6-55 Refrigerant-134a enters the condenser of a residen- tial heat pump at 800 kPa and 35°C at a rate of 0.018 kg/s and leaves at 800 kPa as a saturated liquid. If the compres- sor consumes 1.2 kW of power, determine (a) the COP of the heat pump and (b) the rate of heat absorption from the outside air.
Q: |Consider these statements: (1) The reason of thermal expansion is 'asymmetry' in potential energy…
A: Given, Thermodynamics properties
Q: A basketball player does 4.81 * 105J of work during her timein the game, and evaporates 0.151 kg of…
A: With the help of the First Law of Thermodynamics, we have, ∆U=q+w where ∆U= change in internal…
Q: A piston–cylinder device initially contains 0.35-kg steam at 3.5 MPa, superheated by 7.4°C. Now the…
A: Given: A piston-cylinder device initially contains 0.35-kgsteam at 3.5 MPa, superheated by 7.4°C.…
Q: An insulated piston-cylinder device contains 0.05 m³ of saturated frigerant-134a at 32°C. The…
A:
Q: Consider a Carnot refrigeration cycle executed in a closed system in the saturated liquid–vapor…
A: Given,
Q: (a) How much food energy (in kcal) will a man metabolize in the process of doing 36.7 kJ of work…
A:
Q: a) A Canot heat engine receives heat from a reservoir at 700 C at a rate of 600 kJ/min and rejects…
A: Given: Heat received QH = 600 kJ/min. Temperature of Carnot engine TH=700 oC=973.15 K Temperature of…
Q: Carnot refrigerator extracts heat from a freezer at -5.00°C and exhausts it at 25°C. How much work…
A: Given T1 = 25 0 C = 25+273 = 298 K T2 = 273 -5 = 268 K Heat extracted Q2 = 1 J
Q: 3 A aas with inital volume of o.0am° expands in a piston -cylinder assembly from 8 bar to 2 bar in a…
A: Solution:-Given thatInitial volume of gas (V1)=0.02 m3Initial pressure (P1)=8 bar=8×105 PaFinal…
Q: In exercising, a weight lifter loses 0.111 kg of water through evaporation, the heat required to…
A:
Q: 3.00 moles of Ne gas irreversibly and isothermally expands from an initial volume of 4.00 final…
A: Given, the number of moles of gas, n = 3.00 moles initial volume, Vi=4.00 L final volume, Vf=17.00…
Q: when theautside temperature is -5. °C, a building is maintained àt a température of 22°C by means of…
A: Heat pump is a device that transferes heat from a source to a sink. A reversible heat pump is…
Q: Air enters a compressor operating at steady state at 1.05 bar, 300 K, with a volumetric flow rate of…
A: Given,P1=1.05 barT=300Kv=75m3/minP2=12 barT2=400KQ=-12.5 kW
Q: A system consisting of an ideal gas at the constant pressure of 120kPa gains 960 J of heat. Find the…
A: (a) The work done is W=PΔV Here, P is the pressure of the gas, ∆V is the change in volume. The…
Q: An inventor claims to have built an engine that produces 2.00 MW of usable work while taking in 3.00…
A: Solution:Here the actual efficiency will be:Y = WθH =23 = 0.67…
Q: PLEASE ANSWER IT ASAP FOR AN UPVOTE.
A: Given that R-134a property table has given and mean points can be found as,…
Q: A balloon holding 4.50 moles of oxygen (0,) gas absorbs 935 J of thermal energy while doing 112 J of…
A:
Q: 2.00 kg of water has a volume of 2.00 x 10-3m3 when in the liquid state at 100 °C. When the water is…
A:
Step by step
Solved in 4 steps
- Part (a) The second step in the Otto cycle is isochoric (constant-volume) heating. Calculate the heat absorbed by the gas during this process, in joules, if the temperature is increased so that T3 = 1.53T2. Part (b) Calculate the pressure at the end of the isochoric heating step, in pascals, to three significant figures. Part (c) The third step in the Otto cycle is adiabatic expansion, which brings the volume back to its initial value. Calculate the work preformed on the gas, in joules, during the third step. Part (d) The fourth and last step in the Otto cycle is isochoric cooling to the initial conditions. Find the amount of heat, in joules, that is discharged by the gas during the fourth step. Part (e) Calculate the efficiency of this Otto cycle, expressed as a percent.(a) When the steam engine is running between 120°C and 30°C, how many Js of calories are there in the heat source to get 1000 Js of work? (b) When an ideal gas with Cp=5 cal/(mol·K) is compressed to 25°C, and 10°C through an adiabatic and reversible process, what is the final temperature of the gas? (c) In an ideal gas turbine power device, the pressure ratio is 6, the temperature entering the compressor is 27°C, and the maximum allowable temperature of the turbine is 816°C. What is the efficiency of this power device when it is carried out in reversible operation? However, the specific ratio is 1.4.Long cylindrical steel rods (r = 7833 kg/m3 andcp = 0.465 kJ/kg·8C) of 10-cm diameter are heat treated bydrawing them at a velocity of 3 m/min through a 7-m-longoven maintained at 900C. If the rods enter the oven at 30Cand leave at 700C, determine (a) the rate of heat transfer tothe rods in the oven and (b) the rate of entropy generationassociated with this heat transfer process.
- Muhammad is Mechanical Engineering for Boeing, and designs a refrigerator that is to be used in the International Space Station (ISS) for Biology experiments. The biological samples are cell cultures, which primorily consist of water and have an average mass of 375 g. These samples are initially ot a temperature of 23°C but must be frozen and tooled to a temperature of' -20°C for'storage.If Muhammad's refrigerator uses 25 KJ of work to do this, what is its coefficient of performance?..48 GO As a gas is held within a closed chamber, it passes through the cycle shown in Fig. 18-41. Determine the energy transferred by the system as heat during constant-pressure process CA if the energy added as heat QAB during constant-volume process AB is 20.0 J, no energy is transferred as heat during adiabatic process BC, and the net work done during the cycle is 15.0 J. Pressure B A C 0 Volume Figure 18-41 Problem 48.There is a 19KG air mass. It is warmed from 28°F to 86°F under the constant pressure of 645MB. Determine the following: (1) Total change in internal energy, (2) Heat absorbed by the air, and (3) Work done.
- 20-2 An ideal gas undergoes the thermodynamic process shown in the PV 2P. diagram in the figure. Determine whether each of the values (a) AU, (b)W, (c)Q for the gas is positive, negative, or zero. (Note that Wis the work done on the gas.) Hint: First use the ideal gas law to find the initial and final temperatures in terms of Po and Vo and determine if the final temperature is greater than, less than, or equal to the initial temperature. AU? W? Q? V₂₂ 2V₂Refrigerant 134-a enters the condenser of a heat pump at 800kPa and 35°C at a rate of 0.12kg/s and leaves at 800kPa as a saturated liquid. If the compressor consumes 3.5kW of power, determine: (a) Draw the schematic diagram of the above heat pump (b) the COP of the heat pump (c) the rate of heat absorption from the outside air.