YD/T 4528-2023
Adaptive dual-cold source computer room temperature control system for information communications (English Version)

Standard No.

YD/T 4528-2023

Language

Chinese, Available in English version

Release Date

2023

Published By

Professional Standard - Post and Telecommunication  CN  /  YD

Latest

YD/T 4528-2023

Introduction

Interpretation of the core content of the standard

YD/T XXXX-2023 standard defines for the first time the three major operating modes of the adaptive dual-cold source computer room temperature control system:

Operation mode	Trigger condition	Energy efficiency ratio requirement	Typical energy saving rate
Compressor cooling mode	Inlet water temperature ≥30℃	≥2.75(Level 3)	Benchmark value
Mixed operation mode	8℃≤Inlet water temperature <30℃	Natural cooling 10+compressor 2.95	35-60%
Natural cooling mode	Inlet water temperature <8℃	≥10(Level 3)	Above 80%

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Key technical requirements

5.3.2 Rated cooling capacity

The system needs to verify its cooling capacity under two standard operating conditions:

• Compressor cooling mode: 28℃ dry bulb temperature condition, cooling capacity ≥ 95% of the nominal value
• Natural cooling mode: 8℃ inlet water temperature condition, cooling capacity ≥ 95% of the nominal value

5.8 Intelligent control requirements

The actual application case of a data center shows that through class=instrument>Three-way valve dynamically adjusts water flow, and the energy saving effect in mixed mode is improved by 12%. The system needs to have:

1. Mode automatic switching response time <3 minutes
2. Compressor start delay protection function
3. Cold source output ratio dynamic algorithm

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Implementation suggestions

Energy efficiency optimization plan

It is recommended to give priority to energy efficiency ratio level 1 products (natural cooling mode ≥14, compressor mode ≥3.15), and the investment recovery period is about 2-3 years.

Installation precautions

• Altitude>1000m requires special design of compressor heat dissipation
• Ethylene glycol solution concentration is recommended to be 30%-40%
• Water system pressure drop is controlled within 150kPa

YD/T 4528-2023 Referenced Document

• GB 50689-2011 Code for design of lightning protection and earthing engineering for telecommunication bureaus(staions)
• GB 8624-2012 Classification for burning behavior of building materials and products
• GB/T 17758-2010 Unitary air conditioners
• GB/T 2829-2002 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
• GB/T 3873 General specifications for products packaging of communication equipments
• GB/T 7778-2017 Number designation and safety classification of refrigerants
• YD/T 1363.1 Communications bureau (station) power supply, air conditioning and environment centralized monitoring and management system Part 1: System technical requirements

YD/T 4528-2023 history

• 2023 YD/T 4528-2023 Adaptive dual-cold source computer room temperature control system for information communications

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