Seminar part of ASHRAE Distinguished Lecture Series

ASHRAE Qatar Oryx Chapter has announced conducting a full day seminar titled “Space Pressurisation: Concept and Practice” on March 8 at the Millennium Hotel, Doha, as part of the ASHRAE Distinguished Lecture Series. The seminar will be presented by Jim Coogan, the announcement informed.

The organisers gave the following event details:

Agenda:

Introduction (10 min):

• Definition, objectives and applications
• Scientific research labs
• Hospital spaces
• Scope of this talk

Theory and Concepts 1: Infiltration and containment (40 min):

• Mechanical process of infiltration
• Velocity, area, pressure
• Infiltration curves
• Importance of the envelope
• Select pressurisation level
• Specifying the room envelope

Pressurisation via HVAC (40 min):

• Required pressure relationships
• Control methods explained and compared

1. Differential flow control
2. Pressure feedback
3. Cascade control
4. Special methods

• Selecting a pressurisation control method
• How tight is tight?
• Required pressure relationships (again)

Designing pressurisation and control (40 min):

Designing pressure feedback systems

• Design control sequence
• Specify the components

Consider the envelope

Designing flow tracking systems

• Design control sequence
• Consider the envelope
• Select pressurisation level
• Select pressurisation accuracy target

Determine needed flow control accuracy

Air flow control components (15 min):

• Dampers
• Flow sensors
• Controllers
• Specify components or performance

Theory and concepts 2: Air flow control accuracy (30 min):

Control loop accuracy

Sensing accuracy

• End-to-end accuracy
• Kinds of sensing errors
• Errors in flow sensing system

Review complete design process for flow tracking (20 min):

• Determine pressure relationships
• Select pressurisation level
• Calculate required flow accuracy
• Check for practicality
• Adjust as needed

Examples (20 min)

Summary (5 min)

Important details:

• Time: 9 am to 1 pm (Including lunch and coffee breaks)
• Venue: Millennium Hotel, Simsima Ballroom
• Catering: Coffee and lunch will be provided during the day.

Ticket fee:

• Free for ASHRAE members
• QR50 for non-members (to be paid at the registration desk)

Seminar organisers have requested participants to register as soon as possible to enable them to prepare certificates of attendance and to make the necessary arrangements.