YHAU-CL/CH Single Effect Hot Water YORK Absorption Chiller

The YHAU-CL/CH single-effect absorption chiller’s two-step design provides a wide operating envelope utilizing waste heat as low as 70°C (158°F) where typically competitive offerings cannot operate. YORK® technology provides the flexibility to handle combined heat and power (CHP) systems, comfort or industrial-process cooling applications with outstanding efficiency and reliability.

Areas of application:

• Combined heat and power generation
• Industrial processes
• Cooling

Advantages of a single-stage chiller:

• Maximum performance through design
• Flexible operating range
• Minimising the total cost of ownership

Applications:

 Absorption chillers are widely used in the energy sector as well as in off-grid power supply systems. The use of absorption chillers enables the utilisation of heat from the exhaust gases of power plants - trigeneration. The use of absorption chillers not only makes it possible to utilise the heat from power plant exhausts year-round, but also makes it possible to abandon power generation capacities for the use of conventional vapour compression chillers.

• The outlet temperature of the chilled water is only 1°C.
• The inlet cooling water temperature is up to 37°C.
• Hot water inlet temperature, operating heat source, inlet temperature from 160°C to 70°C.

Refrigerant cycle

The highly efficient single-circuit absorption refrigeration cycle of the YORK YHAU-CL/CH uses water as the refrigerant and lithium bromide as the absorber. The entire absorption process takes place in hermetically sealed vessels under almost complete vacuum.

The two-stage evaporator and absorber design is efficient, reliable and lowers the cost of ownership for the owner. The innovative two-stage evaporator and absorber design is more efficient than a conventional cycle. The innovative design divides the absorption process into two stages, similar to how a series counterflow device divides the work between two chillers.

The design result allows the YHAU-CL/CH to perform the absorption function at lower solution concentrations than traditional designs, increasing efficiency and reliability as well as reducing the cost of use.

What does a reduction in lithium bromide solution concentration in the system give 

• Increased system efficiency
• Reduced temperature of hot water from the source fed to the generator can be used to start the absorption cycle
• Virtually eliminates the risk of crystallisation and reduces the likelihood of corrosion.
• Reduced operating costs
• Can operate with less hot water consumption and reduced pumping energy.

Fully automated cleaning system

The chiller is equipped with a fully automatic purge system as standard. The system, which consists of an electronic vacuum sensor, solenoid valves and trend analysis, ensures the durability of the design and increases its reliability.

The chiller control

YHAU's standard automation ensures maximum efficiency, monitoring, data recording, refrigerant circuit protection and is easy to operate. The LCD display provides a graphical representation of the chiller subsystems and system parameters, allowing multiple operating parameters to be viewed at once.

In addition, the operator can view the chiller's operating history as well as current operations in a schematic view. The panel can also be integrated into a plant or building management system.