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Sistemas de distribución de aire para salas limpias
Unidad terminal de recalentamiento VAV de un solo conducto
A pressure-independent single-duct terminal that meters primary air and reheats the minimum airflow before discharge to a perimeter or process-support zone.
- Pressure-Independent VAV Control
- Integral Hot-Water or Electric Reheat
- Averaging Inlet Flow Sensor
- Acoustically Lined Casing
Introducción del producto
The single-duct VAV reheat terminal unit combines a round primary-air inlet, averaging flow sensor, modulating damper and rectangular discharge casing with an integral heating section. During cooling demand, the controller varies primary airflow between programmed minimum and maximum values. When the zone requires heat, airflow is held at the heating minimum while a hot-water valve or staged electric heater raises the discharge temperature. An acoustic liner and optional attenuator control regenerated noise, while coil access panels support inspection of the downstream heating section.
Características clave
Hot-water or electric reheat adds sensible heat downstream of the control damper without a terminal fan.
Programmed cooling, ventilation and heating minimums allow airflow to follow the zone operating sequence.
Acoustic lining and optional discharge attenuator reduce radiated and air-path noise above occupied spaces.
Preocupaciones del producto del cliente
A reheat terminal must preserve required ventilation airflow, prevent discharge overheating, control noise and keep the heating coil and controller accessible above the ceiling.
Reducing cooling airflow below the ventilation minimum compromises room air exchange.Separate programmed cooling and occupied minimums keep primary air above the required ventilation quantity.
Reheat energizes at too little airflow and produces excessive discharge temperature.Airflow proof and a defined heating minimum enable the coil or heater only when sufficient air passes through the box.
High inlet static pressure produces objectionable regenerated noise over the room.Correct inlet sizing, duct-pressure reset and acoustic attenuation limit velocity and throttling sound.
A leaking water coil valve causes simultaneous cooling and heating energy waste.A tight-closing modulating valve and discharge-air temperature monitoring expose unintended heat input.
Aplicaciones típicas
Cleanroom perimeter support zonesLaboratory offices and write-up roomsHospital patient and support spacesPharmaceutical corridors and gowning roomsCommercial zones with central cool air
Parámetros técnicos
Representative casing construction ranges for a single-duct VAV terminal with integral reheat are shown below.
| Materiales Core | 32–48 kg/m³ mineral-fiber acoustic liner behind galvanized casing with copper-tube aluminum-fin reheat coil |
|---|---|
| Panel de espesor | 13–25 mm internal acoustic liner |
| Ancho efectivo | 300–1000 mm nominal terminal casing width |
| Longitud máxima | Up to 1800 mm combined terminal, attenuator and reheat-section length |
| Acero frente a espesor | 0.7–1.0 mm galvanized casing and access panels |
| Densidad Core | 32–48 kg/m³ mineral-fiber acoustic lining |
| Conductividad térmica | Approximately 0.035–0.045 W/(m·K) for the acoustic liner |
| Superficie acabada | Mill-galvanized casing with cleanable liner facing and corrosion-protected coil frame |
| Tipo conjunto | Round inlet to rectangular lined casing with integral sensor, damper and flanged downstream reheat section |
| Customization | Disponible según la aplicación prevista y el entorno operativo. |
Opciones disponibles
One- to four-row hot-water reheat coilStaged or proportional electric heaterIntegral discharge attenuatorFactory-mounted DDC controller and valve package
Planning a Single-Duct VAV Reheat Terminal Unit specification?
Envíenos sus dimensiones, condiciones de instalación, objetivos de rendimiento y acabado superficial requerido.
