The water vapor pressure of ambient air is 19 mmHg, and the wind speed is 1.7 m/s. Calculate the maximum evaporative heat loss (Emax in watts). (Assume skin temperature is 35°C; vapor pressure at 35°C is 42 mmHg., and a standard worker)

The water vapor pressure of ambient air is 19 mmHg, and the wind speed is 1.7 m/s. Calculate the maximum evaporative heat loss (Emax in watts). (Assume skin temperature is 35°C; vapor pressure at 35°C is 42 mmHg., and a standard worker)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: Humid air at atmospheric pressure has a dry bulb temperature T_db=15℃ and a wet bulb temperature…

A: Humid air at atmospheric pressure Tdb =15°C, Relative humidity= 70% To find - Add the point on the…

Q: A new temperature scale, °W is desired with freezing of water at 24°W and boiling point…

Q: Air with a density of 10 g/m^3 is 100% saturated at 12 C. At what temperature will it reach its dew…

A: Given: Air is saturated 100% at 12 degree centigrade. So here dry bulb point temperature is:…

Q: A sample of air has a dry-bulb temperature of 32°C and a relative humidity of 60%. The pressure is…

A: Given data Dry bulb temperature = tdb = 32°C Relative humidity = ϕ = 60% Atmospheric pressure =…

Q: 1. In your own words, define the quality and explain if it has a meaning in the superheated region…

A: In a temperature enthalpy diagram of water, there is dome shaped curve whose left side region is…

Q: There is 7 kg of air in a closed container with a fixed volume at a temperature of 25 C and a…

Q: The process of oxidizing air in a humidifier, air at a dry bulb temperature of 25 degrees Celsius…

Q: Classify whether the properties given is for subcooled liquid (SC), saturated liquid (SL), wet…

A: Solution: The given states have been categorized by looking into the steam tables:

Q: What is the phase and pressure of water at 280°C with specific volume 0.92 m3/kg? answer :…

Q: Question The condition of air in a restaurant kitchen is defined based on the Tab of 23°C and…

A: Dry bulb temperatureRelative humidityAt this condition from the psychrometric chart:Wet bulb…

Q: Design a hydrocooling unit to cool down fruits and vegetables from 30 °C to 5 °C in 20 minutes at a…

A: Assuming specific heat of fruits Cf= 3.65 KJ/Kg mass flow rate of fruits= mf= 20000 Kg/h = 5.55 kg/s…

Q: Calculate the partial pressure of oxygen in the air at 100 kPa if nitrogen has a partial pressure…

A: Given Data- Air pressure =100KPa nitrogen partial pressure = 82 kPa carbon dioxide and water…

Q: A room has dimensions of approximately 10m x 10m x 3m. Assume the air inside the room is initial at…

A: Given: Dimensions of the room = 10 x 10 x 3 mInitial temperature of air Ti = 20°C Pressure P = 100…

Q: If 120 kg of air has a dry bulb temperature of 18 deg C. What is the standard air volume in m3?

A: The pressure corresponding to dry bulb temperature is the saturation pressure which is derived from…

Q: An air conditioning unit is shown in figure 1, where air enters from left to right. The initial…

Q: Calculate the relative humidity if the specific humidity is 5g/kg and the capacity of the air…

Q: Refrigeration and Air-Conditioning, 2008, CP Arora Problem 14.2 14.2 A sample of moist air has a dry…

A: As per the Bartleby code of conduct, it is recommended to solve only the first three sub-parts of a…

Q: A moist air is at a temperature of 21 deg.C (Psat = 2.4861 kPa) under a pressure of 75 kPa. The dew…

A: Given: The temperature of the moist air, T = 21 deg The saturation pressure of the air, Psat =…

Q: yquandj3iakzjwkoqKd ywuajxjeuiqias jgo4oajzuwuq udiqijNxjd 4. At 1:00P.M, a thermometer reading is…

A: thermometer reading is 70°F is taken outside where the air temperature is -10°F. At 1:02P.M, the…

