Question:A small fan in a closed insulated roomreleases heat at the rate of 42 watts andpushes the air at the rate of 9 m/s with amass flow rates of 1.2 kg/s. The room hasa heater that produces heat at the rate of0.30 kJ/s as well as a computer thatproduces 65 watts. Light bulbs in theroom produce up to 125 watts. The roomlooses 0.32 kJ/s. Calculate the amount ofheat maintained in the room.

Given:Heat released by fan, Qf=42 wattsheat released by heater, Qh=0.30 KJ/sheat released by…

A small fan in a closed insulated room releases heat at the rate of 42 watts and pushes the air at the rate of 9 m/s with a mass flow rates of 1.2 kg/s. The room has a heater that produces heat at the rate of

A small fan in a closed insulated room releases heat at the rate of 42 watts and pushes the air at the rate of 9 m/s with a mass flow rates of 1.2 kg/s. The room has a heater that produces heat at the rate of

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.8P

See similar textbooks

Related questions

Q: Determine the mean effective pressure of an ideal Otto cycle that uses air as the working fluid if…

Q: The dry-bulb temperature and wet-bulb temperature of a sample of air are 23°C and 18°C,…

Q: A rigid steel bar is supported by three rods as shown. There is no strain in the rods before the…

Q: The signboard truss is designed to support a horizontal wind load of 950 lb. If the resultant of…

Q: V(m/s) Q=2000J ПЛЛЛЛЛ air D=0.1m Tout=? Air at (3.15x10^2) K is entering in a circular pipe at…

Q: he solution clear and

A: p1 = 207 barTsat =368.63°Cp2 = 38.6 barTsat = 244.23°Cp3 = 34.5Tsat = 241.77°Ch1 = 3511.3 kJ/kgh2 =…

Q: Situation 4: A rigid plate of negligible weight rests on the central spring as shown and is loaded…

A: Given: The load acting on central springs, P = 5+2x5+4 = 19 kN The gap between outer springs and…

Q: A four-cylinder, two-stroke 2.4-L diesel engine that operates on an ideal Diesel cycle has a…

Q: Four steel bars jointly support a mass of 25 x 103 kg. Initially the temperature is 250C. Bars A and…

A: h = 800 mm m = 25000 kg T1 = 25 oC T2 = 60 oC Cross-sectional area of A = Cross-sectional Area of D…

Q: A heat pump that provides heat to a house operates on a dry compression cycle and uses R-12 as the…

A: Given Maximum temperature, Tmax = 120oF = 322 K Minimum temperature, Tmin = -60oF = 222 K Find…

Q: PROBLEM 1: A car travels a 10-degree inclined road at a speed of 20 ft/s. The driver then applies…

Q: Neglecting friction, determine the tension in cable ABD and the reac- tion at C when = 60°. B A a- C…

Q: The uniform beam has a mass of 46 kg per meter of length. Determine the reactions at the supports. a

Q: 7. A 33 m beam has two supports. It overhangs each support by 5 m. The beam carries a point load of…

Q: Consider the solution of the following template 1-D wave equation: +c du du dt ах Using a modified…

Q: The signboard truss is designed to support a horizontal wind load of 600 lb. If the resultant of…

Q: A ladder AB leans against a wall for which equilibrium is maintained. Given: Static friction at B,…

Q: 4. 6.3 kg/s of oxygen undergoes a steady flow process. At inlet state, the reduced pressure is 2 and…

A: given; mass(m)=1.3kg/sinitial temperature(Tr1)=1.3exit reduced temperature(Tr2)=1.7Co=0.915Kj/kgk

Q: Determine the forces in members CD, CJ, and DJ. M 11' A L 8' B L 6 panels at 6¹ K C L D L I E L H F…

Q: Problem Description Using a special device, the valve in a pipe line is to be opened and closed. The…

A: To find: The Closing and opening of the valve using an Electro-Pneumatic circuit. Let's find the…

Q: Mach number is defined as the ratio of Select one: O a. Inertia force to pressure force O b. Inertia…

Q: The pressure at the suction of the pump reads 6 psi vacuum, while at the discharge is 35 psi. The…

Q: solve for the COP

Q: 8. Calculate the horizontal reaction at O in Fig Q8 due to the load P = 177 N applied to the bar OB.…

Q: Determine the forces in members BE and CE of the loaded truss. The forces are positive if in…

Q: The normal strain in a suspended bar of material of varying cross section due to its own weight is…

Q: A thin polymer plate PQR is deformed such that corner Q is displaced downward a distance L = 0.10…

Q: The test setup shown in the figure measures the pressure difference between the inlet and outlet of…

Q: Find the Normal force if friction force is 444 N and coefficient of friction is 0.37

Q: For the binary cycle shown, the enthalpies are h1 = 3,195 kJ/kg; h2 = 2,265 kJ/kg; h3 = 178 kJ/kg;…

A: given; hb=288KJ/kghc=112KJ/kgmass flow rate(m)=4.1Kg/s

Q: For Questions 6 and 7 The dry-bulb temperature and wet-bulb temperature of a sample of air are 23°C…

Q: Q=2000J ПЛЛЛЛЛ air V(m/s) D=0.1m Tout=? Air at (3.15x10^2) K is entering in a circular pipe at…

Q: The wall of a building consists of a 360-mm thick layer A which has a thermal conductivity, kA - 4.9…

Q: A steel cable is used to support an elevator cage at the bottom of a 2400-ft-deep mineshaft. A…

A: Given Data: ◆ The uniform normal strain in the cable due to weight of the cage: εuniform = 300…

Q: The nodal diagram shown is of a section of a flat plate with thermal conductivity of 56 W/m K. The…

Q: Inside a 148 mm x 340 mm rectangular duct, air at 26 N/s, 22 deg C, and 108 kPa flows. Solve for the…

A: Given data: T1=22°CA=148 mm x 340 mm=0.05032 m2P=108 kPam˙=26 N/s=269.81 kg/s=2.65 kg/sR = 28.7 m/K…

Q: A thin triangular plate PQR forms a right angle at point Q. During deformation, point Q moves to the…

Q: A shaft is made of an aluminum alloy having an allowable shear stress of Tallow = 94 MPa. if the…

Q: No. of intensive properties needed to define the state of water when at triple point.

