Air enters an adiabatic nozzle at 230 kPa, 600°C with a velocity of 60 m/s. The air is at 70 kPa,…

A:

Q: 1 1 Helium is compressed through a compressor steadily. At the inlet the pressure is P₁ = 100kPa and…

A:

Q: a line at 0,7 MPa and 40 IS attached tO a tank that Contains little water (assume zero initial…

A: Solution is given below:

Q: Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be…

A: Given: The air compressed by compressor m=10 Ls The pressure at inlet P1=120 kPa The temperature at…

Q: 3kg of Co2 expanded in a stationary piston cylinder through a polytropic process from 30 degree…

A: T1= 30+273= 303K, m=3kgP1=250KPa, P2=100KPan=1.45T2T1= 1002501.45-11.45=228.014KTotal Work, W=…

Q: 1 1 Helium is compressed through a compressor steadily. At the inlet the pressure is P₁ = 100kPa and…

A:

Q: R-134a fills a 0.1-m³ capsule at 20°C, 200 kPa. It is placed in a deep freezer, where it is cooled…

A: Soln:- C. v. R- 134a out to the -20°c space. Energy equation :-  m(u2-u1) = 1Q2- 1W2 Actual process…

Q: 200Kg/min superheated steam at 40 bar and 350C enters a turbine through a 7.5cm ID pipe. It exits at…

A:

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.