Q: A 0.65m3 vessel contains a mixture of air and carbon dioxide with a pressure of 232kPa and a…

Q: Five kg of water vapour are contained at 150 kPa ad 90 per cent quality in a suitable enclosure.…

A: Given Data The mass of the water vapour is: m=5 kg The initial pressure of the water vapour is:…

Q: A quantity of moist air of mass 4 kg has a humidity ratio of 0.019 and a relative humidity of 65%.…

Q: The air in a house is at 19°C, 59% relative humidity, and total pressure 89kPa. If air is cooled at…

Q: Calculate the daily evaporation rate (in mm/ day) from an open surface, if the net radiation is 220…

A: To Find : The daily evaporation rate in (mm/day) from an open surface.Given : The radiation is The…

Q: A quantity of moist air of mass 3 kg has a humidity ratio of 0.015 and a relative humidity of 60%.…

Q: At a climate station, air pressure is measured as 101.1 kPa. The air temperature was 22 0C and dew…

A: Given Data The air pressure is: Pa=101.1 kPa The air temperature is: Ta=22°C The dew point…

Q: At 1:01P.M, a thermometer reading is 90°C is taken outside where the air temperature is -10°C. At…

Q: A furnace heating unit has an airflow of 2,500 CFM. The heating coil entering temperature is 35°F…

Q: termine the mass of air in Ibm when the pressure is 24.54 psi and the temperature is 82.7°F in a…

A: Given:P=24.54 psiT=82.7°FV=31.2*17.7*16.6 =9,167.184 ft3

Q: If 15.7 m³ of atmospheric air at 149 degrees centigrade temperature are compressed to a volume of…

Q: You want to humidify and heat humid air at 10ºC and 40% relative humidity, up to 24ºC and 60%…

A: Given: T1=10oC φ1=40% T2=24oC φ2=60% Tw=20oC To find: The heat required, Qin.

Q: calculate the heat transfer of 6.2 kg of lead to water

Q: A dormitory room measures 4m x 6m x 6m. A student turns on a 150 watts fan before leaving the room…

Q: determine the saturation mixing ratio and the mixing ratio of each of the following air samples.…

A: Temp: 140C ; RH: 90% Temp: 200C ; RH: 60% Temp: 240C ; RH: 40% Temp: 300C ; RH: 40% Temp:…

Q: Calculate the heat transfer of 2.4 kg of water to vapor

Q: Using the equations for the Barometric Law and temperature decrease from adiabatic expansion (found…

A: Given Data h=5km T=288K γ=1.4 Using the Barometric Law as Follows

Q: A tank contains 0.50 m^3/kg of steam. Heat is transferred at constant volume until the pressure…

Q: In continental interior areas of Canada, winter air is usually cold and dry (contains little…

A: Given: T1 = -10 C RH = 70% T2 = 20 C To find: New relative humidity

Q: Situation 5. 5.1. Calculate the density of water vapor at 350 KPa abs and 20° C if its gas constant…

A: The given data in the problem is listed in the following attached image:

Q: Calculate (a) the specific volume, (b) the enthalpy, and (c) the absolute humidity of the air at 40…

A: Given data: Dry bulb temperature Tdb=40° Relative humidity(RH)=0.49…

Q: 8. What is the amount of heat required to evaporate 1 kg of saturated liquid water at 1000 kPa?

Concept explainers

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.