A: Given Triple point of water To find Number of intensive properties Triple point is the state where…

Q: At the beginning of the compression process of an air standard Otto cycle, p₁ = 1 bar, T₁ = 300 K.…

A: As per bartleby guidelines we are allowed to solve only 1st 3 subparts if multiple subparts are…

Q: A mass-damper-spring system has the parameters m= 4.5 kg, c = 85 N s/m, k = 1750 N/m. At what…

Q: Find the moment about point A caused by the 380 N force attached at point B on the crane. free body…

Q: Two pulleys which are 270 mm in diameter and which are run at 1030 rpm are connected by a V-belt…

Q: Why is cost a consideration in joint design?

A: The joint design is one major way to control welding cost. If any changes in the design can reduce…

Q: For the system shown, assume m₁ = 1.5m₂ and ₁ = 1.5₂ where it is assumed that m₂ = m and ₂ = . Find…

Q: Determine the force in each member of the loaded truss. Discuss the effects of varying the angle of…

Q: The signboard truss is designed to support a horizontal wind load of 560 lb. If the resultant of…

A: Draw the free-body diagram of the signboard truss.

Q: Supply air at 18°C dry-bulb and RH of 80% flows through a duct whose inside wall temperature is…

Q: A solid cylinder with a diameter of 3.0 cm and length of 3.2 cm, initially at a uniform temperature…

A: Given:d=3 cm =0.03 ml=3.2 cm =0.032mTi=210°CT∞=43°Ch=380W/m2.K

Q: Moist air initially at 101 kPa, 30°C db, 30% relative humidity undergoes a sensible cooling process…

Question

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

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

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

Geothermal heat pumps, or water-source heat pumps, are classified as either _____loop or _____loop systems.
The function of the pressure tank in an open-loop, geo-thermal heat pump well system is to prevent the well pump from _____.
A tank containing 200 kg of water was used as a constant temperature heat bath. How long would it take to heat the bath from 20°C to 25°C with a 250-W immersion heater? Neglect the heat capacity of the tank frane and any heat loss to the air. 3.2 hrs 3.7 hrs 4.6 hrs 4.9 hrs 5.8 hrs
Question 1 A Carnot heat pump is to be used to heat a house and maintain it at 25°C in winter. On a day when the average outdoor temperature remains at about 2°C, the house is estimatedto lose heat at a rate of 55 000 kJ/h. If the heat pump consumes 4.8 kW of power while operating, determine:The COP, heat loss for the day, required work input, how long the heat pump ran on that dayThe total heating costs, assuming an average price of R 2.35/kWh for electricity, andThe heating cost for the same day if resistance heating is used instead of a heat pump
12. A classroom type room with 45students taking an exam in thermodynamics is expected to release a body heat of about 8kJ/hr per person. In order to compensate this heat dissipation, an air- conditioning unit is to be installed. If specific heat capacity and density of air is 1.0062kJ/kg-K and 1.21kg/m3, determine the volume of air flow required in examination room if the air is to be cooled down from 29°C to 20°C. a. 8.5177Li/s b. 9.1262Li/s c. 9.2022Li/s d. 9.0501Li/s
A heat pump uses 100 J of energy as it operates for a given time. Isit possible for the heat pump to deliver more than 100 J of heat tothe inside of the house in this same time? Explain
H6. An air conditioner in an upper-floor apartment unit is turned on during a hot summer afternoon. If heat can be removed from the interior at a rate of 1.5 kW, estimate the time required to cool the air inside the apartment to its final temperature. Your estimate should create any needed input data and should incorporate factors like the size of the apartment and the behavior of air.
A heat pump with a coefficient of performance of 1.8 supplies energy toa house at a rate of 75 MJ h-1. Determine the electrical power used bythe heat pump. answer: 12kJ Please show all working out
A simple saturated refrigeration R-12 system operates at an evaporating temperature of -11 °C and a condensing temperature of 40 °C. Determine the volume flow in m3/sec rate for a refrigerant capacity of 1 kW.
A vacuum refrigeration system consists of a large insulated flash chamber kept at low pressure by steam ejector which pumps vapor to a condenser. Condensate is removed by condensate to an air vent. Warm return water enters the flash chamber at 13oC, chilled water comes out of the flash chamber at 5oC Vapor leaving the flash chamber has a quality of 0.97 and the temperature in the condenser is 32oC. For 350 kw of refrigeration A) How much chilled water at 5oC does this system provide? B) How much make-up water is needed? C) How much vapor must the steam ejector remove from the flash chamber?
Consider the heating of water in a pan on a top of a range. If 24 kJ of heat is transferred to the water from heating element and 6 kJ of it is lost from the water to the surrounding air. Determine;(a) the net heat transfer to the water,(b) the efficiency for boiling water.
A vacuum refrigeration system consists of a large insulated flash chamber kept at low pressure by steam ejector which pumps vapor to a condenser. Condensate is removed by condensate to an air vent. Warm return water enters the flash chamber at 13oC, chilled water comes out of the flash chamber at 5oC Vapor leaving the flash chamber has a quality of 0.97 and the temperature in the condenser is 32oC. For 350 kw of refrigeration How much vapor must the steam ejector remove from the flash chamber?