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ADVANCED ABSORPTION CHILLERS UTILIZATION OF VARIOUS HEAT ENERGIES FOR AIRCONDITIONING parti 1

ADVANCED ABSORPTION CHILLERS 
UTILIZATION OF VARIOUS HEAT ENERGIES FOR AIRCONDITIONING
parti 1

Steam Fired Absorption Chiller-Heater – CH-KGST series



Summary:

One of significant feature of absorption cooling technology is that variousthermal energies can be used for air-conditioning by the technology. The main types of thermal energy are hot water, steam, and exhaust gas. In this document, Yazaki’s  advanced absorption chillers and systems are introduced for effective usages not only waste thermal energies but also renewable energies.
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1. Utilization of Various Waste Thermal Energies:

By an onsite electrical generator and manufacturing process of factory, various types of thermal energy are discharged, such as hot water, steam, and exhaust gas. Absorption chiller can use not only fossil fuel but also the wastethermal energies for cooling. In combination with an electrical generator and an  absorption chiller, the combined system can improve overall efficiency rate by using the waste thermal energy for cooling. For effective utilization of energy, Yazaki provides absorption chillers for each type of thermal energy.

Type of Waste Heat and Absorption Chillers

2. For Utilization of Hot Water:

Hot water Fired Chiller (WFC) is the first type of chiller for utilizing waste heat.The WFC absorption cycle is energized by hot water and the lower side operational temperature range of hot water is expanded to 70 degree C for effective utilization of the thermal energy.



Co-generation System with WFC-SCB or WFC-SHB

In general, if the hot water temperature is not enough to operate the WFC, additional boiler is installed into the system to produce an increase in temperature. WFC-SCB and WFC SHB series are the packaged type of auxiliary boiler. By optimal control of auxiliary boiler and WFC, waste energy of hot water can be used effectively.

3. For Utilization of Steam:

CH-KGST can use wasted steam for cooling. In the case of high-pressure steam, the CH-KGST operates double effect cooling cycle. If the steam pressure decreases, the CH-KGST cooling cycle switch to single effect cooling cycle. By the cycle switching control, CH-KGST series can operate continuously under steam  pressure fluctuation from 98 kPa to 686 kPa and realizes effective use of lowpressure steam.
Steam Fired Absorption Chiller-Heater – CH-KGST series


4. For Utilization of Exhaust Gas from MGT:
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CH-KE series can use exhaust gas from MGT directly. The exhaust gas thermal energy retrieved by exhaust heat exchanger and exhaust heat retriever to achieve high efficiency operation. Exhaust gas operation takes priority whenever there is sufficient exhaust heat available in respect of the cooling or heating load. When exhaust gas mode as a function of electrical demand is not sufficient to satisfy cooling or heating requirement, dual fuel mode, exhaust gas and natural gas, will automatically commence. 100% direct gas fired mode will cater for cooling or heating demand when there is little or no heat available from the micro gas turbine.

Reference Image of Exhaust gas Operation Priority


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