HEATING, VENTILATING,+AC ANAL...EBOOK>I<
6th Edition
ISBN: 2819480255750
Author: Mcquiston
Publisher: INTER WILE
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Chapter 5, Problem 5.37P
A building has floor plan dimensions of
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* It required to design a ducting system to condition the building shown in figure (1). The
uantity of outdoor is (20%) of supply air. Using information in table, find
1- The sensible and latent load for cooling coil.
2- The quantity and condition of supply air to each place.
3- By using equal pressure drop method, design the rectangular ducting system with
maximum height side (600mm).
4- Illustrate the all process on psychometric chart.
Outdoor
45 °C db & 30% RH
Out let type
Celling
conditioning
indoor conditioning 24 °C db & 50% RH
diffuser
Number of diffuser
2 for each
place
15 kpa
10 kpa
15 kpa
By pass factor
Apparatus dew point 9°C
Ap losses diffuser
Ap losses filter
Ap losses coil
0.15
R/w
1.5
бm
бm
бm
Room (1)
Room (2)
RSH=6KW
Room (3)
4m
RSH=8KW
RSH=8KW
RLH=2KW
RLH=1KW
RLH=2KW
2m
AHU
Mechanical
Room (4)
RSH=20KW
4m
Room
RLH=3KW
4m
14m
* It required to design a ducting system to condition the building shown in figure (1). The
uantity of outdoor is (20%) of supply air. Using information in table, find
1- The sensible and latent load for cooling coil.
2- The quantity and condition of supply air to each place.
3- By using equal pressure drop method, design the rectangular ducting system with
maximum height side (600mm).
4- Illustrate the all process on psychometric chart.
Outdoor
45 °C db & 30% RH
Out let type
Celling
conditioning
indoor conditioning 24 °C db & 50% RH
diffuser
Number of diffuser
2 for each
place
15 kpa
10 kpa
15 kpa
By pass factor
Apparatus dew point 9°C
Ap losses diffuser
Ap losses filter
Ap losses coil
0.15
R/w
1.5
6m
6m
6m
Room (1)
Room (2)
Room (3)
4m
RSH=8KW
RSH=6KW
RSH=8KW
RLH=2KW
RLH=1KW
RLH=2KW
2m
AHU
Mechanical
Room (4)
RSH=20KW
4m
Room
RLH=3KW
4m
14m
1. If the thermal conductivity increase the heat transfer coefficient will
2.The rate of evaporation at a given operation in an evaporator is more when
a.there is a vacuum
b.the operating pressure is high
c.when the feed flowrate is high
d.the operating pressure is low
3.In fluid, if the currents are set in motion by the action of mechanical device, the flow is independent of density gradient, the phenomenon is called
a.heatexchanger behavior
b.natural convection
C.forced convection
d.thermal conduction
Chapter 5 Solutions
HEATING, VENTILATING,+AC ANAL...EBOOK>I<
Ch. 5 - Determine the thermal conductivity of 4 in. (100...Ch. 5 - Compute the unit conductance C for 512 in. (140...Ch. 5 - Compute the unit thermal resistance and the...Ch. 5 - What is the unit thermal resistance for an inside...Ch. 5 - Compute the thermal resistance per unit length for...Ch. 5 - Assuming that the blocks are not filled, compute...Ch. 5 - The partition of Problem 5-4 has still air on one...Ch. 5 - The pipe of Problem has water flowing inside with...Ch. 5 - Compute the overall thermal resistance of a wall...Ch. 5 - Compute the overall heat-transfer coefficient for...
Ch. 5 - Estimate what fraction of the heat transfer for a...Ch. 5 - Make a table similar to Table 5-4a showing...Ch. 5 - Estimate the unit thermal resistance for a...Ch. 5 - Refer to Problem 5-13, and estimate the unit...Ch. 5 - A ceiling space is formed by a large flat roof and...Ch. 5 - A wall is 20 ft (6.1 m) wide and 8 ft (2.4 m) high...Ch. 5 - Estimate the heat-transfer rate per square foot...Ch. 5 - A wall exactly like the one described in Table...Ch. 5 - Prob. 5.19PCh. 5 - Compute the overall heat-transfer coefficient for...Ch. 5 - Compute the overall heat transfer for a single...Ch. 5 - Determine the overall heattransfer coefficient for...Ch. 5 - A basement is 2020ft(66m) and 7 ft (2.13 m) below...Ch. 5 - Estimate the overall heat-transfer coefficient for...Ch. 5 - Rework Problem 5-23 assuming that the walls are...Ch. 5 - A heated building is built on a concrete slab with...Ch. 5 - A basement wall extends 6 ft (1.8 m) below grade...Ch. 5 - A 2440ft(7.312.2m) building has a full basement...Ch. 5 - The floor of the basement described in Problem...Ch. 5 - Assume that the ground temperature tg is 40 F (10...Ch. 5 - Use the temperatures given in Problem 5-30 and...Ch. 5 - A small office building is constructed with a...Ch. 5 - A 100 ft length of buried, uninsulated steel pipe...Ch. 5 - Estimate the heat loss from 100 m of buried...Ch. 5 - A large beverage cooler resembles a small building...Ch. 5 - Consider the wall section shown in Fig. 5-10. (a)...Ch. 5 - A building has floor plan dimensions of 3060ft....Ch. 5 - Compute the temperature of the metal roof deck of...Ch. 5 - Consider the wall section shown in Fig. -4a,...Ch. 5 - Consider the knee space shown in Fig. 5-11. The...Ch. 5 - Estimate the temperature in an unheated basement...
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- the compression ratio is given. answer what is the cut off ratio, thermal efficiency, and mean efffective pressurearrow_forwardQUESTION 3 A manufacturer conducted an experiment for an evaporator capacity 500 kW cooling and designed for high COP of 2 when using lithium bromide plus water in an absorption refrigeration system. The evaporator operates 20 C, condenser 40 C & absorber 45 C supplying 1.4 kg/s of water plus lithium bromide solution to the generator. For a condenser size of 650 kW, determine: Show in your solution paper: Chart reading for Concentration and Enthalphy of solution being pumped Provide in the Answer Box: Enthalpy of solution being pumped in kJ/kgarrow_forwardA highly engineered Ecto-Containment System Protection Grid produces about 8 kW of waste heat in thesystem. A less highly-engineered tubular cross-flow heatsink is designed to dissipate that heat. In this case, the heat sink is a single long pipe carrying anti-freeze through the unit. The pipe has an OD of 80mm and and ID of 16mm. Assume that there is no resistance between the anti-freeze and the OD of the pipe (infinite conduction). Convection is forced, with an airflow of 12 m/s air across it Pr,air = 0.72, density(p) = 1.2 kg/m3, u = 16.83x10−6 Pa − S, k = 0.025 W/mk). The outside air is at 25℃ while the antifreeze is at 180℃. a) Find the Reynold’s Number of flow over the Pipe b) Find the convection coefficient across the pipe c) How long must the pipe be to dissipate all 8kW?arrow_forward
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