GB/T 18362-2008Direct-fired lithium bromide absorption water chiller (heater) (English PDF)

4.1.1 Classification by usage performance

a) Cooling-only type: The direct-fired unit which only supplies cold-water.

b) Cooling & heating type: The direct-fired unit which alternatively or simultaneously supplies cold-water and warm-water.

4.1.2 Classification by fuel

a) Gas type: A unit that uses artificial gas, liquefied petroleum gas, natural gas, other gaseous fuels.

b) Fuel type: A unit that uses liquid fuel such as light diesel oil or heavy diesel oil.

4.2 Basic parameters power consumption.

5.3.5 The measured coefficient of performance of the unit shall not be less than 95% of the nominal coefficient of performance.

5.3.6 The pressure drop of cold (hot) water and cooling-water of the unit shall not exceed 110% of the rated pressure drop.

5.3.7 The leakage rate of the unit shall not exceed

5.3.8 The pipeline at water-side of the unit shall be free from abnormal deformation or water leakage.

5.3.9 The noise of the unit shall comply with environmental protection regulations and design requirements.

5.3.10 The safety performance of the unit: the pressure resistance, airtightness, insulation resistance, withstanding voltage strength, electromagnetic compatibility, performance of the combustion equipment, the action of the safety protection device of the fuel piping system shall comply with the requirements of GB 18361-2001.

5.3.11 The cooling (heating) capacity control device of the unit shall be sensitive and reliable. Partial load characteristics are in accordance with Table 4. Table 4 -- Partial load characteristics of direct-fired unit Cold (hot) water Cooling-water Cooling conditions Outlet temperature 7 °C Flowrate same as rated flowrate Inlet temperature: 30 °C at 100% load, 22 °C at 0% load, intermediate temperature changes linearly with load. Flowrate same as rated flowrate Heating conditions Outlet temperature 60 °C Flowrate same as rated flowrate

Note: Partial load performance data (cooling capacity, heating capacity, heat-source consumption) are expressed as a percentage of the load performance data under nominal conditions.

6.1.1 Power supply: The rated frequency ±

1 Hz. The rated voltage ± 10%.

6.1.2 Cold-water: The outlet temperature is 7 °C ± 0.3 °C. The flowrate is ± 5% of the nominal value.

6.3.6 Pressure loss at water-side When the value of the cooling capacity is stable in the test of

6.3.1 and the value of the heating capacity is stable in the test of 6.3.2, use the method and formula as shown in Appendix C to calculate the pressure loss at the cold-water side, the cooling-water side, or the warm-water side.

6.3.7 Airtightness of chiller After passing the leak testing by the use of dry clean air or nitrogen foaming as well as the pressure holding test, use the helium mass spectrometer for leak detection:

a) Connect the unit to the helium mass spectrometer and the supporting vacuum pump. After vacuuming to the required vacuum level of the helium mass spectrometer, directly spray the helium gas on the unit's possible leaks (welds, seals, etc.), use the helium mass spectrometer to make partial leak detection of the unit;

b) Place the unit in the hood, connect the helium mass spectrometer to the supporting vacuum pump. After vacuuming to the required vacuum level of the helium mass spectrometer, turn off the supporting vacuum pump. Fill helium gas in the gas hood. Use the helium mass spectrometer to detect the overall leak rate of the unit.

6.3.8 Pressure resistance at water-side Use a clean water of not less than 5 °C to empty the air from the water-side, to carry out pressure resistance test. The test pressure is

1.25 times the design pressure. Apply the pressure for more than 10 minutes. Carry out inspection. The results shall comply with the provisions of 5.3.8. After completing the test, empty the water and blow it dry.

6.3.9 Noise When the value of the cooling capacity is stable in the test of 6.3.1, use the method of JB/T 4330-1999 to determine and calculate the noise of unit.

6.3.10 Safety performance The test of pressure resistance, airtightness, insulation resistance, withstanding voltage strength, electromagnetic compatibility, performance of combustion equipment, action of safety protection devices of the fuel piping system shall be carried out in accordance with the method as specified in GB 18361-2001.

6.3.11 Partial load characteristics

a) Proportional control

e) Date of manufacture.

8.1.2 The relevant parts of the unit shall be marked with signs of operation status (such as direction change, flow direction, etc.). For places that are prone to human injury (such as high-temperatures, etc.), it shall be attached with a prominent safety mark.

8.1.3 Units which are exit-factory with filled absorbent liquid shall be clearly marked.

8.2 Packaging

8.2.1 The unit shall take anti-rust measures. Randomly exit-factory parts shall be rust-proof and fixed in the packaging box.

8.2.2 If the unit is exit-factory as a whole, it shall be filled with

0.01 MPa ~

0.03 MPa of nitrogen or kept under vacuum before packaging.

8.2.3 The following documents shall be included in the exit-factory packaging of each unit:

8.2.3.1 Product certification.

8.2.3.2 Instructions for installation and use. The content shall meet the requirements of GB 9969.1-1998, including:

a) Signage content and other technical parameters (pressure loss at water- side, geometric size, solution filling volume, operating mass, etc.);

b) Instructions, requirements and precautions for product transportation, storage, installation;

c) Precautions for use and maintenance instructions. Its contents are as shown in Appendix D.

8.2.3.3 Packing list.

8.3 Transportation and storage

8.3.1 During transportation and storage of the unit, it shall take the anti-rust measures. It shall be stored in covered areas.

8.3.2 The valve connecting the unit to the atmosphere shall not be easily opened.

8.3.3 The exposed threaded joint of the unit is plugged by bolts and the flange holes are covered with blind plates, to prevent debris from entering. A.4.1 The unit to be tested has installed the auxiliary device as necessary for operation, the air in the water pipe of the test device has been exhausted, meanwhile it is confirmed that it has been filled with water. A.4.2 The unit to be tested has been filled with the specified amount of lithium bromide solution and additives; meanwhile it is pumped to the vacuum level as required for operation. A.5 Test conditions The test conditions are in accordance with

6.1 of this standard. A.6 Test essentials A.6.1 After reaching to and stabilizing at the status of the test conditions, carry out test. A.6.2 The test of each data at the same time shall be carried out simultaneously, to reduce the impact of fluctuations in test conditions. A.6.3 Carry out test every 15 minutes, take the average of the data that meets the test conditions three times or more in succession as the calculation basis. A.6.4 The data for each test shall be checked by thermal equilibrium method; the deviation shall be within ± 5%. A.7 Test record A.7.1 Evaporator (in case of cooling)

a) Cold-water inlet temperature, °C;

b) Cold-water outlet temperature, °C;

c) Cold-water flowrate, m3/h. A.7.2 Evaporator, absorber, condenser, warm-water exchanger (in case of heating)

a) Warm-water inlet temperature, °C;

b) Warm-water outlet temperature, °C;

c) Warm-water flowrate, m3/h. A.7.3 Absorber, condenser (heat gain in case of cooling)

a) Cooling-water inlet temperature, °C;