Sanyo DE User Manual download pdf (Page 6)

ENVIRONMENTALLY FRIENDLY TECHNOLOGY SUPER ABSORPTION

Optimum dilution cycle period can be shortened substantially according to microprocessor monitoring

This results in the appropriate dilution cycle operating hours.

Graph 6. Dilution cycle (DE)

Purge system

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.

10 15 20

100

120

140

25 30 35 40

7°C

Temperature (°C)

Setting

Variable

(

5-30minutes

)

15minutes

ex.

Steam consumption

Cooling water inlet temperature

Chilled water inlet temperature

Chilled water outlet temperature

Steam control valve

opening ratio

Steam Consumption ratio (%)

Steam control opening ratio (%)

30minutes

Time

(

minutes

)

Steam valve opening control

Operation

signal

OFF

Chiller /

heater

OFF

Cooling water

pump

OFF

Chilled / hot

water pump

OFF

1 min T 1 1 min T 2

Stop signal Chiller stop

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)

Note :

1) Dilution time in cooling operation is minimum 6 minutes

to maximum 15 minutes.

2) Dilution time in heating 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.

Graph 7. Start up chart (NE)

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 aux-

iliary equipment.

OFF

0 5 10 15 20 25 30 35 40

Time(minutes)

Continuous operation of E model absorbent pump

Load factor 80% Load factor 40%

Conventional

Load change

Chilled water inlet temperature

Chilled water outlet temperature

E model

Absorbent

pump

Conventional pump

ON-OFF(3 times)

Temperature

(°C)

Temperature

setting 7°C

100

20 40 60 80 100

Cooling load factor(%)

Non-inverter

control

E model

Fuel consumption ratio(%)

Load factor(%)

100

Temperature(°C)

1. Chilled water outlet temperature 7°C constant

2. Cooling water inlet temperature

Speedy digital PID control

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

Control of high temperature generator by solution level control

With the new control system, solution flow rate is precisely controlled so

that the solution level of the high temperature generator is maintained at

a certain level.

Frequency of maneuvering has been substantially reduced with the syner-

Saving energy with the inverter

Balancing the load and flow rate with the absorbent pump’s inverter con-

trol 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.

chilled/hot water temperature. It is suitable for air-conditioning intelligent

buildings which require sophisticated control.

getic

effect of absorbent pump inverter control. This enables the supply

of a more

stable temperature for chilled/hot water compared to conven-

tional

models.

Graph 4. Operating result by speedy PID control (gas-fired)

Graph 5. Running cost curve Table 4. Test condition

1 2 3 4 5 6 7 8 9 10 11 ... 49 50

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Sanyo DE User Manual Page 6

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