Our Products
YAZAKI absorption chillers, using water as refrigerant, are today’s best choice in air conditioning. While protecting the environment and reducing energy costs, they also cover basic cooling loads and ease electrical peak demands.
YAZAKI single-effect and double-effect chillers are offered in a wide range of capacities from 17 kW to 700 kW. YAZAKI chillers serve such diverse facilities as hotels, offices, shopping malls, residential homes, hospitals, and small businesses.
With more than 30 years of experience in mass production of absorption chillers, YAZAKI is a leading global supplier of non-CFC based cooling systems. Often referred to as the pioneers of absorption cooling, we have become synonymous with high performance and long term reliability.
How does absorption cooling work
Absorption cooling functions according to two main physical principles:
- Vaporizing water that takes away thermal energy (= generates cooling)
- Lithium bromide (LiBr) as a highly hydrophilic solution absorbs water easily
Diluted LiBr solution is pumped from the Absorber (Abs) to the Generator (Gen) where it is heated to boiling point by the heating medium circulating through the Gen heat exchanger. Refrigerant (water) vapour is liberated from a diluted solution and flows to the Condenser (Con) heat exchanger where it is condensed to a liquid state by rejection of heat to the cooling water circuit.
Due to the partial separation of LiBr-solution and water during boiling in the Gen, the portion of LiBr in the remaining solution increases. This concentrated solution flows from the Gen to the Abs where it will flow over the surface of the Abs exchanger coil.
Since cooling water from the cooling circuit is circulating through the Abs coil, fairly low vapour pressure is created in the common room of the Evaporator (Eva) and Abs due to the high concentration of LiBr solution, and this is the environment that the refrigerant liquid coming from the Con encounters as it flows over the coil into the Eva.
Concentrated solution absorbs refrigerant vapour from the Eva as the liquid refrigerant changes its state to vapour, taking energy from the vaporization of the chilled water circulating through the Eva exchanger. This heat extraction results in the production of chilled water.
The concentrated solution returns to a diluted state as refrigerant vapour is absorbed. In its relatively cool condition, it is collected in the Abs sump and thereafter forced by the solution pump to return to the Gen for boiling again, thus perpetually repeating the cooling cycle.
Single effect absorption cycle animation
- Single effect absorption cycle - click image to open animation
