Refrigerated Water Chiller

Test ability, technical level

1.GRAD has the National Laboratory of Air Conditioning Products recognized by CNAS, which is used for the design, development and experimental research of water-cooled chiller and the factory test of products.

2.Strict factory product quality control, so that users can buy at ease, with satisfaction.

3.GRAD screw type water cooled chiller series products ware tested by the national air conditioning quality testing center, the technical performance indicators are higher than GB/T184330.1-2007"Vapor compression cycle cold water (heat pump) unit Part 1: Industrial or commercial and similar uses of cold water (heat pump) units "standard, product quality is stable, reliable operation, has been praised by the majority of users at home and abroad.

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Product Details

Water Cooled Screw Chiller

Water Cooled Screw Chiller adopts the semi-closed double-screw compressor, and uses the single circuit or multi-circuit design.Its parts are easy to maintain.The protection and control facilities are placed in the control cabinet and the running state of the host is displayed on the computer monitor. All units are assembled in the factory and leave the factory after being operated and debugged. The application scope of this series of the units includes various commercial and civilian building facilities, such as shopping malls, office buildings, commercial buildings, factory workshops, hotels, hospitals and so on.

Refrigerated Water Chiller Features:

1. High efficiency and low noise: it has a higher EER and the COP value can be as much as over 4.6.

2. Reasonable system structure: the unit can be horizontal or vertical which is easy to install.

3. Intelligent regulation: the unit can adjust automatically as per the loading, which can save energy a lot.

4. Good performance and reliable.

Applications:

This unit is mainly used for cooling in summer, which is widely used in comfort central air conditioning system for communal facilities like hotel, shopping mall, office building, exhibition hall, airport, gym etc. Meanwhile, it can meet the various requirements of process air conditioning system for industries like electricity, pharmacy, biology, light textile, metal and mechanical industries etc.

Components

1. Semihermetic screw refrigeration compressor, with simpler structure, even and continuous inlet and exhaust air, small running shock, high stability and long life span.

2. Shell & tube evaporator and condenser

3. Expansion valve: electronic expansion valve control system can meet as much as 2600 steps control precision, which can make the unit keep optimal condition.

4. All the assembly work will be finished in the factory and the unit can be delivered after qualified operation and trial test.

5. Microcomputer control system.

Refrigerated Water Chiller

A partial parameter table of water-cooled screw chiller R22
Unit Model			LSW055	LSW110	LSW180	LSW250	LSW300	LSWD110	LSWD180	LSWD240	LSWD320	LSWD380	LSWD540	LSWF560	LSWF600	LSWF720	LSWF920	LSWF1000
Refrigeration capacity		KW	193	387	630	880	1055	386	634	844	1126	774	1899	1960	2110	253	3240	3517
power supply			3N-50HZ 380V
Starting mode			Y-∆ or shunt winding
Energy control			25%-100%					12.5%-100%						6.25%-100%
Compressor	Type		Semi-closed screw type
	Quantity		1					2						4
	Power input for refrigeration	KW	40.8	82.3	131.3	104.5	215.5	71.6	134	179.6	234.6	278	398.6	418	448	527.1	675	732.7
Condenser	Type		Shell and tube heat exchanger
	Waterside resistance	KPa	40-80
	Connecting pipe specification	DN	80	100	125	150	150	100	150	150	200	200	200	150	150	200	200	200
	Water flow	m3/h	36.8	80.7	130.9	183.7	218.5	78.7	132.1	176.1	234	277.6	395.2	409	440	525.8	673.4	730.9
Evaporator	Type		Shell and tube heat exchanger
	Waterside resistance	KPa	40-80
	Connecting pipe specification	DN	80	100	125	150	150	100	150	150	200	200	200	150	150	200	150	150
	Water flow	m3/h	29.6	66.6	108.4	151.4	181.5	66.4	109	145.2	193.7	229.8	326.7	337	363	168.6	216.7	229.8
Partial heat recovery	Quantity	KW	42	94	152	214	254.1	91.52	153.6	204.7	272.1	322.8	459.5	475.6	511.6	237.8	304.5	322.8
	Waterside resistance	Unit	40-80
	Connecting pipe specification	KW	50	65	80	80	100	65	80	80	100	100	125	100X2	100X2	100X2	125X2	125X2
	Water flow	m3/h	7.1	16.1	26.2	36.7	43.7	15.7	26.4	35.2	46.8	55.5	79	81.8	88	105.2	134.7	146.2

Company Information

GRAD Group devotes itself to be a central air conditioning customization expert around you and provides you a comprehensive energy solution, GRAD possesses national mechanical and electrical equipment installation Class I qualification and purification equipment installation Class II qualification. GRAD has the overall project contacting ability. It has contracted national class and provincial class technology research projects for many times. The accumulated patents for technolog achievements has passed 110 items. There are more than 300 senior engineers available for central air conditioning design and solution. The 700,000 ㎡ manufacturing base includes the whole central air conditioning series: from chiller to terminal products. The high efficient falling film centrifugal chiller maintains domestic leading position and the large fan wall air handling unit has filled domestic blank and been listed in the national torch plan. GRAD has the national class air conditioning testing center and has passed CNAS certification. The products quality can be well guaranteed. Some of projects gained China Construction Project Luban Prize and National High Quality Project. At the same time, GRAD has established more than 30 offices all over China, such as Beijing, Tianjin, Shenyang, Xi’an, Wuhan, Nanjing, etc. The sales, design, installation and after sales network has covered every corner of China. Moreover, its products have been exported to more than 100 countries.

Refrigerated Water Chiller