introduction to ventilation & indoor air quality · egypt. a keynote speaker and administered...
TRANSCRIPT
![Page 1: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/1.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
PRESENTED BY:
Eng. Shehab S. Bekhet
![Page 2: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/2.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
How much time - %, do we spend indoors??
2
![Page 3: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/3.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
We Spend 90% of Our Time Indoors! !
3
![Page 4: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/4.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
4
![Page 5: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/5.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
More than 27 years of various experience, gained throughout long career path covers wide and diversified fields and ranges of responsibilities combining design, construction and technical back-up skills. The range of mechanical works cover preliminary & detailed design, preparation of specification and tender documents, follow up, approval of shop drawings and project management and construction supervision of building services including HVAC, plumbing, fire protection, building automation and control systems.
Successfully contributed to design and construction of several large projects in more than 12 countries in the Gulf Area, Middle East, and Africa, such as:
• Dubai International Airport- UAE • Higher College for Men & Women- UAE • Development of King Abdul Aziz Endowment for the Two Holy Mosques. • Al Hassa & Al Dammam Hospital – Saudi Arabia • Rafik Al Hariri Airport – Lebanon • Sheraton Hotel Rehabilitation – Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC
systems.
Shehab Bekhet
Senior Mechanical Engineer Dar Al Handasah
![Page 6: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/6.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
6
![Page 7: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/7.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
Introductory Film Indoor Ar Quality
![Page 8: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/8.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
8
![Page 9: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/9.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
9
Indoor Air Quality, (IAQ): Definition. Common Pollutants and health effect. Sick Building Syndrome. How to obtain Good Air Quality?
Ventilation: Types of Ventilation. Ventilation requirement for building occupants. Ventilation Applications Notes: Public Toilets Ventilation. Commercial Kitchens Ventilation.
The presentation covers the following main items:
![Page 10: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/10.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
10
Definition: (IAQ) represents the indoor air concentrations of pollutants that are known to affect people’s comfort, environmental satisfaction and health.
![Page 11: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/11.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
11
![Page 12: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/12.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
12
Indoor Pollutants groups
![Page 13: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/13.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
13
Serious health impacts resulting from poor IAQ include; lung cancer, airborne infection, SARS, and carbon monoxide (CO) poisoning.
Poor IAQ Health Impact
![Page 14: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/14.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
14
Building-related symptoms including; eye, nose and throat irritation, headache, fatigue, upper respiratory symptoms, and skin irritation and rashes.
This term has been used to describe the excess prevalence of this collection of symptoms, without attribution to specific illnesses.
![Page 15: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/15.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY Q. How to obtain Good Air Quality?
15
1.Manage the design & construction stages of new buildings to achieve Good IAQ.
2.Limit contaminants from indoor and outdoor sources.
3.Exhaust contaminants from building equipment and activities.
4.Control moisture in building.
![Page 16: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/16.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
How to Manage the design stage to achieve Good IAQ?
16
Consider the recommended fresh air & exhaust air requirement.
Select HVAC systems to improve IAQ. Proper selection of building construction materials Building Pressure Control.
![Page 17: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/17.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
Lack of IAQ consideration during
Construction/Hand-over stage
17
Occupancy During Construction:
Large amounts of dust generated. Gaseous contaminants from paint, etc... Out gassing from new carpets, etc...
![Page 18: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/18.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
Limit Contaminants From Outdoor Sources:
18
Locate outdoor air intakes to minimize introduction of contaminants.
Limit contaminants from indoor sources: Dust (especially from paper). Lint, hair, fibers and Mold. Tobacco smoke. Volatile organic compounds from cleaning compounds, furniture, copiers, printers, etc. Toiletries and perfumes.
![Page 19: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/19.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
Improper Building
Operation & Maintenance
19
Inadequate pest control. Improper operation & maintenance of HVAC system. Changing space usage: Actual space usage is different from original design
![Page 20: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/20.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
The importance of Indoor
Design Condition
20
The Importance of Air Distribution
• To provide an acceptable thermal environment. • To provide well distributed fresh air. • To remove contaminated air.
![Page 21: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/21.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
21
.
Important!
There are many green building efforts that are impacting the provision of IAQ in buildings.
