HEATING, VENTILATING,+AC ANAL...EBOOK>I<
6th Edition
ISBN: 2819480255750
Author: Mcquiston
Publisher: INTER WILE
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 3, Problem 3.8P
A room is to be maintained at 72 F (22 C) db. It is estimated that the inside wall surface temperature could be as low as 48 F (9 C). What maximum relative and specific humidities can be maintained without condensation on the walls?
Expert Solution & Answer
![Check Mark](/static/check-mark.png)
Want to see the full answer?
Check out a sample textbook solution![Blurred answer](/static/blurred-answer.jpg)
Students have asked these similar questions
Calculate (a) the humidity of air at a temperature of 65 deg C and 42% RH, and (b) compare the value from the Psychrometric Chart.
Air at 90°C and 1.00 atm (absolute) contains 10.0 mole% water. A continuous stream of this air
enters a compressor-condenser, in which the temperature is lowered to 15.6°C and the pressure is
raised to 3.00 atm. The air leaving the condenser is then heated isobarically to 100°C.
Calculate:
(a) the fraction of water that is condensed from the air
(b) the relative humidity of the air at 100°C
(c) and the ratio of the volumetric flow of the outlet air to the volumetric flow of the feed
air.
what is the reason that someone can feel comfortable in a room that consists of 20oC drybulb temperature and a wet bulb temperature of 15oC ? explain with some calculation if possible
(a detailed answer will be appreciated )
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
What parts are included in the vehicle chassis?
Automotive Technology: Principles, Diagnosis, and Service (5th Edition)
If the rod is smooth, determine the power developed by the force at the instant = 60.
Engineering Mechanics: Dynamics (14th Edition)
4.46 A 12-ft-long weightiness member supports two loads, as shown. The member is held horizontal by two flexibl...
Applied Statics and Strength of Materials (6th Edition)
Use Mohrs circle to determine the normal stress and shear stress acting on the inclined plane AB.
Statics and Mechanics of Materials (5th Edition)
The belt passing over the pulley is subjected to forces F1 and F2, each having a magnitude of 40 N. F1 acts in ...
Engineering Mechanics: Statics
What are the attractive properties of hard chrome plate?
Degarmo's Materials And Processes In Manufacturing
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
- During humidification process at 31 oC-17 DBT. The minimum wet bulb temperature is اختر احد الخيارات a. O oC b. 12 oC с. 10 оС d. 31 oCarrow_forwardA poultry house in Mogobane, is made of 100mm fired clay bricks. In winter, the inside air temperature is 24°C and the relative humidity is 75%. The outside temperature is at 1°C and the relative humidity is 25%. Determine whether condensation will occur within this wall. If there is condensation, suggest mitigating measures and show that indeed the measures will work.arrow_forward3. Why dry air and water vapor during calculating the properties of moist air are treated separately, explain.arrow_forward
- Air at 0° C and 95% relative humidity has to be heated and humidified to 25° C and 40% relative humidity by the following three processes: (a) preheating; (b) adiabatic saturation in a recirculated water air-washer; and (c) reheating to final state. Calculate: 1. The heating required in two heaters; 2. The makeup water required in washer and temperature of washer. Assume effectiveness of washer as 80 per centarrow_forwardExplain the processes of adiabatic cooling and heating.arrow_forwardThe process of oxidizing air in a humidifier, air at a dry bulb temperature of 25 degrees Celsius and RH 10% increases the RH to 45%. Determine the amount of moisture added to the humidifier per kg of dry air. = (kg of water / kg of air)arrow_forward
- Air at 90°C and 1.00 atm (absolute) contains 10.0mole% water. A continuous stream of this air enters a compressor—condenser, in which the temperature is lowered to 15.6°C and the pressure, is raised to 3.00 atm. The air leaving the condenser is then heated isobarically to 100°C. Calculate the fraction of water that is condensed from the air, the relative humidity of the air at 100°C, and the ratio m3 outlet air at 100°C/m3 feed air at 90°C. Make a detailed flowchart with the unknowns and solve the degree of freedomarrow_forwardUsing a psychrometric diagram, describe the heating and humidification process from the following data. Initially the air is heated at dry bulb temperature (DBT) 40 ° C and RH 55%. The air is heated to DBT 90 ° C. The heated air is then flowed through a humidifier to increase the RH to 25%. For this process, calculate a. change in absolute humidity of air from initial to final conditions = kg water / kg air b. change in enthalpy of air from initial to final conditions = kj / kg airarrow_forwardRead the question carefully and give me right solution according to the question. One m3/s of air at 12°C and 50% RH is heated and humidified using saturated steam at 100 °C to a final state of 38°C and 50% relative humidity. Sketch the process on the psychrometric chart and calculate the following: (a) Mass flow rate (b) Steam flow rate needed (c) Heating coil capacityarrow_forward
- A space is to be maintained at 22C and 50% relative humidity. The sensible heat load is 100 kW, and the latent heat load is 15 kW. Outside air is at 38C DB and 25C WB temp. Air is supplied to the space at 13C. If all-outside air system (no recirculation) is to be implemented, determine: (a) the cooling capacity in tons; (b) capacity of supply air fan in cmh; and (c) the coil bypass factor.arrow_forwardIn an attempt to conserve water and to be awarded LEED (Leadership in Energy and Environmental Design) certification, a 20,000-liter cistern has been installed during construction of a new building. The cistern collects water from an HVAC (heating, ventilation, and air-conditioning) system designed to provide 2830 cubic meters of air per minute at 22°C and 50% relative humidity after converting it from ambient conditions (31°C, 70% relative humidity). The collected condensate serves as the source of water for lawn maintenance. Estimate (a) the rate of intake of air at ambient conditions in cubic feet per minute and (b) the hours of operation required to fill the cistern.arrow_forwardDuring wintertime, the inside surface temperature of a glass door is 5°C where the air has a temperature of 22°C Dry Bulb, 20 percent relative humidity, and a pressure of 101.325 kPa pressure. Perform hand calculation using steam table to evaluate the enthalpy of air in this stage. Will moisture condense on the glass door? Psychrometric chart is not required.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
![Text book image](https://www.bartleby.com/isbn_cover_images/9780190698614/9780190698614_smallCoverImage.gif)
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
![Text book image](https://www.bartleby.com/isbn_cover_images/9780134319650/9780134319650_smallCoverImage.gif)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
![Text book image](https://www.bartleby.com/isbn_cover_images/9781259822674/9781259822674_smallCoverImage.gif)
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
![Text book image](https://www.bartleby.com/isbn_cover_images/9781118170519/9781118170519_smallCoverImage.gif)
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337093347/9781337093347_smallCoverImage.gif)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
![Text book image](https://www.bartleby.com/isbn_cover_images/9781118807330/9781118807330_smallCoverImage.gif)
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Heat Transfer – Conduction, Convection and Radiation; Author: NG Science;https://www.youtube.com/watch?v=Me60Ti0E_rY;License: Standard youtube license