- YORK®
- Commercial Equipment
- Chilled Water Systems
- Absorption Chillers
- YHAU-CG/CA Double Effect Direct Fired Chiller/Heaters
YHAU-CG/CA Double Effect Direct Fired Chiller/Heaters
120-1,600 TR (422-5,626 kW)
Driven by direct firing of natural gas or light oil, these units provide chilled water and hot water for cooling and heating applications.
- Innovative, two-step evaporator and absorber design combined with parallel flow cycle.
- Suited for natural gas or light oil energy sources
- Variable-frequency drive (VFD) solution pump
Innovative Design for Superior Efficiency
The YORK® YHAU-CG/CA Double-effect, Direct-fired Absorption Chiller offers a broad range of capacities from 120 to 1,600 TR. This unit uses an innovative, two-step evaporator and absorber along with a parallel flow, which enables lower concentrations and minimizes the potential for corrosion and improves efficiency. Our world-class engineering and service organization helps to simplify the chiller operation over the life of the system.
![Innovative Design for Superior Efficiency](https://tyco.widen.net/content/4ufw6t05fy/jpeg/CHI_imageleftcontentright_absorption-chillers_3.jpeg?position=c&color=ffffffff&quality=80&u=txn4yx)
Benefits
![Optimal Efficiency](https://tyco.widen.net/content/rlgmsuzv8q/jpeg/Sitecore%20Web%20Icons_Efficiency.jpeg?position=c&color=ffffffff&quality=80&u=txn4yx)
OPTIMAL EFFICIENCY
Our YHAU-CG/CA Double-effect, Direct-fired Chiller uses an innovative, two-step evaporator and absorber design that enhances efficiency.
![Flexible Design](https://tyco.widen.net/content/ohdqf6zst3/jpeg/Sitecore%20Web%20Icons_Design.jpeg?position=c&color=ffffffff&quality=80&u=txn4yx)
FLEXIBLE DESIGN
Driven by natural gas or light oil energy sources, this unit is suited for a variety of comfort or industrial process cooling applications.
![Lower Cost Of Ownership](https://tyco.widen.net/content/4kkgisyutq/png/Web_Icons_Cost%20Savings.png?w=100&h=100&position=c&color=ffffffff&quality=80&u=ncoxvb)
LOWER COST OF OWNERSHIP
World-class engineering and service teams reduce the cost of ownership by simplifying the operating cycle and deliver worry-free peace of mind.
Features
- Two-step evaporator and absorber design enhances absorption of the refrigerant into the concentrated solution, reducing overall pressure
- Variable-frequency drive (VFD) solution pump provides superior part-load performance to reduce gas/oil consumption versus constant speed pumps
- Control center with graphical, animated, LCD display offers present and past operational status, data recording and chiller safeties accessible at a touch
- Two-step evaporator and absorber design enhances absorption of the refrigerant into the concentrated solution, reducing overall pressure
- Variable-frequency drive (VFD) solution pump provides superior part-load performance to reduce steam consumption versus constant speed pumps
- Control center with graphical, animated, LCD display offers present and past operational status, data recording and chiller safeties accessible at a touch
- Simultaneous cooling and heating operation available.
- Parallel flow cycle enables lower lithium bromide solution concentrations, reducing crystallization risk and the potential for corrosion
- High-temperature generator uses stainless steel tubes to maximize reliability by eliminating stress damage
- Isolation valves on the suction and discharge of the solution and refrigerant pumps allow quick and easy servicing of pumps, which typically have a 60,000-hour life
- Parallel flow cycle enables lower lithium bromide solution concentrations, reducing crystallization risk and the potential for corrosion
- High-temperature generator uses stainless steel tubes to maximize reliability by eliminating stress damage
- Isolation valves on the suction and discharge of the solution and refrigerant pumps allow quick and easy servicing of pumps, which typically have a 60,000-hour life
Two-step Evaporator and Absorber
YORK® YHAU-CG/CA Double-effect, Direct-fired Chillers are uniquely designed with a two-step evaporator that has two pressure levels to divide the absorption process. The chilled water flows in tubes through the two evaporators while a concentrated lithium bromide solution is distilled in the absorber shell-side in the opposite direction. This reduces the solution concentration and overall pressure, making the unit more efficient and reliable than conventional absorption chillers.
See How It Works
![Two step graphic showing a YORK Chilled Water System evaporator and absorber.](/-/media/project/jci-global/york-sites/united-states-york/commercial/images/commercial-landing-page/chilled-water-systems/absorption-chillers/techapp-images/yhau_cg_ch/chi_imageleftcontentright_two-step-evaporator_3_v2.jpg?h=1037&w=1380&la=en&hash=12C5EE9A73B3FF738C9FB49D4C364702)
![Chart showing the parallel flow cycle and two-step design of Absorption Chillers.](/-/media/project/jci-global/york-sites/united-states-york/commercial/images/commercial-landing-page/chilled-water-systems/absorption-chillers/techapp-images/yhau_cg_ch/chi_imageleftcontentright_parallel-flow-cycle_1_v2.jpg?h=1037&w=1380&la=en&hash=76FF8EB8BACF6CC94D76596F97FB19EC)
Parallel Flow Cycle
The parallel flow cycle divides the solution flow between the low temperature and high-temperature generators into two parallel, balanced paths. Combining our two-step and parallel flow design, the unit can achieve a safer and more efficient operation at a much lower pressure than conventional series-flow designs. Thanks to this innovative design, the LiBr concentration is lower. This results in a relatively low grade for the driving heat source, providing a high coefficient of performance (COP).
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Related Products
- Innovative YORK® two-step evaporator and absorber design enhances absorption of the refrigerant into the concentrated solution, reducing overall pressure and risks of crystallization.
- Lower pressure steam into the generator can be used to drive the absorption cycle for higher system efficiency.
- Solution plate heat exchanger optimizes efficiency by enabling effective heat transfer between the diluted and the concentrated lithium-bromide solutions.
- Innovative YORK® two-step evaporator and absorber design enhances absorption of the refrigerant into the concentrated solution, reducing overall pressure
- Lower temperature hot water source into the generator can be used to drive the absorption cycle for higher system efficiency
- Virtually eliminates crystallization risk and reduces the potential for corrosion
- Two-step evaporator and absorber design enhances absorption of the refrigerant into the concentrated solution, reducing overall pressure.
- Parallel flow cycle enables lower lithium bromide solution concentrations, reducing crystallization risk and the potential for corrosion.
- Variable-frequency drive (VFD) solution pump provides superior part-load performance to reduce steam consumption versus constant-speed pumps.