![Page 22: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/22.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
Ventilation
Ventilation air is the amount of outdoor air required to maintain Indoor Air Quality.
22
![Page 23: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/23.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
23
Natural ventilation is Supplying and removing air without using mechanical systems.
BENEFITS OF NATURAL VENTILATION Energy savings. Occupant control. There are some Cases in which natural ventilation may not be possible!
Natural Ventilation
![Page 24: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/24.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
24
Mechanical ventilation systems circulate Ventilation air using ducts and fans. • Better Indoor Air Quality • Better Control Avoid air leaking into the building from undesirable areas. Provide proper fresh air flow with selected locations for intake and exhaust.
Mechanical Ventilation
![Page 25: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/25.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
Pressure Relation
25
Some Sorts of Cross Ventilation
![Page 26: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/26.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
How to determine the required Ventilation rate?
• Estimate no. of Occupants for each space/zone. • Determine the recommended fresh air for IAQ. (utilize
ASHRAE application handbooks, and ASHRAE Standards 62.1 for indoor air quality).
• Determine the recommended exhaust air rates for various areas/process, such as; toilets, kitchen, stores, etc…
26
![Page 27: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/27.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
Why Proper Toilets Ventilation is an Important issue?
27
Surprising toilet facts!
• We spend about 3 years of our lives in the toilet! • An average person visits the toilet 2500 times a year! • Almost all buildings include toilets! • In order to avoid visiting poor ventilated public toilets, some
people refrain from drinking liquids and suffer from dehydration!
VENTILATION APPLICATION NOTES
![Page 28: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/28.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
Common toilet exhaust and makeup system design
28
A poor design of a toilet exhaust and makeup air system for a typical public men’s toilet is summarized as follows: The exhaust rate is based on 10 air changes / hour. Air is exhausted above each water closet and urinal. Makeup air is supplied by a constant volume reheat box connected to the A/C. unit.
![Page 29: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/29.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
29
Using ACH per hour, to size ventilation system could be used as a guidance, where detailed layout is not available.
The ventilation rate is proportional to the source of odors
which has no relationship to the volume of the room.
To determine ventilation rates; use the airflow per plumbing fixture (urinal or water closet) as prescribed by ASHRAE Standard 62.1.
![Page 30: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/30.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
Number of Exhaust Grilles
30
Using less exhaust grilles results in almost the same airflow patterns.
Providing multiple exhaust grilles also leads to higher balancing costs.
![Page 31: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/31.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
31
Toilets Makeup Air
Option 1: Door undercut or door louver The undercut or door louver must be coordinated
with the Architect. Option 2: Ducted transfer from adjacent space(s) ceiling return air plenum.
![Page 32: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/32.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
32
Why do we care for kitchen ventilation?
More than 3 Billion CFM
exhausted from Commercial
Kitchens in the U.S!!
KITCHEN VENTILATION
![Page 33: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/33.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
33
Types of Hoods According to Configuration
Remove cooking fumes at the source. Remove excess hot air /introduce cool clean air.
kitchen ventilation system should:
![Page 34: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/34.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
34
Exhaust flowrate according to Appliance Duty Classifications
![Page 35: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/35.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
Proximity Hood
35
Effective Design Ineffective Design
Island exhaust hood with air jet
Is effective design
![Page 36: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/36.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
Kitchen
High air transfer Limited air transfer
KITCHEN VENTILATION-HVAC INTEGRATION
Restaurant Kitchen Restaurant
![Page 37: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/37.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
Demand-Controlled Ventilation (DCV)
37
stopped
Restaurant Restaurant Kitchen Kitchen
operational
By Utilizing infra red sensors & duct temperature sensors to control the operation of the ventilation fans.
![Page 38: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/38.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
38
![Page 39: INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY · Egypt. A keynote speaker and administered many of training courses and seminars in various topics of HVAC ... INTRODUCTION TO VENTILATION](https://reader035.vdocuments.us/reader035/viewer/2022063003/5f7477f636ddc30c020cf45c/html5/thumbnails/39.jpg)
INTRODUCTION TO VENTILATION & INDOOR AIR QUALITY
THANK YOU FOR ATTENDING THE PRESENTATION Please don´t forget to collect your CPD certificate during the event from the CPD collection area