Energy efficiency certification for low-temperature evaporation equipment (primarily heat pump and MVR types) centres on a three-tier system comprising energy efficiency standards, energy-saving certification, and industry regulations. The following authoritative standards and metrics are directly applicable for equipment selection, tender documentation, and acceptance inspections.

I. Core National Energy Efficiency Standards (Mandatory / Recommended)

1. General Energy Efficiency Foundation Standard (Heat Pump-Based Low-Temperature Evaporation)

GB 19577-2024 ‘Energy Efficiency Limit Values and Grades for Heat Pumps and Chillers’ (Effective 01/02/2025) Shaanxi Market Regulation Bureau

Applicable to: Heat pump-type low-temperature evaporators (HPE), MVR evaporators (heat pump/vapor compression types)

Energy Efficiency Grades: Grade 1 (highest), Grade 2, Grade 3 (entry level)

Core Metrics: COP (Coefficient of Performance), IPLV (Integrated Partial Load Value)

Determination: Measured value ≥ nominal value and ≥ corresponding grade threshold

2. Specialised Energy Efficiency Standards for Environmental Protection Equipment (Low-Temperature Wastewater Evaporation)

GB 30253 Technical Requirements for Environmental Protection Products - Wastewater Evaporators (Current)

Applicable to: Industrial wastewater low-temperature evaporators, MVR evaporators, multi-effect evaporators

Core Energy Efficiency Indicators (directly incorporated into the scheme):

Energy consumption per unit water evaporated (electricity consumption):

Heat pump type (HPE): ≤0.4–0.6 kW·h/m³ (Grade 1 energy efficiency)

MVR type: ≤0.3–0.5 kW·h/m³ (Class I Energy Efficiency)

Steam Energy Consumption (Multi-Effect / Conventional):

Single-Effect: ≥0.8 kg steam/kg water evaporated

Double-Effect: ≥0.45 kg steam/kg water evaporated

Triple-Effect: ≥0.3 kg steam/kg water evaporated

Energy Conservation Requirement: Heat Utilisation Rate ≥85% (Class I Energy Efficiency)

3. Supplementary Industry / Local Standards

HJ 2015-2012 Technical Guidelines for Industrial Wastewater Treatment: Low-temperature evaporation systems with water recovery rate ≥90% and concentration reduction ≥90% are deemed energy-efficient

T/WZSJD 2401-2024 Complete Equipment for Continuous Extraction and Concentration Using Low-Temperature Low-Carbon Heat Pumps: Heat pump evaporation COP ≥ 3.5, energy consumption ≤ 0.5 kW·h/m³

II. Energy Efficiency Certification System (Mandatory for Tendering/Acceptance)

1. China Energy Efficiency Certification (Official Authority)

Certification Bodies: China Quality Certification Centre (CQC), ZhongBiao Energy Efficiency Technology (Beijing) Co., Ltd.

Certification Basis: GB 30253, GB 19577, GB/T 28742, etc.

Certificate Value:

Inclusion in the National Energy-Saving Product Catalogue, eligible for energy-saving subsidies and tax incentives

Essential qualification for environmental acceptance, green factory certification, and energy-saving audits

Bid bonus points (typically 3–5 points)

2. CCEP Environmental Product Certification (Dual Recognition for Energy Efficiency + Environmental Protection)

Certification Basis: GB 30253, HJ 2015, GB 16297 (exhaust gases), GB 12348 (noise)

Core Energy Efficiency Requirements:

Unit water evaporation energy consumption ≤ 0.6 kW·h/m³ (heat pump / MVR)

Heat utilisation rate ≥ 80%

Water recovery rate ≥ 90%

3. System Certification (Complementary Energy Efficiency)

ISO 50001 Energy Management System Certification: Demonstrates corporate compliance with energy conservation management

ISO 14001 Environmental Management System Certification: Complementary environmental and energy conservation controls

III. Grade 1 Energy Efficiency (Highest Energy Conservation Level) Determination Criteria (Directly Applicable)

Heat Pump Type Low-Temperature Evaporator (HPE) Grade 1 Energy Efficiency

Unit Electricity Consumption: ≤0.4 kWh/m³ (≤400 kWh electricity consumption to evaporate 1 tonne of water)

Coefficient of Performance (COP): ≥4.0 (≥4 kW heat output per 1 kW electricity input)

Thermal Utilisation Efficiency: ≥90%

Water Recovery Rate: ≥95%

MVR Low-Temperature Evaporator Grade 1 Energy Efficiency

Unit Electricity Consumption: ≤0.3 kWh/m³ (Evaporation of 1 tonne water ≤ 300 kWh)

Thermal utilisation rate: ≥92%

Concentration ratio: ≥20 times (Wastewater reduction ≥95%)

Multi-effect Low-temperature Evaporator Grade 1 Energy Efficiency

Steam consumption per unit: ≤0.25 kg steam/kg water evaporated (Three-effect and above)

Thermal utilisation rate: ≥88%

IV. Key Points for Energy Efficiency Certification Application and Verification (Avoiding Pitfalls)