Sanyo Typical piping diagram DE, General remarks on piping work, Cooling cycle schematic

ENVIRONMENTALLY FRIENDLY TECHNOLOGY

Typical piping diagram (DE)

Figure 32. Typical piping diagram

Air conditioner Expansion tank

					COOLING
					TOWER
	HC	C
				Flue	Water supply
		Chilled / hot	P	T
		water pump
F		(primary)	P T
Chiller / hot			P	T
water pump	By-pass valve		P	T
(secondary)					Air vent
					Tank
Supply		Return			above
				Fuel	1M3
header		header
				Cooling water pump

To drain ditch

T : Thermometer P : Pressure gauge F : Flow meter : Water pump : Strainer : Valve : Valve : Thermostat

In order to prevent freezing up of chilled water when the chiller/heaters get a stop signal, continue the operation of the primary and secondary chilled/hot water pumps and air conditioner during dilution cycle operation of the chiller/heaters.

(about 15 minutes).

General remarks on piping work

SUPER ABSORPTION

Steam-fired chillers

Cooling cycle schematic

Figure 33. Steam-fired chillers

�	2.2		Heat	1.0
Heat sink
				�
		�	�	Steam
	�	Low Temperature�
�			High Temperature�
		Generator
Cooling Water	Condenser		Generator

1.Equipment and parts outside the area surrounded by the broken line are not supplied by SANYO.

2.Refer to the “Dimensions” for pipe connections and diameters.

3.Determine the locations of the chilled/hot water pumps, cooling water pump and expansion tank in due consideration of the pump’s hydrostatic head.

The chiller/heaters should not, as standard condition, be subject to a pressure larger than 784kPa (8 kg/cm2G) at any water headers.

4.Concerning the temperature control of cooling water, refer to the section of “control method of cooling water temperature”.

5.The chilled/hot and cooling water pumps should preferably be provided exclusively for each chiller/heaters.

6.During heating operation, cooling water must be discharged.

7.Provide a thermometer and pressure gauge at the outlet and inlet of the chilled/hot and cooling water pipe connections.

8.Provide an air vent valve in each of the chilled/hot and cooling water lines at a point higher than each header.

9.Lay pipes from the cover of the evaporator, absorber and smoke chamber to the drain ditch.

10.Provide expansion tank in the chilled/hot water line.

11.Provide a bleeder in the cooling water line for control of water quality. 12.There should be a sufficiently large clearance for easy access to the

evaporator, absorber and condenser, to facilitate inspection and cleaning work.

13.Provide heat insulation to the flue, which should be equipped with a damper and condensate drain.

14.Do not connect the flue to the smoke stack of an incinerator. 15.When one flue is used for two or more chiller/heaters, a device

has to be provided to prevent the flow of exhaust gas into the one which is out of operation.

16.The exhaust discharge end of the flue should be kept a sufficiently large distance away from the cooling tower.

17.Provide a draft regulator if the static pressure inside the flue is subject to fluctuations.

18.Fix the rupture disk on the chiller/heaters according to the manual of rupture disk, if necessary.

19.All external water piping with JIS 10k welding flanges are to be provided by the customer.

�
Chilled Water�
�			�
			High Temperature�
			Heat Exchanger
			�
			SteamTrap
�		�		�
				Steam Drain
		Heat Reclaimer
Evaporator
		�
�
	�	Low Temperature�
Absorber		Heat Exchanger
	Cooling Water

Refrigeration capacity 1.2

Conc. solution Int. solution Dil. solution Liq. refrigerant Vap. refrigerant Cooling water Chilled water Steam

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