Losses by Natural Convection from a Cylinder. A vertical cylinder 76.2 mm in diameter and 121.9 mm high is maintained at 397.1 K at its surface. It loses heat by natural convection to air at 294.3 K. Heat is lost from the cylindrical side and the flat circular end at the top. Calculate the heat loss neglecting radiation losses. Use the simplified equations of Table 4.7-2 and those equations for the lowest range of NG, NP.. The equivalent L to use for the top flat surface is 0.9 times the diameter. Gr Ans. 9 = 26.0 W

Q: Air cools the top and bottom of an electronic chip that uniformly generates heat. At steady-state,…

A: It is given that air cools the top and bottom of the electronic chip. The chip is subjected to…

Q: A 0.20 m thick brick wall (k = 1.3 W/m•K) separates the combustion zone of a furnace from its…

A: Given data: Thickness of brick wall = 0.2 m Thermal conductivity of the wall = 1.3 w/m∙K Temperature…

Q: 6) Problem 4.7-6 (Page 350): Natural Convection Heat Loss in Double Window. 4.7-6. Natural…

A: Given that T1 =25 CT2 =10 Ch=2 mw=1.2 m Ra

Q: Unit of convection heat transfer coefficient is, 1. W/m2k 2. W/mk 3. j/mk 4. None of the above

A: Heat transfer coefficent is defined as the proportionality constant between the heat flux and the…

Q: 30°C

A:

Q: For a stream of water (at 32 °C) flowing over a plate at a constant surface temperature of (90 °C)…

A: Given:  T∞ = Twater = 32 oC            Thermal conductivity of water at 32 oC = 0.6 W/m.k…

Q: Water flows at 50°C inside a 2.5-cm-inside-diameter tube such that hi = 3500 W/m2.°C. The tube has a…

A:

Q: A long cylindrical rod of diamcter 200 mm with thermal conductivity of 0.5 W/m-K experiences uniform…

A:

Q: 7-2, Losses by Natural Convection from a Cylinder. A vertical cylinder 76.2 mm in diameter and 121.9…

A: The radiation heat loss is neglected. The mean of the given two temperatures will be the film…

Q: A circumferential fin of rectangular profile has a thickness of 0.7 mm and is installed on a tube…

A: Assumptions- Thickness = y Convective heat transfer coefficient = h Thermal conductivity of fin…

Q: Steam at 140 ° C flows in a pipe having an inner radius of 45 mm and an outer radius of 55 mm. The…

A: The rate of heat transfer through a pipe is calculated as, Q=Ti-To1Aihi+ln(ro/ri)2πkwL+1Aoho Where,…

Q: A petrochemical storage tank is cylindrical in shape with a diameter of 6 m and a height of 10 m.…

A: Calculate the characteristic length of the cylinder as shown below:

Q: A stainless steel spherical tank, with an inner diameter of 3 m and a wall thickness of 10 mm, is…

A: Consider the following properties of air at 30°C and  1ATM  pressure from   of the text book.…

Q: An enclosure has a heated bottom plate at T1 = 80 celsius. The top plate is kept at T2 = 35 celsius…

A: Given data; T1=80 °CT2=35°CTm=80+352     = 57.5°CorTm=330.5 K

Q: A certain matenial 2.5 em thick, with a cross-sectional area of 0.1 m, has one side maintained at…

A: Given, T3=95oC,T2=62oC,T1=35oC,∆x=0.025 m Assume Linear variation of thermal conductivity,…

Q: For the plane wall shown, solve the conduction equation, deriving an algebraic expression for the…

A: Conduction is a simple heat transfer process in which heat transfers from one end to another end of…

Q: Air is located between two flat surfaces placed a distance 2b = 20 cm apart. The heated plate at y =…

A: To find:The general temperature and velocity distribution equations for the system and the…

Q: Heat is negative when when transferred from the system to the surroundings True False

A: Heat: It is a form of energy which transfers from hotter body to colder body by thermal radiation.…

Q: Q4) Consider a 20-cm-thick large concrete plane wall (k = 27°C and h1 = 5 W/m². 12 W/m² °C on the…

A: Given Data The thickness of concrete = 20 cm = 0.2 m Thermal Conductivity of concrete (k) = 0.77…

Q: Question 1 Hot oil flows through a steel tube with an outer diameter of 6 cm. The walls of the tube…

A:

Q: The heat transfer rate from hot air by convection at 100°C flowing over one side of a flat plate…

A: This problem involves the heat transfer by convection over a flat plate. The dimensions given are =…

Q: When a steel cookie sheet is placed in an oven and heated, it expands due the temperature change.…

A: Given data: The change in the area of the cookie sheet is modeled by the following equation: