Polystyrene plate counter-flow heat exchangers

Series HU-EX6/HC-EX6/Combi HC-EX6

GENERAL DESCRIPTION

The HU-EX6/HC-EX6/Combi HC-EX6 counter-flow heat exchangers are specifically developed for heat recovery in balanced ventilation systems. These heat exchangers allow efficient use of extract air energy for heating or cooling, thus optimizing ventilation and providing healthy indoor climate.

Due to the unique heat exchanger design and the shape of the heat exchanging plates the heat exchange surface is maximized and the pressure losses are minimized. This heat exchanger type is compatible nearly with all ventilation systems.

The supply and extract air streams move in opposite directions toward each other. The heat energy is transferred through the thin plates. Heat recovery efficiency exceeds 90 %.

DESIGN #1 HU-EX6/HC-EX6

• The heat exchanger has a hexagonal shape with the overall dimensions of 366х366 mm, 172х397 mm, 230х455 mm, 232х461 mm, 271х496 mm, 312х537 mm, 394х619 mm, 477х700 mm and 533х758 mm (length and width).

• The maximum depth is 600 mm.

• The heat exchanger consists of a heat accumulating mass (a set of plates) and a casing. The assembled and interconnected plates build a heat exchanging stack with air channels. The extensional channels in the plates are parallel located. The air streams move in the channels and do not get mixed.

• The geometry and distance between the plates provide maximum efficiency with the lowest pressure differential.

NEW HU-EX6 366 SERIES

• The HU-EX6 366 is a counter-flow heat exchanger with improved heat recovery efficiency and reduced pressure differential compared to the HC-EX6 series.

• The improved performance of the new series has resulted in:

  • Higher heat transfer efficiency. 5% higher compared to the HC-EX6 series.
  • Lower pressure differential. The new model has the lowest pressure differential even with air flow rates exceeding 300 m³/h. 

Test results of HU-EX6 366/400-2 and HC-EX6 366/400-2 models with a depth of 400 mm, test conditions according to DIN EN 13141-7 (as well
as EN 308).

ADVANTAGES

  • High quality of materials and product assembly.
  • 5% higher heat recovery efficiency compared to the HC-EX6 series.
  • Reduced pressure differential.
  • Operating modes: -25 °C + 50 °C. 
  • 100% tightness test.
DESIGN #2 «COMBI HC-EX6»
  • Combi HC-EX6 consist of two heat exchangers of the same size installed in parallel, assembled in a monolithic structure made of high quality aluminum alloy that provides maximum resistance to corrosion in humid environments. Counter-flow air flows pass in parallel through the two heat exchangers, distributing at the inlet in the ducts.
  • Models available in this design:
     – Combi HC-EX6 815/…-3, which consists of two HC-EX6 394/…-3.
     – Combi HC-EX6 959/…-3, which consists of two HC-EX6 477/…-3.
     – Combi HC-EX6 1089/…-3, which consists of two HC-EX6 533/…-3.
  • The maximum depth of the heat exchangers is 600 mm.
APPLICATIONS
  • Domestic ventilation units
  • Heating and air conditioning systems
  • Full separation of air streams
  • Heat recovery in winter
  • Cool recovery in summer
  • Premises with no air circulation
  • School premises
  • Office buildings
AIRTIGHT SEALING

Air sealing process is automated.

High-quality hot-melt synthetic-base polymer adhesive used in food and pharmacy industries provides air tightness.

APPLIED MATERIALS
  • The heat accumulating mass is made of special impact-resistant polystyrene with the thickness of 0.2 up to 0.3 mm. This material is featured with high thermal conductivity and performance characteristics.
  • All the casing components can be made of:
    – quality sheet metal (aluzinc)
    – impact-resistant polystyrene;
    – high-strength aluminum alloy.
MODIFICATIONS
HEAT EXCHANGER PLATES

Basic modification «Standard». HU-EX6/HC-EX6/Combi HC-EX6

The heat exchanger plates are made of polystyrene.

Suitable for all types of counter-flow heat exchangers of the HU-EX6, HC-EX6 and Combi HC-EX6 series.

CASING

Version 1. Aluzinc casing

The casing components are made of high-quality aluzinc plates.

This version is used for the sizes 172×397 mm, 230×455 mm and 271×496 mm.

Version 1.1. Aluzinc casing with T-profile

All elements of the casing are made of aluzinc. T-profile is used instead of a standard profile. This profile is used in case of a special mounting in the air handling unit.

This version is used for the sizes 172×397 mm, 230×455 mm and 271×496 mm.

Version 2. Plastic casing

The head plates, side plates and the profiles are made of impact-resistant polystyrene.

This modification is used for the sizes 366×366 mm, 230×455 mm and 232×461 mm.

Version 2.1. Plastic casing with T-profile

All the casing components are made of impact-resistant polystyrene. T-profile is used instead of a standard profile.

This profile is used in case of a special mounting in the air handling unit. This version is used for the sizes 366×366 mm, 230×455 mm and 232×461 mm.

Version 3. Aluminium casing

The casing elements are made of high-quality aluminium alloy, which provides maximum protection against corrosion.

This type of casing is used for the sizes 312×537 mm, 394×619 mm, 477×700 mm and 533×758 mm, as well as assembled combiblocks 815×1040 mm, 959×1182 mm and 1089×1314 mm.

NameOverall dimensions [mm]PolystyreneCasing modification
НС-ЕХ6 366/…366х366+2/2.1
HU-EX6 366/…366х366+2/2.1
HU-EX6 172/…172х397+1/1.1
НС-ЕХ6 230/…230х455+1/1.1/2/2.1
НС-ЕХ6 232/…232х461+2/2.1
HU-EX6 271/…271х496+1/1.1
HU-EX6 312/…312х537+3
HC-EX6 394/…394х619+3
HU-EX6 477/…477х700+3
HC-EX6 533/…533х758+3
Combi HC-EX6 815/…815х1040+3
Combi НС-ЕХ6 959/…959х1182+3
Combi HC-EX6 1089/…1089х1314+3
MOUNTING OPTIONS

Serial installation of several heat exchangers on counter-flow basis increases the heat recovery efficiency.

TECHNICAL MAINTENANCE

• The HU-EX6/HC-EX6/Combi HC-EX6 counter-flow heat exchangers have no movable parts and metal connections, therefore no mechanical maintenance is required. Slight contaminations are eliminated by compressed air jets or flushing with warm mild detergent solutions.

OPERATION CONDITIONS
  • The applied materials enable operation, storage and transportation of the heat exchangers in the temperature conditions from -25 up to +50 °C.
  • Storage of heat exchangers in an exposed position in direct sunlight is forbidden.
  • In winter season the air humidity is condensed on the heat recovery plates and the condensed water freezes at the temperature of -5 °C and lower. Heat recovery efficiency during these temperature conditions is slim to zero.
  • Avoid condensate freezing on the heat exchanger plates.
MODEL LINE
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
HU-EX6 366366366 100…6002/2.1
НС-ЕХ6 366366366100…6002/2.1
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
HU-EX6 172397172100…6001/1.1
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
HU-EX6 230445230100…6001/1.1/2/2.1
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
HU-EX6 232461232100…6002/2.1
 
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
HU-EX6 271496271100…6001/1.1
 
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
HU-EX6 312537312100…6003
 
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
HC-EX6 394619394100…6003
 
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
HU-EX6 477700477100…6003
 
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
HC-EX6 533758533100…6003
 
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
Combi HC-EX6 8151040815100…6003
 
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
Combi HC-EX6 9591182959100…6003
 
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
Combi HC-EX6 108913141089100…6003
 
DESIGNATION KEY
HU-EX6 B / C - x
HC-EX6 B / C - x
Combi HC-EX6 B / C - x

HU-EX6: commercial group of monoblocks.
HC-EX6: commercial group of monoblocks.
Combi HC-EX6: commercial group of combiblocks.
B: height [mm]: 366/172/230/232/271/312/394/477/533/815/959/1089
C: depth [mm]: 100…600

x: casing modification:
• 1: aluzinc
• 1.1: aluzinc with a T-profile
• 2: plastic
• 2.1: plastic with a T-profile
• 3: aluminium.

*A: width [mm]: 366/397/455/461/496/537/619/700/758/1040/1182/1314 not indicated in the heat exchanger name.