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ASHRAE Design Guide For Dedicated Outdoor Air Systems – DOAS 2017

ASHRAE Design Guide For Dedicated Outdoor Air Systems (DOAS) 2017

ASHRAE Design Guide For Dedicated Outdoor Air Systems A DOAS uses separate equipment to condition all of the outdoor air brought into a building for ventilation and delivers it to each occupied space, either directly or in conjunction with local or central HVAC units serving those same spaces.

A DOAS system (1) improves humidity control, (2) reduces energy use, (3) simplifies ventilation design and control, (4) uses heating and cooling equipment that doesn’t provide ventilation and/or dehumidification (e.g., radiant panels or passive chilled beams), and (5) reduces installation cost.

You can also Read ASHRAE Design Guide for Cleanrooms: Fundamentals, Systems, and Performance

Comprehensive guidance from industry experts can simplify DOAS design, installation, operation, and management.

DOAS is growing in popularity, but is still a relatively new technology. The lack of DOAS exposure and experience means many systems designed and installed today don’t take full advantage of all the benefits DOAS can offer. consolidates existing material to focus on the major issues while referring to supplemental sources for more specialized or in-depth information.

ASHRAE Design Guide For Dedicated Outdoor Air Systems -DOAS 2017 Content

  • Chapter 1: Introduction DOAS, dedicated outdoor air systems, systems design, outdoor air, system heating and cooling, efficienc

Reasons for Using DOAS
Role of the Designer

  • Chapter 2: Outdoor Air and Load Requirements

Outdoor Air Requirements
The Outdoor Air Design Conditions
Outdoor Air Loads

  • Chapter 3: System Selection

Common Approaches to Air Distribution
DOAS Equipment Configurations
System Selection Considerations

  • Chapter 4: Detailed Design Considerations

Codes and Standards
Air Distribution
Dehumidification and Cooling
Air-to-Air Energy Recovery
Energy Recovery Effectiveness
Filtration/Air Cleaning

  • Chapter 5: Controls

Control of the DOAS Unit
Humidity Control
Temperature Control
Energy Recovery Control
Frost Control
Outdoor Airflow Control
Building Pressurization Control
Sensors and Instrumentation
Building Automation
Sequence of Operations

  • Chapter 6: Construction

Construction Phase Process

  • Chapter 7: Operation and Maintenance

Operation and Maintenance of DOAS Equipment
Case Study

  •  A:Sample DOAS Installation Checklist
  •  B:Sample DOAS Operational Checklist
  • References



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