Q5: Imagine that you do not want the CO2concentration to exceed 766 ppm. What is theminimum ventilation rate that is required for ahouse of 4 people? Assume the house has 3bedrooms, a total volume of 11,105m^3 with 3mceilings, the outdoor CO2 concentration is 400ppm and CO2 is produced at a rate of .005 L/SCO2/person. Assume 100% outdoor air with norecirculation. Report answer in L/s and round tothe nearest integer. Determining Whole-Building Ventilation Rates for Residential BuildingsWhole-building ventilation replaces an amount of stale, indoor air with ventilation from the outdoors. It isintended to dilute indoor pollutants and provide acceptable air quality. ASHRAE Standard 62.2, Ventilation andAcceptable Air Quality in Low-Rise Residential Buildings, defines the roles and minimum requirements formechanical systems, natural ventilation systems, and building envelopes intended to provide acceptableindoor air quality (IAQ) in residential buildings. We will use the following formula from ASHRAE Standard 62.2to calculate the total required ventilation rate:Q = 0.15Afloor + 3.5 (Núr + 1)Where:Q is the total required ventilation rate (L/s)A floor is the dwelling-unit floor area (m2)Nbrisnumofedrooms (not toless than 1)Once we know the ventilation rate in a space of a given volume, we can also calculate the steady-state CO2concentration using the following formula:GNKCinCout +Where:Cin is the indoor steady state concentration of C02, expressed as parts per million, or ppm(dimensionless)Cout is the outdoor concentration of CO2 that is in the fresh air from outdoors, expressed as parts permillion, or ppm (dimensionless)G is the generation rate of CO2 per occupant (L/s of CO2/ person)N is the number of occupants (people)O is the total ventilation rate (L/s)K is a constant to introduce units of ppm (K is equal to 1,000,000)

Cin=Cout+GNKQ Cin= 766 ppm Cout= 400 ppm G= 0.005 N= 4 people K=1000000

Q5: Imagine that you do not want the CO2 concentration to exceed 766 ppm. What is the minimum ventilation rate that is required for a house of 4 people? Assume the house has 3 bedrooms, a total volume of 11,105m^3 with 3m ceilings, the outdoor CO2 concentration is 400 ppm and CO2 is produced at a rate of .005 L/sCO2/ person. Assume 100% outdoor air with no recirculation. Report answer in L/s and round to the nearest integer.

Q5: Imagine that you do not want the CO2 concentration to exceed 766 ppm. What is the minimum ventilation rate that is required for a house of 4 people? Assume the house has 3 bedrooms, a total volume of 11,105m^3 with 3m ceilings, the outdoor CO2 concentration is 400 ppm and CO2 is produced at a rate of .005 L/sCO2/ person. Assume 100% outdoor air with no recirculation. Report answer in L/s and round to the nearest integer.

Solid Waste Engineering

3rd Edition

ISBN:9781305635203

Author:Worrell, William A.

Publisher:Worrell, William A.

Chapter5: Separation Processes

Section: Chapter Questions

Problem 5.22P

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