The GSWT® system is a highly efficient heat and cold recovery system in a closed-loop system for all air-conditioning and ventilation systems.

In the standard configuration (GSWT®-S systems), these systems can be combined with natural cooling systems such as indirect adiabatic evaporative cooling (IAVK) or free cooling (FK).

• System exchange efficiencies Φ 68 - 73%.
• A water glycol circuit transfers heat or cold from the exhaust air to the outside air
• germ and pollutant transfer free
• Preheating for active frost protection (tZU = 12..16°C) (no control of supply air temperature)
• if necessary combined with CFC-free natural cooling systems
• Cold recovery, reduces aftercooling capacity by 2.4 - 3.9 kW/1,000 m3/h at high outdoor temperatures
• Free cooling, generates cold without chiller for internal cooling purposes.
  Example:
  Outside air 10 °C, chilled water 19/16 °C, cooling capacity 2.1 kW/1,000 m3/h
  Coefficient of performance of cooling: 15....> 100!
• Efficiency gradients greater than 1:15 - 1:50.

Range of application:
Heat and cold recovery for all air-conditioning and air-conditioning systems, for simple application or for decentralized air treatment.

Translated with www.DeepL.com/Translator (free version)

The recooling plants equipped with GSWT® technology use the advantages: high degree of exchange, high redundancy and low tendency to fouling.

This results in: low air volumes (sound), high operational reliability and operation even with polluted outside air.

The GSWT® recoolers are offered in three variants:

• Glycol recooler without humidification.
• Glycol recooler with humidification, no spraying
• Water recooler with humidification, without glycol addition, with return air bypass (special design with electronic frost protection)

For designs with humidification, the 42nd BImSchV also applies. However, in the case of SEW® , humidification takes place via surface humidifiers, without spraying, and thus no aerosols are produced. This essential difference is not considered in the 42nd BImSchV, whereby the aerosols are carriers of 'Legionella'.

With a suitable composition, it is also possible to humidify with city water, or blended water and correspondingly low water supply costs. No use of chemicals.
Via the special SEW® control, the GSWT® recooling plants get by with low water requirements.

The 2-stage heat exchanger/humidifier circuit gets by with the smallest amount of air, the 2nd stage requires only 2.4 m in length, so that very compact recooling solutions are possible.

The high degrees of exchange make it possible to use cooling and heating sources that were previously unknown as such:

20 °C in summer for cooling
25 °C in winter for heating

In the cooling case, free cooling can be used particularly efficiently, e.g. in GSWT® closed-circuit systems - or the chiller used for this purpose operates with high coefficients of performance of > 7 (e.g. at 16 / 24 °C).

In the case of heating, the last calorie of heat can be used - or a heat pump operates with coefficients of performance of 6, 7 or even 8 - or low-temperature waste heat < 25°C can be used.

In any case, GSWT® room air conditioners lead to a significant increase in efficiency of peripheral systems as well as the entire TGA.

The use for data centers leads to lowest air volumes and maximum electricity savings.

In combination with the GSWT® recooling units, 70 % to 100 % of free cooling can be generated!

Versions

• Air flow rates standard 500 - 9,000 m³/h, more on request
• Units vertical (displacement ventilation)
• Horizontal units with duct connection
• Units as ceiling units
• Heat exchanger with temperature exchange ratio, optionally 60 - 90%
• optionally with heating/cooling switchover
• optionally with fresh air connection
• with / without control
• cooling with 20 °C, heating with 25 °C

The GSWT® system is a highly efficient heat and cold recovery system in a closed-loop system for all air-conditioning and ventilation systems.

The entry into the GSWT® technology succeeds with the B-system. The advantages of the GSWT® technology can be used for small volume flow or low degree of exchange. Simple hydraulics and simple control, but with commissioning on demand.

• System exchange degrees Φ > 68 % - 70 %.
• A water glycol circuit transfers heat or cold from the exhaust air to the outside air
• germ and pollutant transfer free
• Cold recovery, reduces aftercooler capacity by 1....2.3 kW / 1,000 m3/h at high outdoor temperatures
• Efficiency gradients greater than 25 - 28

Range of application:
Heat and cold recovery in small ventilation systems, lower running time, simple requirements, alternative to rotor / plate heat recovery.

The GSWT® system is a highly efficient heat and cold recovery system in a closed-loop system for all air-conditioning and ventilation systems.

In the standard configuration (GSWT®-S systems), these systems can be combined with natural cooling systems such as indirect adiabatic evaporative cooling (IAVK) or free cooling (FK).

• System exchange efficiencies Φ 68 - 73%.
• A water glycol circuit transfers heat or cold from the exhaust air to the outside air
• germ and pollutant transfer free
• Preheating for active frost protection (tZU = 12..16°C) (no control of supply air temperature)
• if necessary combined with CFC-free natural cooling systems
• Cold recovery, reduces aftercooling capacity by 2.4 - 3.9 kW/1,000 m3/h at high outdoor temperatures
• Free cooling, generates cold without chiller for internal cooling purposes.
  Example:
  Outside air 10 °C, chilled water 19/16 °C, cooling capacity 2.1 kW/1,000 m3/h
  Coefficient of performance of cooling: 15....> 100!
• Efficiency gradients greater than 1:15 - 1:50.

Range of application:
Heat and cold recovery for all air-conditioning and air-conditioning systems, for simple application or for decentralized air treatment.

Translated with www.DeepL.com/Translator (free version)

The recooling plants equipped with GSWT® technology use the advantages: high degree of exchange, high redundancy and low tendency to fouling.

This results in: low air volumes (sound), high operational reliability and operation even with polluted outside air.

The GSWT® recoolers are offered in three variants:

• Glycol recooler without humidification.
• Glycol recooler with humidification, no spraying
• Water recooler with humidification, without glycol addition, with return air bypass (special design with electronic frost protection)

For designs with humidification, the 42nd BImSchV also applies. However, in the case of SEW® , humidification takes place via surface humidifiers, without spraying, and thus no aerosols are produced. This essential difference is not considered in the 42nd BImSchV, whereby the aerosols are carriers of 'Legionella'.

With a suitable composition, it is also possible to humidify with city water, or blended water and correspondingly low water supply costs. No use of chemicals.
Via the special SEW® control, the GSWT® recooling plants get by with low water requirements.

The 2-stage heat exchanger/humidifier circuit gets by with the smallest amount of air, the 2nd stage requires only 2.4 m in length, so that very compact recooling solutions are possible.

The high degrees of exchange make it possible to use cooling and heating sources that were previously unknown as such:

20 °C in summer for cooling
25 °C in winter for heating

In the cooling case, free cooling can be used particularly efficiently, e.g. in GSWT® closed-circuit systems - or the chiller used for this purpose operates with high coefficients of performance of > 7 (e.g. at 16 / 24 °C).

In the case of heating, the last calorie of heat can be used - or a heat pump operates with coefficients of performance of 6, 7 or even 8 - or low-temperature waste heat < 25°C can be used.

In any case, GSWT® room air conditioners lead to a significant increase in efficiency of peripheral systems as well as the entire TGA.

The use for data centers leads to lowest air volumes and maximum electricity savings.

In combination with the GSWT® recooling units, 70 % to 100 % of free cooling can be generated!

Versions

• Air flow rates standard 500 - 9,000 m³/h, more on request
• Units vertical (displacement ventilation)
• Horizontal units with duct connection
• Units as ceiling units
• Heat exchanger with temperature exchange ratio, optionally 60 - 90%
• optionally with heating/cooling switchover
• optionally with fresh air connection
• with / without control
• cooling with 20 °C, heating with 25 °C