Q1/ Find the Coefficient of Performance of refrigerator with R-134a as the working fluid has a minimum and maximum temperature are -30°C and 1 Mpa, respectively.
Q: (3-2) A turbe generator has a combined steam rate of 5.3 kgkwh at ita rated output of 20,000 kW. The…
A: To given thatsteam rate,(SR)=5.35kg/kwhworkdone,(W)=20000KWInlet…
Q: 1- Draw Torque vs. angle of twist for steel specimen
A: INTRODUCTION : Whenever the specimen subjected to the twisting moment that is torque, the stress…
Q: 47 It is the amount of heat required to raise the temperature of a given mass by 10C ? Select one:…
A: Heat capacity is the amount of heat required to raise the temperature of a given mass by 1°C.
Q: A radiation shield that has the same emissivity 3 on both sides is placed between two large parallel…
A: Given : T1 = 650K T2= 400K e1=0.6 ; e2=0.9 e3 = ?
Q: 2- mass flow rate is
A: To find Enters density mass flow rate
Q: What is the tension module in the rope? 2. Determine the module of the horizontal and…
A:
Q: the vertical reaction force acting under a runner's foot is 2000 N, while the frictional force is…
A:
Q: Determine the drag coefficient ca needed for a parachutist of mass m = 68.1 have a velocity of 40…
A: Equation for free fall =velocity of an objectv(t)=gmCd[1-e-Cdmt]m=68.1gmv=40m/st=10sg=9.8m/s2so…
Q: 2. Determine the reaction at roller A and Hinge B. 300 lb
A: According to the details provided in the question, we need to calculate reactions at point A and B
Q: phase diagram (a) below, briefly des the mechanisms of precipitation hardening/strengthening o…
A: Precipitation hardening is a heat treatment procedure that may be used to strengthen aluminium…
Q: find v1,v2,p1,p2 and reach x.
A:
Q: Given problem: a.) Calculate the thermal efficiency of an air-standard Diesel cycle operating with…
A:
Q: In the final stages of production, a pharmaceutical is sterilized by heating it from 25 to 75°C as…
A:
Q: The SI unit for all energy measurement is called? a. Joule b. calorie c. BTU d. watt
A: The SI unit for energy measurements is called JOULE. Joule is defined as the amount of energy…
Q: The gage pressure of the air in the tank shown in figure Q1(b) is measured to be 80 kPa and height…
A:
Q: A simple ideal Rankine cycle with water as the working fuid operates between the pressure limits of…
A:
Q: A steel bar 50 mm in diameter and 2 m long is surrounded by a shell of a cast iron 5 mm thick.…
A:
Q: An ECM operation is used to cut a square-shaped blind hole into a nickel block (valence = 2). The…
A:
Q: A 3-m3 rigid tank contains hydrogen at 250 kPa and 550 K. The gas is now cooled unti its temperature…
A:
Q: Q1/ A 13-kN force is applied as shown to the 60-mm-diameter cast-iron post ABD. At point H,…
A:
Q: A steam power plant operates on a cycle for the following conditions. Determine (a) steam rate (b)…
A:
Q: Which of the following is true for a closed system?
A: We know that, for a closed system, mass does not enter or leave the system. Only energy transfer…
Q: Consider a square-faced beam | supporting a section of a building. a) d b) c) m2 lo lo d+Ad (a)…
A: Given Data: l0=15.01 ml=14.92mm=31000 kgd=1.1 m
Q: 2. A quick-acting vise, used as a production fixture, works by action of the toggle controlled by an…
A: A flexible fast acting tight clamp having a switch activity switch following up on a couple of…
Q: 125 mm 175 mm D -225 mm- 75 mm 150 N Fig.3
A: Answer: (a) The tension in cable ABD is 195 N. (b) The reaction at support C is 216.33 N at an angle…
Q: Compute the circular pitch (in inch) of a pair of gears having a ratio of 4 and a center distance of…
A: Compute the circular pitch (in inch) of a pair of gears
Q: (b) A portal frame ABCD is hinge-supported at A and roller-supported at D, as shown in Figure Q2(b).…
A:
Q: A food processing plant that is designed to use 6.35 metric tons of 316 stainless steel will…
A: Here, 5.35 metric tonnes of 316 stainless steel in terms of grams. M=5350000 gm Here, plant use 115%…
Q: Q4 For the circuit shown in Figure below, calculate the current dr and husing the mesh analysis…
A:
Q: For the following process: Saturated liquid water, initially at 25°C contained inside a tank, is…
A: Three single phase zones (liquid, vapour, and supercritical fluid) are represented on the Tv…
Q: The position of the particle is given by s = (2t2 − 8t + 6)m , where t is in seconds. Determine the…
A:
Q: Q2: Liquid water at 20°C flows straight up 30 m. 1- How much power pump is needed if the mass flow…
A: Given data: The verticle height to be covered by the water is h = 30 mThe density of the water is ρ…
Q: 1. A compound beam is loaded as shown. Draw shear force and bending moment diagrams for the beam. 2…
A:
Q: The pressure altitude of an aircraft is usually different from the temperature altitude. •C '1
A: As per our guidelines we can answer only first question. Kindly post the remaining questions in the…
Q: A 9.5 tonnes capacity of ammonia refrigerator operates between evaporator and condenser temperature…
A: The vapor compression refrigeration cycle consists of four processes. Isentropic compression,…
Q: Consider the vessel in which the wall thickness of the cylindrical and hemispherical portions has a…
A:
Q: Consider a pond whose energy budget is dominated by radiation. The pond is disk-shaped, with a…
A: The emissivity, ε, of the outer layer of a material is its viability in discharging energy as warm…
Q: The ball B has a weight of 5 lb and is originally rotating in a circle. As shown, the cord AB has a…
A:
Q: 20 15 cm
A: Given:- Weight of cat ,Wcat=4 kg,Weight of board ,Wboard=2 kg,angle made by rope with vertical…
Q: 450 b 300 b Fig.5 Q5: Determine the horizontal and vertical components of reaction at the pin A and…
A: Let horizontal and vertical reactions at the pin A are represented as RAX and RAY respectively. Let…
Q: fv, *2(1) K1 K2 M2 fv (a) F(s) G(s) (b) Figure 1 Given in Figure 1 (a) Two-degree-of freedom…
A:
Q: List several types of flexible drive system and its application in real engineering.
