HEATING, VENTILATING,+AC ANAL...EBOOK>I<
6th Edition
ISBN: 2819480255750
Author: Mcquiston
Publisher: INTER WILE
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 3, Problem 3.38P
The system of Problem 3-34 has a supply air fan located just downstream of the cooling coil. The total power input to the fan is 4.0 hp. It is also estimated that heat gain to the supply duct system is 1000 Btu/hr. Rework Problem 3-34 using Chart la, taking the fan and duct heat gain into account. Make a sketch of the processes.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
* 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
* 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
6. A Thomas meter is located in an air duct of 2 sq ft cross-sectional area.
The air weighs 0.083 lb per cu ft, and its specific heat is 0.24. Assume
a controlled temperature differential of 5° and heater potential of 110
volts. Plot the velocity as abscissa and amperage as ordinate for veloc-
ity 0 to 300 ft per min. Assume constant amperage of 3, and plot tem-
perature difference against velocity. Discuss the curves from the stand-
point of accuracy of the system.
J: よ
itet
legeted
oulindriool oir tube
Chapter 3 Solutions
HEATING, VENTILATING,+AC ANAL...EBOOK>I<
Ch. 3 - A space is at a temperature of 75 F (24 C), and...Ch. 3 - Determine the humidity ratio, enthalpy, and...Ch. 3 - Suppose the air of Problem 3-2 is at a pressure...Ch. 3 - What is the enthalpy of moist air at 70 F (20 C)...Ch. 3 - The inside surface temperature of a window in a...Ch. 3 - What is the mass flow rate of dry air flowing at a...Ch. 3 - Determine the dew point of moist air at 80 F (27...Ch. 3 - A room is to be maintained at 72 F (22 C) db. It...Ch. 3 - Air is cooled from 80 F db and 67 F wb until it is...Ch. 3 - Conditions in a room are measured to be 80 F db...
Ch. 3 - The environmental conditions in a room are to be...Ch. 3 - Air enters a cooling coil at the rate of 5000 cfm...Ch. 3 - Air flowing in a duct has dry and wet bulb...Ch. 3 - Air is humidified with the dry bulb temperature...Ch. 3 - Air at 38 C db and 20 C wb is humidified...Ch. 3 - Two thousand cfm (1.0 m3/s) of air at an initial...Ch. 3 - Air at 40 F (5 C) db and 35 F (2 C) wb is mixed...Ch. 3 - Rework Problem 3-25, using Chart 1a, with the...Ch. 3 - The design cooling load for a zone in a building...Ch. 3 - Assume that the air in Problem 3-22 is supplied to...Ch. 3 - The sensible heat loss from a space is 500,000...Ch. 3 - Air enters a refrigeration coil at 90 Fdb and 75...Ch. 3 - A building has a total heating load of 200,000...Ch. 3 - Reconsider Problem 3-36 for an elevation of 5000...Ch. 3 - The system of Problem 3-34 has a supply air fan...Ch. 3 - An evaporative cooling system is to be used to...Ch. 3 - A cooling system is being designed for use at high...Ch. 3 - Consider a space heating system designed as shown...Ch. 3 - A variable-air-volume VAV cooling system is a type...Ch. 3 - Rework Problem 3-43 for an elevation of 5000 feet...Ch. 3 - The design condition for a space is 77 F (25 C) db...Ch. 3 - Rework Problem 3-45 for an elevation of 5000 feet...Ch. 3 - It is necessary to cool and dehumidify air from 80...Ch. 3 - Conditions in one zone of a dual-duct conditioning...Ch. 3 - Rework Problem 3-48 for an elevation of 5000 ft...Ch. 3 - A water coil in Problem 3-48 cools return air to...Ch. 3 - A multizone air handler provides air to several...Ch. 3 - Under normal operating conditions a zone has a...Ch. 3 - An interior zone of a large building is designed...Ch. 3 - Outdoor air is mixed with room return air to...Ch. 3 - Consider an enclosed swimming pool. The pool area...Ch. 3 - One particular zone served by a multizone air...Ch. 3 - A research building requires 100 percent outdoor...Ch. 3 - A space requires cooling in the amount of 120,000...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
Steady state conduction rate to the warm compressor to the net power produces theoretically by thermodynamic ba...
Introduction to Heat Transfer
Consider a subsonic compressible flow in cartesian coordinates where the velocity potential is given by (x,y)=V...
Fundamentals of Aerodynamics
Locate the centroid of the area. Prob. 9-17
INTERNATIONAL EDITION---Engineering Mechanics: Statics, 14th edition (SI unit)
Comprehension Check 7-14
The power absorbed by a resistor can be given by P = I2R, where P is power in units of...
Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
For the beam loading of Figure P334, draw the complete shearing force and bending moment diagrams, and determin...
Machine Elements in Mechanical Design (6th Edition) (What's New in Trades & Technology)
A pipe flowing light oil has a manometer attached, as shown in Fig, P1.52. What is the absolute pressure in pip...
Fundamentals Of Thermodynamics
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
- If 14 gpm of water is flowing through an open-loop heatpump with a temperature difference of 78F, how muchheat in Btu/h is being absorbed or rejected in the heatpump? Show all work and units.arrow_forwardPlease answer questions g, h, and i. g.Calculate the heat transferred in the condenser. h.Calculate the diameter of the pipe connecting the turbine to the condenser. Design data for the plant shows the following pipe diameters. i. Calculatecooling water flow rate in GPM (‘gallons per minute’)through the condenser if the temperature of the cooling water increases from 13 C to 24 C in the condenser.arrow_forward17) What is the approximate Peritectic Temperature for the system?arrow_forward
- A compressor that has been in service for 20 years has finally broken down beyond repair, and now must be replaced. The old 180hp machine cost $1200 and its cost index at that time was 144.5. The new machine will be 400hp. How much will the new machine cost, given that today's compressor index is 252.4 and the power-sizing exponent for compressor sizing is 0.32? A: $929 B: $2706 C: $1434 D: $2096 E: $1549arrow_forwardPlease help with problem number 2arrow_forward• A 6 MW generator had a thrust of 103,000 lb. The outside diameter of the step bearing is 12 in, and the inside diameter is 8 in. Employ a film thickness of 0.004 in. Use SAE 20 oil at 120 , the specific heat of the oil being 0.6 BTU/lb deg F, and density of 0.307 lb/cu. in Determine: (d) Temperature risearrow_forward
- Drive the 3 equations mentioned above?How??arrow_forwardA Thomas meter is located in an air duct of 2 sq ft cross-sectional area. The air weighs 0.083 lb per cu ft, and its specific heat is 0.24. Assume a controlled temperature differential of 5° and heater potential of 110 volts. Plot the velocity as abscissa and amperage as ordinate for veloc- ity 0 to 300 ft per min. Assume constant amperage of 3, and plot tem- perature difference against velocity. Discuss the curves from the stand- point of accuracy of the system.arrow_forwardNo. 3 question: A diesel engine powers a boat. The engine’s cylinders each have a cut-offratio(V3/V2) of 2 and the V3is 4ft3. If 1 cylinder is in the isobaric expansionstroke, find the final temperature if the initial temperature is 540F Main question: From number 3, if the gas tankaccident happened on top of Mt. Everest’s summit where patm is only 33.7 kpaand the readings obtained are the same, find the new final temperaturearrow_forward
- Can you help me solve this? Figure below shows a steam jet refrigeration system that produces chilled water in a flash chamber. The chamber is maintained at a pressure by the steam ejector, which removes the vapor generated by entraining it in the low-pressure jet and discharging into the condenser. The vacuum pump removes air and other non-condensable gases from the condenser shell. For the conditions shown on the figure, determine the make-up water and cooling water flow rates in kg/hr.arrow_forwardFigure below shows a steam jet refrigeration system that produces chilled water in a flash chamber. The chamber is maintained at a pressure by the steam ejector, which removes the vapor generated by entraining it in the low-pressure jet and discharging into the condenser. The vacuum pump removes air and other non-condensable gases from the condenser shell. For the conditions shown on the figure, determine the make-up water and cooling water flow rates in kg/hr. Show diagrams if there are anyarrow_forwardFigure below shows a steam jet refrigeration system that produces chilled water in a flash chamber. The chamber is maintained at a pressure by the steam ejector, which removes the vapor generated by entraining it in the low-pressure jet and discharging into the condenser. The vacuum pump removes air and other non-condensable gases from the condenser shell. For the conditions shown on the figure, determine the make-up water and cooling water flow rates in kg/hr. SHOW THE NEEDED DIAGRAMS FOR THE SOLUTIONarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Refrigeration and Air Conditioning Technology (Mi...Mechanical EngineeringISBN:9781305578296Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill JohnsonPublisher:Cengage Learning
Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning
Refrigeration and Air Conditioning Technology (Mi...
Mechanical Engineering
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:Cengage Learning
Principles of Heat Transfer (Activate Learning wi...
Mechanical Engineering
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Cengage Learning
The Refrigeration Cycle Explained - The Four Major Components; Author: HVAC Know It All;https://www.youtube.com/watch?v=zfciSvOZDUY;License: Standard YouTube License, CC-BY