The refrigerator (R) shown in Fig F3.1i! is a closed syster: thet oper- ates in cycles while in communication with the cold space (T) and the building (TB). The refrigeration load (QL) reaches the cold space by leak- ing from T, to T across the thermal insulation system (I), which is a closed system operating steadily. If the work required by the refrigera- tor is WR, what is the net heat transferred by systems (R) and (I) to the building (TB)? The net heat transferred by (R) and (I) to the building (QB) is removed by a heat pump (HP) that functions cyclically as a closed system. The heat pump requires the work WHp and rejects heat to the ambient of temperature T, which is warmer than the building. Together, the closed systems (R), (I), (B), and (HP) perform the function of removing the refrigeration load Q by rejecting heat to the ambient T- Ta (В) QB TB (HP) EWHP WR (R) (1) TL

The refrigerator (R) shown in Fig F3.1i! is a closed syster: thet oper- ates in cycles while in communication with the cold space (T) and the building (TB). The refrigeration load (QL) reaches the cold space by leak- ing from T, to T across the thermal insulation system (I), which is a closed system operating steadily. If the work required by the refrigera- tor is WR, what is the net heat transferred by systems (R) and (I) to the building (TB)? The net heat transferred by (R) and (I) to the building (QB) is removed by a heat pump (HP) that functions cyclically as a closed system. The heat pump requires the work WHp and rejects heat to the ambient of temperature T, which is warmer than the building. Together, the closed systems (R), (I), (B), and (HP) perform the function of removing the refrigeration load Q by rejecting heat to the ambient T- Ta (В) QB TB (HP) EWHP WR (R) (1) TL

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: 54. A 5.0-kg box has an acceleration of 2.0 m/s when it is pulled by a horizontal force across a…

Q: a) A heat engine operates at a 40% efficiency. The heat input is 20,000 J. How much work does this…

Q: A compressor is used to increase air pressure with the assumption that there is no heat transfer…

Q: Evaluate whether this refrigerator is possible. The inside temperature is -10degC in the icebox. The…

A: Given Data TH=25°C=298 K Tc=-10°C=263 K COP=7.5

Q: Q2. SO parts A reversed reversible heat engine extracts heat 01-22 from a cold reservoir at…

A: “Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: Q3: The sensible cooling load of the air conditioner space is 100 kW and latent load is 20 kW.…

Q: Re(Local)=5.05*10^6. Use Example 2B.2 as reference. Find out the total convective heat transfer rate…

A: Given that, Circuit board geometry: -L=0.15 m, W=0.15 m,Convective heat flux to air, q''=890…

Q: A block of mass m = 5 Kg is attached to a spring of spring constant k. The block oscillates in…

Q: Do fast

Q: 4. Shaft work of 25 kJ/kg and heat transfer of - 15 kJ/kg, the change of enthalpy of the system is:…

Q: The energy required to heat a 50m^2 living area in Canberra is of 18738 MJ per year. Assume the…

A: To Find : a) The annual cost of heating the living area with the three systems above.b)The two heat…

Q: anged in series and their System would be

Question

.11 The refrigerator (R) shown in Fig. F3.i! is a closed syster: thet oper-
ates in cycles while in communication with the cold space (T;) and the
building (T). The refrigeration load (QL) reaches the cold space by leak-
ing from T to T across the thermal insulation system (I), which is a
closed system operating steadily. If the work required by the refrigera-
tor is WR, what is the net heat transferred by systems (R) and (I) to the
building (Tg)?
The net heat transferred by (R) and (I) to the building (QR) is
removed by a heat pump (HP) that functions cyclically as a closed
system. The heat pump requires the work WHp and rejects heat to the
ambient of temperature T, which is warmer than the building. Together,
the closed systems (R), (I), (B), and (HP) perform the function of
removing the refrigeration load Q, by rejecting heat to the ambient T.
T
(В)
Тв
(HP)
E WHP
WR
(R)
(I)
TL
Te,
Figure P3.11
38
ENTROPY GENERATION, OR EXERGY DESTRUCTION
The total work requirement is WR + WHP, and the overall coefficient of
performance is
СОР %3
WR + WHP
Write the formulas for the coefficients of performance of the refriger-
ator (COPR) and the heat pump (COPHP) and determine the relationship
COP = function(COPR, COPHP).
Consider the limit where (R) and (HP) operate reversibly, express
COPR and COPHP in terms of (TB, T) and (Ta, TB), respectively, and
finally express the overall COP as COP ey = function(T, Tg, TL). On
a summer day, the following temperatures are measured: T = 310 K,
TR = 300 K, and T, = 275 K. Calculate COPrey:

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

3.3 Would it be possible to use a normal domestic refrigerator as a heat source for a small hot tub or whirlpool? If so, what would you estimate to be the maximum heating rate and temperature that a 300 gal whirlpool could reach using a refrigerator that is sized to use a 1 hp electric compressor designed with an evaporator temperature of 10 ° F and condensing temperature of 125 ° F?
3. A hydraulic lift is shown below. The combined mass of the piston, rack, and car is 4000 lbm. The working fluid is water. There is no heat transfer to or from the water, and the internal energy of the water per unit mass is constant. The water may be considered incompressible. (a) Taking all the water in the reservoir, line, and hydraulic cylinder as the system (i.e., taking the closed-system approach), calculate the work necessary to raise the rack and car 1 ft (neglect the change in potential energy of the water in the system). (b) Repeat part (a), taking all the water plus the car and the rack as the system. (c) Repeat part (a), taking an open-system approach; choose as your system the volume of the hydraulic cylinder, excluding the piston, rack, and car. If the absolute pressure in the system is 1000 lbf/in², calculate the volume that must flow in to raise the car 1 ft. Reservoir Pump Hydraulic cylinder
Dont ignore solve for me All ok take ur time
Thermodynamics I
Solve fast. Expert pls.
Refrigerators to preserve perishable foods have long been one of the essential appliances in a household. The refrigeration system of the household refrigerator is basically based on the vapor-compression refrigeration cycle, as shown in Figure Q2.1. Among the important components of the vapor-compressions refrigeration cycle are a throttling valve (A) and a compressor (B). In this refrigeration system, tetrafluoroethane (R-134a) is used as the refrigerant. Condenser W B A Evaporator Figure Q2.1: Basic components of a refrigeration system. (a) If the refrigerant enters A as a saturated liquid at 1100 kPa and leaves at 120 kPa, (i) Estimate the quality of the refrigerant at the exit of A. (ii) Calculate the temperature drop during the process. (iii)With appropriate assumptions, prove that the conservation of energy for A as follows the equation below, h= h2 (b) If the refrigerant enters B as a saturated vapor at 120 kPa with flow rate of 1.5 m³/min and leaves at 1100 kPa, (i) Calculate…
In the following problem, consider the human body as a heat engine with efficiency e = 0.2 that can take in energy as food Qh, perform work W, and generate heat Qc. This heat expelled from our muscles (Qc) is an important component of maintaining a constant body temperature, which necessitates a balance of energy intake and output. In order to calculate the energy intake Qh, you will use the table above listing activity factors for selected activities, for a person with a BMR of 1440 kcal/day. For example, the energy required to stand per hour would be (fstand)(BMR) = (1.7)(1440 kcal/day) (1day/24 hours) = 102 kcal/h. For each scenario, calculate the 24 h number of bowls of cereal that must be consumed per hour (1 bowl = 100 kcal) to perform the required activity (Qh) Determine whether you have an energy deficit or surplus by considering the heat generated by your muscles (Qc), the heat loss from conduction, and the heat loss/gain from radiation We will consider heat loss from…
Q- mechanics, A fan consumes 50 W of electric power and has an air discharge of 0.25 kg/s, find the maximum air outlet velocity in this case.
An inventor comes to you saying he has invented a refrigerator that maintains a room at 20F while operating in a location at 80F with a coefficient of performance of 8.5, is this possible?
Q1/ A / A frictionless piston cylinder arrangement containing fluid 200 kJ of heat is transferred and the fluid internal energy reduces by 50kJ, how much is the boundary work done?