Focus on energy efficiency and water conservation
Hybrid coolers are optimised for water-saving: during colder annual hours, or at partload operation, the cooler is controlled by the Jaeggi HybriMatic ® control to operate dry, ie with convective heat transfer to the ambient air.
Only when the required return water temperature cannot be achieved by dry-cooling is the wetted mode automatically activated. Although the cooler then works through natural, energy-efficient evaporation, it saves 70-90% of annual water consumption as compared to wet cooling towers, and proportionately reduces the associated operating costs.
In multiple cooler installations, the wetting mode is actuated progressively across the coolers as the ambient temperature rises, so that the period of fully evaporative operation is limited to only a few operating hours each year.
Energy consumption is minimised through the use of axial fans with inverter speed
control and electrical motors with class Eff1 energy efficiency.
Jaeggi has continued to develop the patented hybrid dry cooler since 1991 with around 1800 installations in Europe.
The innovative Swiss-engineered high-tech product is successfully used in many diverse applications; such as heat rejection for air conditioning/climate control or in industry to produce cooling water.
Hybrid coolers are available in various sizes for cooling capacities of 100 - 3,500 kW per unit, and are increasingly used to replace installations with wet cooling towers or dry coolers. Contact Martin.Scott@jaeggi-hybrid.ch
Friday, 16 October 2009
Wednesday, 30 September 2009
Wednesday, 17 June 2009
85% Water Saving
Contact Martin.Scott@jaeggi-hybrid.ch
The Leeds Core Centre is another building now benefiting from Jaeggi Hybrid Coolers. Hannan Associates in Manchester specified two hybrid coolers to serve the cooling loop for the VRV systems installed in the individual shop units within the shopping precinct.
The main reasons for installing the Hybrid coolers was the 85% water savings over conventional wet cooling towers with the same cooling efficiencies and the added benefit of the Hybrids using at least 20% less electricity at very low sound levels required because of residential apartments surrounding the Core centre.
Thursday, 2 April 2009
Energy Saving Hybrid Coolers & Condensers
Hybrid Dry Coolers in Refrigeration & Cooling Circuits Introduction
Jaeggi Guentner is a Swiss company manufacturing a hybrid dry cooling system, used extensively in Europe for cooling in refrigeration, air conditioning and process installations.
In the UK, we are now seeing the effect of climate change on the selection of cooling systems where designers seek to resolve the question of achieving lower cooling temperatures (for optimum chiller efficiency and energy saving) whilst designing for higher Summer ambient temperatures.
Hybrid cooling can often be the most valid answer;
• where designers seek to conserve energy and reduce water consumption in response to growing environmental and regulatory pressures (i.e. EPBD and Part L of the Building Regulations).
• where dry coolers or adiabatic spray coolers cannot achieve the desired lower cooling temperatures specified for optimum chiller efficiency and energy saving.
• where cooling towers are not permitted (due to water problems or perceived legionella risk)
Hybrid dry coolers and condensers, developed with the support of the Swiss Energy Commission, have around 1500 installations in Europe since 1991, and are used in the food, dairy, brewing, pharmaceutical and process industries as well as in power plants, commercial buildings, office buildings, banks, airports, hospitals and clinics, research centres and computer centres.
Operating costs for hybrid dry coolers are significantly lower with:
• 30-35% lower energy consumption compared to cooling towers or dry coolers
• 80% less water consumption compared to cooling towers
• low maintenance costs
Description
The Jaeggi hybrid dry cooler is a combination of a dry air cooled heat exchanger during cold and moderate seasons with hybrid dry/evaporative cooling during the hotter summer season. The cooling surface is wetted by adding water to increase the cooling capacity by a factor of 250%.
Compared to a dry aircooled heat exchanger or an adiabatic spray type cooler, this can result in a much smaller installation – thus minimising space requirements, lowering operating weight, reducing foundation loads and reducing building costs, with significantly lower energy consumption.