A: To find :- flexible drive system and its application in real engineering.
Q: Bonus problem) Analyze the following frame degrees of freedom. Find reactions and finally, ustant…
A: 1 Free BMDBMAB(Maximum)=WL4=12×124=36kip.ftBMBCMaximum=Wl28=3×1228=54kip.ft2Area of BMDFor span…
Q: e necessary static frictional force between the wheel andomized. Your answer must include 2 places…
A:
Q: 4) A closed system that is based on the Carnot heat engine cycle uses 60 g of water vapor (steam) as…
A:
Q: slider mechanism. Link AB rotates on a counterclockwise manner with angular velocity of 6 rad/s.…
A:
Q: Consider two cases involving parallel flow of dry air at V=V= 2.5 m/s, T∞=45°C, and atmospheric…
A:
Q: you design a custom refrigeration system using 1,1,2-tetrafluoroethane (R-134a) as refrigerant. You…
A: P2=P3=9bar =900 kPa (Condensor) P1=P4=2 bar =200kPa (Evaporator) 1-2 =isentropic compression…
Q: orizontal flexible cable as s e which is hinged at the bot ne the tension in the cable.
A:
Q: A Closed tank of water with Length, I = 20 ft Height, h = 10.45 ft %3D Width, w = 5.6 ft %3D Pgage =…
A: Given: Length of the tank→L=20 ft Height of the tank→h=10.45 ft Width of the tank→w=5.6 ft Because x…
Step by step
Solved in 2 steps with 2 images
- Note : Use the relevant chart for each problem 3. A vapour compression refrigerator uses R-12 as refrigerant and the liquid evaporates in the evaporator at - 15 °C. The temperature of this refrigerant at the delivery from the compressor is 15°C when the vapour is condensed at 10°C. Find the coefficient of performance if (i) there is no undercooling , and (ii) the liquid is cooled by 5°C before expansion by throttling. Take specific heat at constant pressure for the superheated vapour as 0.64 kJ/kg.K and for liquid as 0.94 kJ/kg.K. (Same as Example 12) Please solve the question on a piece of paper and using tables with illustrationsAn engine has a thermal efficiency of 40%. It is used to drive a refrigerator having a COP of 5.0.Heat Removed from the cold body by the refrigerator is 1 kJ. What should be the heat input to theengine?Q.7 The COP of the heat pump is found to be 5.62, and the heat pump operates with the source at 25°C, while the heat absorbed is 2.12 kW. What is the amount of heat rejected ?
- A carnot engine requires 40 kw from the hot source. The engine produces 18 KJ/s of power and the sink temperature is 20 degree celcius, what is the temperature of the hot source in Celcius?.The thermal efficiency of a heat engine is 30%, the heat rejected from the engine is 30kJ, evaluate the heat input to the engine.b- A vapour compression refrigerator uses refrigerant (R – 410a) and operates between temperature limits of -10°C and 45 C. At entry to the compressor, the refrigerant is dry saturated and after compression it acquires a temperature of 60°C. Find the C.O.P. of the refrigerator.
- A cold storage plant of 30 tonnes of refrigeration capacity runs with its performance just th of its 25% of Carnot COP. Inside temperature is -10°C and atmospheric temperature is 25ºC. Calculate the power required to run the plant. [Note: 1 ton of refrigeration = 3.52 kW]3.0 A cold storage is to be maintained at -5°C while the surroundings are at 35°C. The heat leakage from the surroundings into the cold storage is estimated to be 30 kw. The actual C.O.P. of the refrigeration plant used is one third that of an ideal plant working between the same temperatures. Find the power required to drive the plant.3.0 A cold storage is to be maintained at -5°C while the surroundings are at 35°C. The heat leakage from the surroundings into the cold storage is estimated to be 28 kW. The actual C.O.P. of the refrigeration plant used is one fourth that of an ideal plant working between the same temperatures. Find the power required to drive the plant.
- 3.5 An ammonia refrigeration system operates between saturated suction temperature of -20°C, and saturated discharge temperature of +40°C. Com- pare the COP of the cycle using wet compression with that of the cycle using dry compression. Assume that the vapour leaving the compressor is saturated in the case of wet compression, and the vapour entering the compressor is saturated in the case of dry compression. The refrigerant leaves the condenser as saturated liquid.Steam is delivered by a steam generating unit at 1100 psia and 900 F. After expansion in the turbine to 300 psia, the steam is withdrawn and reheated to the initial temperature. Expansion now occurs to the condenser pressure of 1psia. Find:a. For an ideal engine operating through the same states, but ignoring the pressure drop in the reheater, find the work and engine efficiency. b. An actual turbine operates between these same state points except that steam enters the reheater at 300 psia, 600 F and leaves at 290 psia, 900 F. The combined steam rate is 6.3 lb/ HP-hr, the generator efficiency is 94%, and the heat loss through the turbine casing is 1% of the throttle enthalpy. Find the turbine efficiency and the approximate quality or degree SH of the exhaust steam.A heat pump operates between 36 degrees fahrenheit and 120 degrees fahrenheit . If heat added from the low temp. region is 500 BTU/min. Find the horsepower needed for the compressor power.