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| | | ENVIRONMENTALLY FRIENDLY TECHNOLOGY | | | SUPER ABSORPTION | | |
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| | | Speedy digital PID control | | Optimum dilution cycle period can be shortened substantially according to microprocessor monitoring | | |
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| | | The introduction of new digital PID control to the E-model stabilizes the chilled/hot water temperature with high accuracy than the previous C model. It quickly responds to the load fluctuation and supplies stable | | This results in the appropriate dilution cycle operating hours. Graph 6. Dilution cycle (DE) | | |
| | | chilled/hot water temperature. It is suitable for air-conditioning intelligent buildings which require sophisticated control. | | |
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| | | | | | | | | | | | | | | Operation ON signal OFF | | | | | | | | | | | | | | | | | | | Chiller/ ON heater OFF | | | | | | | | | | | | | | | | | | | Cooling water ON pump OFF | | | | | | | | | | | | | | | | | | | Chilled / hot ON water pump OFF | | | | | | | | | | | | | | | | | | | | | | | | | | | | Stop signal | | | Chiller stop | | | | | | | | | | | | | | |
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| | | Control of high temperature generator by solution level contro | | |
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| | | With the new control system, solution flow rate is precisely controlled so getic effect of absorbent pump inverter control. This enables the supply that the solution level of the high temperature generator is maintained at of a more stable temperature for chilled/hot water compared to conven- a certain level. tional models. Frequency of maneuvering has been substantially reduced with the syner- Graph 4. Operating result by speedy PID control (gas-fired) | | |
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| | | 'Continuous operation of E model absorbent pump | | |
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| | | ON OFF 16 | | |
| | | Absorbent pump | | |
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| | | Conventional pump ON-OFF(3 times) | | |
| | | T1: Count the time until generator temperature goes down to 120°C (About 4 to 20 minutes) T2: Decide the time by generator temperature. (About 5 to 10 minutes) | | |
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| | | Conventional | | |
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| | | Chilled water inlet temperature . , . _I_I ^_I_Load change | | |
| | | Temperature (°C) 12 | | |
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| | | Note : 1) Dilution time in cooling operation is minimum 6 minutes to maximum 15 minutes. 2) Dilution time in heater operation is 5 minutes. Unit proper and hot water pump stop in 5 minutes after stop signal is lit. 3) Stop the air conditioning system after complete stop of chiller. | | |
| | | Temperature setting 7°C | | |
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| | | urge system | | |
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| | | The high performance purge system maintains the required operating pressure, preserves the chiller performance characteristics, minimizes chiller maintenance as one purge time operation per season in case there are four(4) seasons. | | |
| | | Saving energy with the inverter | | |
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| | | Balancing the load and flow rate with the absorbent pump's inverter control enables efficient and energy saving operation. As a result, it saves the input energy and electric power consumption, running cost by 5% compared to none-inverter control. | | |
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| | | Steam valve opening control | | |
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| | | Graph 7. Start up chart (NE) Variable(5-30minutes) | | |
| | | Graph 5. Running cost curve Table 4. Test condition | | |
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| | | ■ 15minut.es 30minut.es | | |
| | | Open angle of steam control valve at starting is controlled by means of the three steps, resulting that the excessive amount of steam and also the consumed time to reach the desired level became less than the previous model. Of course, by means of adjusting the open speed of steam control valve at the second step and the third, it is possible to set up to the most suitable condition met to the site auxiliary equipment. | | |
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| | | 140 120 100 80 60 40 20 | | |
| | | Steam consumption | | |
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| | | o CO | | |
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| | | s s °- 9r E ° 2 o | | |
| | | Cooling water inlet temperature Chilled water inlet temperature | | |
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| | | O o E E CD CO CO CO | | |
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| | | Setting 7°C | | |
| | | 0 20 40 60 80 100 | | |
| | | Chilled water outlet temperature | | |
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| | | Cooling load factor(%) | | |
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| | | 5 10 15 20 25 30 35 40 Time(minutes) | | |
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