Steam heating coil air humidifier AHU with recuperator ventilation device

Product Overview

Description

Steam heating coil air humidifier AHU with recuperator ventilation device

Features of Combined/Modular Floor Type Heat Recovery/Recuperation Air Handling Unit

1. Both supply fan and exhaust fan are built inside to bring in fresh air and exhaust out the stale indoor air as well, thus to keep indoor space in natural comfort.

 

2.  Built-in heat exchanger (rotary heat exchanger or plate heat exchanger) transfers energy contained in the outgoing indoor air to the coming fresh air,thus fresh air is precooled or preheated.

 

3. Various functional sections such as filter section,cooling/heating section, humidifying section etc. can be combined together to meet different air treatment requirements.

 

4.Frost resisting cold bridge design

Double-skin panel sandwiched with high density PU foam, thermal conductivity below 0.01999W/m•°C, ensuring high performance between -40°C and +70°C.

 

5. High mechanical strength

Galvanized sheet inner skin, color steel sheet outer skin, strong steel framework, pressure endurance up to 2000Pa, suitable for large air application.

 

6. High air impermeability

Double inlaid sealing to join the frameworks and panels tight, minimizing air leakage.

 

7. Flexible combination

Designed with 102mm modulus, frameworks and panels are flexible to change according to design requirements. 

 

Functional Section Introduction of  Combined/Modular Floor Type Heat Recovery/Recuperation Air Handling Unit

Holtop  combined/modular AHU can combine different functional sections based on clients' request, it is easy to do customization to use in different places.

1) Cooling/Heating Section

1)AHU adopts heat exchange coil made from copper or aluminum fins and copper pipe. Copper pipe is expanded mechanically and aluminum fin is double-side bended in wave type. It is featured by high coefficient of heat thermal
coefficient, low air resistance, compact structure and excellent performance resulted from the advanced structure, reasonable water path, pipe length and fin gap. Low-temperature and fast braze welding on copper pipe reinforces its pressure resistance over 1.2Mpa.

 

 2)The hexenoic acid hydrophilic coating on the aluminum fin can avoid water bridge between the fins to ensure efficient
ventilation of coil, without water bridge, heat exchange rate can be increased by 5%. Besides, this coating can enhance the
corrosion and weather resistance ability, thus to prolong the service life of coil.

 

3) If wind-speed is over 2.75m/s, an aluminum alloy breakwater can be set behind the coil to prevent water in the airflow entering other functional parts followed.

 

Steam heating coil
The standing steam-heating coil with copper pipe and fin is able to solve the problems of vacuum, water hammer etc.caused by the modal change of steam inside the pipe. This design moves away the above factors influencing the efficiency of heat exchange and ensures the smooth drainage of condensation water to protect the coil from frozen damage.

 

 

2) Heat Exchanger Section(Rotary or Plate Heat Exchanger)

1)Rotary heat exchanger (heat recovery wheel) is mainly used in building ventilation or in the air supply/discharge system of airconditioning equipment. The wheel transfers the energy (cold or heat) contained in exhaust air to the fresh air supplied to indoor.

 

 

2) Plate-fin heat exchanger is made up of thin flat plates and corrugated plates. These two types plates form channels for fresh or exhaust air stream. When the two air steams are passing through the exchanger crossly with temperature difference, the energy is recovered. Both sensible heat exchanger and total heat exchanger are available.

Sensible heat exchanger is made of vey thin aluminum foils, featured by high thermal conductivity. It transfers sensible heat only, suitable for circumstances with high temperature difference between indoors and outdoors.

Total heat exchanger is made of special fiber paper, featured by which is featured by high moisture permeability,
good air tightness, excellent tear resistance, and aging resistance. It transfer both sensible and total heat, i.e.
temperature and moisture, suitable for areas of humid climate.
 

 

3) Fan Section

 We offer different types of fans such as direct driven centrifugal fan, belt driven DIDW forward centrifugal fan, and
belt driven DIDW backward centrifugal fan etc..

 

5) Humidifying Section

Wet film humidifier, dry steam humidifier or double gasified humidifier is available for choice.
Wet film humidifier
It utilizes spontaneous evaporation of water on the film face to humidify the air, water supply is 3 times the humidifying capacity. It is featured by low requirement on water, simple structure, easy installation and long service life.

Dry steam humidifier
Suitable for occasions where steam is available. It use nozzle humidifying method for small airflow and steam quick absorption humidifying method for large airflow.

Double gasified humidifier
This system incorporates the stress spray humidifying technology and wet-film humidifying technology in an
effective way. It makes better humidifying, consumes less water and makes better cleanness.

 

 

6) Filter Section

In order to ensure heat exchanging efficiency and cleanness, combination of G3 coarse filter and F5 medium filter is selected as standard configuration.

Coarse filter

corrugated plate type, 25mm or 46mm in thickness, made of nylon or non-woven fabrics, efficiency rating at G2, G3.

 

Medium filter

bag type, made of fire-proof chemical fibres, efficiency rating at F5~F8.

High-medium/sub-HEPA filter

bag or pleat type, made of fiberglass, efficiency rating at F8~H10.