How is COP of absorption chiller calculated?
The COP can be thought of as a sort of index of the efficiency of the machine. It is calculated by dividing the cooling output by the 299 Page 2 required heat input. For example, a 500-ton absorption chiller operating at a COP of 0.70 would require: (500 x 12,000 Btu/h) divided by 0.70 = 8,571,429 Btu/h heat input.
Does an absorption chiller need a cooling tower?
The absorption process is exothermic (i.e., it generates heat), and heat must be rejected from the absorber to the condenser water and cooling tower loop. Because of this additional heat rejection load, absorption chillers require a larger cooling tower compared to a mechanical chiller with the same capacity.
Why do absorption chillers fail?
A basic air leak, once stopped, prevents more oxygen from getting into the aqueous system. The corrosion process merely stops by itself. Since the absorption chiller is very dependent upon its internal vacuum being maintained, loss of vacuum from an air leak will cause system failure.
How does absorption chiller work?
In short, the absorption chiller chills water via sudden change of pressure. When the water heats up in the generator, the air pressure is high. Water releases the heat and becomes vapor. Then, a pipe leads the vapor to the evaporator, where the air pressure is low.
What is COP in chiller?
Calculating the efficiency of a chiller is fairly simple. It is measured in “COP” which stands for Coefficient Of Performance. The Coefficient of performance is just a ratio of the refrigeration effect produced by the chiller against the amount of electrical energy that went into the machine to produce this.
How efficient are absorption chillers?
Looking at Graph 1, all three types of absorption chillers are most efficient at 50% part load with the single-effect indirect-fired chiller having a 9.4% increase in efficiency; the double-effect direct-fired chiller having a 10% increase in efficiency; and the double-effect indirect-fired chiller having a 16.7% …
What is the disadvantage to installing an absorption unit?
Two basic disadvantages of absorption chillers are their size – weight, as well as their requirement for larger cooling towers. Absorption chillers are larger and heavier compared to electric chillers of the same capacity.
Where are absorption chillers used?
Absorption chillers are therefore used mostly for large installations when electricity is limited and/or heat is abundant. Absorption chillers can be used for both heating and cooling purposes simultaneously, by using the process cooling water from the absorber and the condenser.
What is absorption chiller in HVAC system?
The absorption chiller uses hot (waste) cooling water from the diesel engines – normally disposed of over board – to produce chilled water serving the HVAC installation. As absorption chillers use heat to drive the refrigeration cycle, they only consume a small amount of electricity to run the pumps on the unit.
What is EER and COP?
What is COP and EER? COP is a measurement of the energy efficiency of your air-conditioning unit’s heating performance. EER is the ratio of a unit’s cooling output relative to its input power. In simple terms, the higher the COP and EER, the more energy efficient the equipment is.
How is COP calculated?
COP (Coefficient of Performance) For example: A given heat pump used for air cooling has a COP = 2. This means that 2 kW of cooling power is achieved for each kW of power consumed by the pump’s compressor. Therefore, the produced heat and the supplied power employ the same units during COP calculation.
Who makes absorption chillers?
Absorption cooling and heating technology acquired by Johnson Controls has served the global market since the 1960s.
How long has Trane been making absorption chillers?
History of Trane Absorption Chillers Trane has been the leader in absorption chiller design and manufacturing for 40 years. Dedicated to the advancement of absorption chiller technology, Trane is the only North American chiller manufacturer to commercialize double effect absorption over 25 years ago.
Why choose Trane chills?
Trane has been the leader in absorption chiller design and manufacturing for 40 years. Dedicated to the advancement of absorption chiller technology, Trane is the only North American chiller manufacturer to commercialize double effect absorption over 25 years ago.
What is Trane horizon ABSD chiller?
The Trane Horizon™Model ABSD chiller is a complete single effect steam or hot water fired absorption chiller package built in an ISO 9001 environment. Chiller consists of generator/condenser section, evaporator/absorber section, controls, pumps, heat exchanger, and energy control valve.
What is the COP of an absorption water chiller?
For an absorption water chiller, it is defined as the ratio of evaporator cooling capacity divided by the heat energy required by the generator, excluding the el ectrical energy needed to operate the pumps, purge, and controls. A higher COP designates a higher efficiency.