Displacement ventilation


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Displacement ventilation

A method of space conditioning where conditioned air is supplied at or near the floor. Since the air is supplied at very low velocities, a cool layer of air collects in the occupied zone resulting in comfortable conditions for the occupants. Buoyant forces remove heat generated by occupants and equipment, as well as odors and pollutants, all of which stratify under the ceiling and are extracted from the space by return or exhaust fans. Displacement ventilation systems were originally used in industrial facilities and subsequently in office buildings, auditoria, performing arts centers, and spaces with large interior volumes. These systems are effective in improving indoor air quality as well as providing energy savings when compared with a conventional fully mixed system.
References in periodicals archive ?
The housing facility would incorporate displacement ventilation, Gamache says; a concept that banks on natural rules of heat displacement.
Super-insulated walls, in-floor heating, passive heating and lighting via extensive use of windows, heat recovery and displacement ventilation figure large in reducing the cost of heating and cooling the terminal.
System Performance Evaluation and Design Guidelines for Displacement Ventilation.
Displacement ventilation systems help keep the building cool while limiting the need for air conditioning.
Throughout the facility, patient thermal comfort is maintained by radiant heating and cooling in combination with displacement ventilation.
8226; Displacement ventilation, and radiant floor heating and cooling systems for efficient energy consumption and air circulation in the main lobby area
The impact of these transmission routes for two persons is investigated in detail by evaluating the exposure to gaseous substances (simulating particles <5 [micro]m) in a room with a vertical temperature gradient obtained by displacement ventilation.
The rest of the time the building uses displacement ventilation with heat recovery.
Its atrium air conditioning saves 50 per cent energy by utilising displacement ventilation.
With good displacement ventilation, (air reaches occupant without mixing), effectiveness tends towards infinity and air quality tends towards being infinitely good.
The sustainable design technologies that WSP Flack + Kurtz pioneered on behalf of Pelli Clarke PelliArchitecture have led to a 30% improvement in energy efficiency compared to a similar building meeting the minimum code requirements, an estimated savings of 31 million gallons of water each year, as well as an improved indoor air quality in the casino through the use of a displacement ventilation system.
Making sure space is available for photovoltaic cells and solar water heating, and sufficient slab-to-slab heights are provided to move from conventional fan coil air conditioning to displacement ventilation systems or passive systems.