Question

need some help with this one.
The water vapor pressure of ambient air is 19 mmHg, and the wind speed is 1.7 m/s. Calculate the
maximum evaporative heat loss (Emax in watts). (Assume skin temperature is 35°C; vapor pressure at
35°C is 42 mmHg., and a standard worker)
-53
O 232
O 232
O 30
O -30
O 53

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 Given data

VIEW

Step 2 Calculate the maximum evaporative loss

VIEW

Step 3 Result

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 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

In the summer, when the air motion is increased body heat loss is also increased. True or false ?
(cc) BY-NO-SA Niel Crews, 2013 An insulated, rigid vessel is initially empty (evacuated). However, it is connected to a steam line that is maintained at 200 psia and 500 °F. The valve is opened until the flow into the tank slows and stops (which occurs when the pressure in the tank is equal to the pressure in the steam line), at which point the valve is closed. What is the temperature within the vessel? °F
QUESTION 2 A new induced raft cooling tower is circulating 120 000 L/h of water that is cooled from 50 °C to 22 °C. How much blow-down and make-up is required to maintain the concentration of dissolved solids in the circulating water at four times the concentration in the make-up water? Assume the following: - The evaporated water contains no dissolved solids so all solids entering the system in the make-up must be removed by blow-down and windage. - The windage value of the induced draft cooling tower is 0.3% for each 5.6 °C. - The evaporative losses value is 1.1%.
D. Much of the humidity in the air comes from vaporization from large bodies of water, like the Schuylkill and Delaware Rivers. Assuming the area of Philadelphia is 3.6 x 108 m² and the height of the city is 297 m (top of Comcast center), calculate the energy needed to reach 100% humidity by vaporizing water from the rivers at the afternoon high temperature. (For the sake of this exercise, assume ideal gas applies) a. Having trouble? Review questions from Chapter 10: 51.
Q# 2: Chapter 14: Gas vapor mixtures and air-Conditioning (Psychrometric chart) doly to design air conditioning systems using the psychrometric chart, and mass and energy balance relations CLO 4 Air enters an air-conditioning system at 20C and 70 percent relative humidity at a rate of 2 m' /min It is cooled to 15 °C and saturated when the liquid water leaves the system at 32°C. Calculate the amount of water removed from the air and the rate of heat removal from the air.
Outside air at 30 C drybulb & 25 C wetbulb temperature flowing at a rate of 25,000 liters/min is mix with colder air at 20 C drybulb & 18 C wetbulb temperature flowing at a rate 70,000 liters/min. After mixing , the mxture undergoes sensible heating up to 40 C . Compute the heating needed in kW. Plot the process on the Psychrometric chart and label it completely. Can you upload the chart also?
Psychrometric process A room has dimensions of approximately 10m x 10m x 3m. Assume the air inside the room to be at T= 20 oC, P = 100 kPa, Relative Humidity = 50% a. If all of the water vapor in the air of the room could be converted to liquid at the same temperature, what is the volume of the liquid (mL)? b. If the room temperature were slowly cooled without changing the composition of air, at what temperature would you expect to see condensation occurring (oC)?
4. At 3:01P.M, a thermometer reading is 90°C is taken outside where the air temperature is -10°C. At 1:03P.M, the reading is 36°C. At 1:07 P.M, the thermometer is taken back indoors where the air temperature is at 90°C. What is the thermometer reading at 1:10P.M?
Hi, pleass help me solve this problem. I need it asap. Thank you so much. *** A thermometer in a 10 x 8 x 4 m room reads 25°C and a humidistat reads the R. H. to be 33%. What mas of water vapor is in the room? Saturated air at 25°C contains 19.33 g h2O/m^3.
What is the mass of 2m3 of liquid air at a dry bulb temperature of 210C and a liquid temperature of bulb 150C? (A: 2.37 kg)
Q1/ Calculate the cooling load of moist air from dry-bulb temperature 22 Cº and wet- bulb temperature 16 C° to dry bulb 17 C°. Assume air flow rate is 1.5 m³/s.
A 5 x 10 meters kitchen area (average ceiling height is 2.8 meters) is to design for general ventilation. There are 6 personnel working in the kitchen and the heat generated in this area is estimated at 90,000 Btu/hr. The design indoor temperature is 26°C and outdoor air temperature is 35°C. Calculate the ventilation rate (in cfm) using: (1.) Area Method, (2.) Air Change Method, (3.) Occupancy Method, and (4.) Heat Removal Method.