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HIJC
HEAT INTEGRATED JOINT COMPANIS
WASTEHEATADSORPTIONCHILLER
Attempted use of absorption chillers in waste heat applications have been failures.
Now, efficient energy conservation can be achieved by utilizing waste heat to drive an Adsorption Chiller, which can replace an absorption chiller. Waste heat from cogeneration systems (diesel engine, gas engine, gas turbine, or fuel cell) achieves tri-generation. Using the waste heat from various processes, including: food (poultry, dairy products, juice, and breweries), chemical, plastic, rubber, paper and cement can enhance the heat balance of the process. Another source of waste heat are steam boilers, that are used year round in such applications as hospitals and hotels, which can use their waste heat in the summer to cool their facilities. Additionally, the Adsorption Chiller also can tap into nature’s own waste heat such as geothermal and even, the ever varying, solar heat.
The Adsorption Chiller is highly reliable and safe with low operating cost due its simplicity of operation.
The Adsorption Chiller does not contain any Li-Br or other chemical refrigerant which means no crystallization, no corrosion, no chemical testing or hazardous leaks. The Adsorption Chiller also does not have any high voltage motors or large compressors. The control system is self-contained and trouble-free.
No external temperature control valves are required to protect the chiller or for capacity control.
The Adsorption Chiller contains only water as a refrigerant and a proprietary, permanent silica gel (lasts 30 years) as an adsorbent. The evaporator section cools the chilled water by the refrigerant (water) being evaporated by adsorption of the silica gel in one of two adsorbent chambers. It can produce chilled water temperatures of less than 48ºF(9ºC) with hot water temperatures ranging from 194ºF(90ºC) to as low as 122ºF(50ºC). The hot water regenerates the silica gel in the second of the two adsorbent chambers. The water vapor released from the silica gel by the hot water will be condensed in the condenser section which is cooled by a cooling water, such as, from a cooling tower.
ADVANTAGES
►Water used as refrigerant, no freons, no Li-Br, no ammonia means : No hazardous leaks, no corrosion, no chemical testing, no replacement.
►No compressor means: No alignment, no high voltage, no high pressure, no overhaul, no oil change, no surging, no vibration or noise.
►Stable chilled water output driven by a wide range (194ºF(90ºC) to 122ºF(50ºC) of hot water.
►Stable operation, even with the fluctuating hot water temperatures and flow rates that are normal in waste heat recovery applications. No back-up burner required.
►Simple and short start up /stop time
►Constant operation- 24 hours /7 days a week.
Efficient Energy Conservation and Environmentally
Friendly
Adsorption Chillers
The Adsorption Chiller was developed and first produced by Nishiyodo Airconditioning Manufacturing Company in 1986. Since being first produced the Adsorption Chiller has been used and closely evaluated in a wide area of applications in Japan and Europe with sensational response.
EFFICIENT ENERGYUSAGE OF WASTE HEATWITHAC.O.P.=.68 OR.75.
The C.O.P. has been improved by 13% with the introduction of high efficiency heat ex-changers.
Total efficiency ratings of power generation systems can be improved by including the Adsorption Chiller in co-generation or tri-generation applications.
PRODUCES41ºF (or 5ºC) OF CHILLED WATER
Ahighly sensitive temperature sensor in the high efficiency evaporator allows the production of chilled water temperatures of as low as 41ºF
THEADSORPTION CHILLER WAS DESIGNEDFOR CONTINUOUS
heavy industrial process cooling operation 24 hours a day, 7 days a week, the year around.
SIMPLE IN MAINTENANCEAND OPERATION
The Adsorption Chiller is simple in its design. The silica gel and the water are contained in their respective vacuum chambers. The operation of the chiller is very simple, it does not require a skilled operator. Additionally, operation is safe because there is no refrigerants oil or other chemicals used in the system.
Maintenance is very simple and inexpensive. No daily maintenance is required.
THERE IS NO RESTRICTION ON COOLING WATER TEMPERATURE
LIKE AN ABSORPTION CHILLER, THE LOWER THE COOLING
WATERTEMPERATURE THEHIGHERTHECAPACITY.
The recommended range for the hot water is from 194(90) to 149ºF(65ºC). We do not recommend hot water temperatures above 194ºF(90ºC), because of the possibility of the water flashing and surging at the suction of the pump. With hot water temperatures as low as low as 122ºF(50ºC), the C.O.P. will be reduced, but the chiller can still operate.
STABLE CHILLED WATER OUT PUT DRIVEN BYAWIDERANGE (194ºTO 149ºF) OF HOT WATER.
Capacity out-put remains stable even when water, heated with recovered waste heat, drops below the 185 ºF(85ºC) limit of hot water driven absorption chillers.
The Adsorption Chiller is very stable in its cooling operation. It is affected very little by changes in temperatures. For example, as shown on the graph, the C.O.P. vs. hot water temperature shows 0.5 to 0.75 C.O.P. for 158(70) to 212ºF(100ºC) water. This
stability of operation, with varying water temperature allows the Adsorption Chiller to be used effectively with fluctuating waste heat recovery applications.
Presenting ADCM8 Series
Powered with Silica gel HD01
ADCM8Typical Performance Data
ADCM8Typical Carbon Neutral Data
Applications
OUR EXPERIENCES
With Plant Waste Hot Water
History of ADsorption Chillers
NADAseries
Nishiyodo in Japan created a NADA series; Standard fin pitch fin coil adsorbent heat ex-changers packed with RD type granular silica gel without equalization of 2 chambers.
NADACseries
Performance improved around 5% with a by-pass damper to equalize pressure between 2 chambers.
The by-pass damper contains a bellow seal.
ADCM1 series
Improved RD type silica gel is applied to increase packed weight by 10% One body shell construction with 1 condenser, 2
adsorbent chambers, and 1 evaporator. Bypass damper with bellow seal. Water side switching pneumatic butterfly valves.
Canned refrigerant pump Tube sheets construction with water boxes. Small man-ways to observe flappers movement for the
evaporator side.
HIJC USA, Inc obtained the rights of manufacturing of adsorption chillers by Nishiyodo Airconditioning Co.
ADCM3 series
Powder silica gel is coated to adsorbent heat ex changers. low packing density of powder silica gel was noticed.
And the binder clogged adsorbent pores. Solid adsorbents are most preferable and realizing a higher packing density.
ADCM4 series.
Application of smaller fin pitch fin coils for adsorbent heat ex-changers.
ADCM7 series
Several System modification to avoid problems from the previous series, and simplified flow patterns.
2 body shells with 2 condensers, 2Adsorbent chambers, and 2 evaporators.
No flappers in vapor streams, but switching in liquid streams Switching valves are pneumatic valves in vacuum.
Simple control Magnet drive pump
ADCM8series
Merging ADCM1 andADCM7 eliminating problems of ADCM1 and adding advantages of ADCM7.
HIJC USA, Inc.
Houston Texas USA
HIDEKAZU “KURI” KURIHARA
TEL +1-346-575-3060
Succeeded by the original manufacturer in Japan
Nishiyodo Air-conditioning Co.