Compared to a cooling tower, the hybrid dry cooler can achieve the same wet bulb cooling temperatures for optimum energy efficiency. It uses 80% lower annual water consumption and at least 30-35% lower energy consumption. It is designed to eliminate the growth opportunities for legionella bacteria and is designed such that there is no aerosol or water droplet emission, so eliminating the opportunity for bacteriological contamination of the surrounding area. It is also guaranteed visible plume free under any operating conditions and is designed to operate at extremely low noise levels.
It is considered to be a high-tech cooling system that combines the advantages of the closed loop evaporative cooling tower and the dry air-cooled heat exchanger, without any of the disadvantages associated with these other systems. The operating mode depends on the heat load, the air flow rate and the ambient air conditions and is determined by the intelligent control system. The capabilities of modern instrumentation and control technology have been fully utilised making it economical to operate and by this the water consumption can be reduced by 80% and energy consumption by 30-35%, compared to evaporative systems with corresponding operational cost savings.Contact martin.scott@jaeggi-hybrid.ch
Jaeggi Guentner is a Swiss company manufacturing a hybrid dry cooling system, used extensively in Europe for cooling in refrigeration, air conditioning and process installations.
In the UK, we are now seeing the effect of climate change on the selection of cooling systems where designers seek to resolve the question of achieving lower cooling temperatures (for optimum chiller efficiency and energy saving) whilst designing for higher Summer ambient temperatures.
Hybrid cooling can often be the most valid answer;
• where designers seek to conserve energy and reduce water consumption in response to growing environmental and regulatory pressures (i.e. EPBD and Part L of the Building Regulations).
• where dry coolers or adiabatic spray coolers cannot achieve the desired lower cooling temperatures specified for optimum chiller efficiency and energy saving.
• where cooling towers are not permitted (due to water problems or perceived legionella risk)
Hybrid dry coolers and condensers, developed with the support of the Swiss Energy Commission, have around 1500 installations in Europe since 1991, and are used in the food, dairy, brewing, pharmaceutical and process industries as well as in power plants, commercial buildings, office buildings, banks, airports, hospitals and clinics, research centres and computer centres.
Operating costs for hybrid dry coolers are significantly lower with:
• 30-35% lower energy consumption compared to cooling towers or dry coolers
• 80% less water consumption compared to cooling towers
• low maintenance costs
Description
The Jaeggi hybrid dry cooler is a combination of a dry air cooled heat exchanger during cold and moderate seasons with hybrid dry/evaporative cooling during the hotter summer season. The cooling surface is wetted by adding water to increase the cooling capacity by a factor of 250%.
Compared to a dry aircooled heat exchanger or an adiabatic spray type cooler, this can result in a much smaller installation – thus minimising space requirements, lowering operating weight, reducing foundation loads and reducing building costs, with significantly lower energy consumption.
Compared to a cooling tower, the hybrid dry cooler can achieve the same wet bulb cooling temperatures for optimum energy efficiency. It uses 80% lower annual water consumption and at least 30-35% lower energy consumption. It is designed to eliminate the growth opportunities for legionella bacteria and is designed such that there is no aerosol or water droplet emission, so eliminating the opportunity for bacteriological contamination of the surrounding area. It is also guaranteed visible plume free under any operating conditions and is designed to operate at extremely low noise levels.
It is considered to be a high-tech cooling system that combines the advantages of the closed loop evaporative cooling tower and the dry air-cooled heat exchanger, without any of the disadvantages associated with these other systems. The operating mode depends on the heat load, the air flow rate and the ambient air conditions and is determined by the intelligent control system. The capabilities of modern instrumentation and control technology have been fully utilised making it economical to operate and by this the water consumption can be reduced by 80% and energy consumption by 30-35%, compared to evaporative systems with corresponding operational cost savings.Contact martin.scott@jaeggi-hybrid.ch
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