GB/T 45477-2025 Oil free centrifugal water chilling (heat pump) packages English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS 27.200
CCS J 73
National Standard of the People's Republic of China
GB/T 45477-2025
Oil free centrifugal water chilling (heat pump) packages
无油悬浮离心式冷水(热泵)机组
(English Translation)
Issue date: 2025-03-28 Implementation date: 2025-10-01
Issued by the State Administration for Market Regulation
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Types and parameter
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transportation and storage
Oil free centrifugal water chilling ( heat pump ) packages
1 Scope
This document specifies the types and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of bucket rock loaders.
This document applies to centrifugal vapor compression circulating cold water (heat pump) units using magnetic suspension bearings, air suspension bearings and refrigerant lubricated bearings.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 2894-2008 Safety signs and guideline for the use
GB/T 4706.32-2024 Safety of household and similar electrical appliances - Part 32: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
GB/T 9237 Refrigerating systems and heat pumps - Safety and environmental requirements
GB/T 10870-2014 The methods of performance test for water chilling (heat pump) packages using the vaper compression cycle
GB/T 13306 Plates
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 18430.1-2024 Water chilling (heat pump) packages using the vapor compression cycle - Part 1: Water chilling (heat pump) packages for industrial & commercial and similar applications
GB/T 19409 water-source（ground-source） heat pumps
JB/T 7249 Refrigeration and air conditioning apparatus - Terminology
GB/T 47012-2020 Pressure vessels for refrigerant device
3 Terms and definitions
The terms and definitions defined in GB/T 7249, GB/T 18430.1-2020, and GB/T 19409, as well as the following, apply to this document.
3.1
oil free centrifugal water chilling (heat pump) packages
centrifugal vapor compression cycle water chillers (heat pumps) employing magnetic bearings, gas bearings, or refrigerant-lubricated bearings
Note 1: Magnetic bearings levitate and dynamically stabilize a rotor using magnetic attraction or repulsion.
Note 2: aerostatic bearing is a sliding bearing that uses air and refrigerant vapor (which may also be other gases) as lubricants. It is divided into two types: hydrostatic air suspension bearing and dynamic air suspension bearing.
Note 3: A refrigerant lubrication bearing is a rolling bearing or a plain bearing that uses a refrigerant liquid as a lubricant.
3.2
pressure ratio
ratio of absolute discharge pressure to absolute suction pressure across a compressor
3.3
quick starting
unit capable of automatically restarting after a brief power interruption to both motor and control power
3.4
temperature inversion differential running
operating condition of a unit when condenser water temperature or ambient temperature is lower than evaporator water temperature
3.5
surging
unstable phenomenon in compressor or compressor unit operation characterized by significant fluctuations in refrigerant vapor flow over time and accompanied by severe vibration and noise
4 Types and parameter
4.1 Types
For the purposes of this document, the terms and definitions given in GB/T-2024 and GB/T 19409 and the following apply.
Note: GB/T 18430.1-2024, 4.1.4 is not applicable to this document.
4.1.2 According to the suspension type of the compressor shaft of the unit, it can be divided into the following types
——Magnetic levitation type.
——Air suspension type:
Static pressure air floating type;
Dynamic pressure air floating type.
——Refrigerant lubrication type:
Positive pressure liquid floating type;
Negative pressure liquid float type.
4.1.3 According to the medium on the heat source side during refrigeration operation of the unit, it is divided into:
——Water-cooled type;
——air-cooled type;
——evaporative cooling type;
——Water (ground) source type.
4.2 Motor Model
The compilation method of the unit model can be determined by the manufacturer himself, but the model should reflect the refrigeration capacity of the unit under nominal working conditions.
Note: The nominal refrigeration capacity may be an approximation of the nominal refrigeration capacity.
4.3 Parameter
4.3.1 Standard operating conditions for general performance tests
4.3.2 Working conditions of partial load performance test
For water-cooled or evaporative-cooled comfort units, the standard working conditions [for comprehensive partial load performance coefficient (IPLV)] and operating conditions [for non-standard comprehensive partial load performance coefficient (NPLV)] of partial load performance test are as shown in Table 7.
Before the test, the water temperature should be corrected according to the method in Appendix B of GB/T 18430.1-2024 and the fouling coefficient given in Table 7, and the test conditions should be set with the corrected temperature.
4.3.3 Standard working conditions for seasonal performance test
The cooling seasonal performance test conditions of air-cooled comfort units are as specified in Table 8.
The annual comprehensive refrigeration performance test conditions of data center dedicated units are as specified in Table 9.
4.3.4 Annual comprehensive performance test conditions
The annual comprehensive performance test conditions of water (ground) source comfort units are as specified in Table 10.
