Zhang Yu — Senior HVAC & EC Fan Applications Engineer | Beijing Hengrui Hongsheng Mechanical

E Experience Field Experience

SINCE 2016 · BEIJING, CHINA

Hengrui Hongsheng — HVAC & EC Fan Applications Engineer

Led AC-to-EC fan replacement projects delivering measured energy savings of up to 69% and 42% on documented case studies.
Engineered fan selections for HVAC & ventilation, data center cooling, industrial cooling, refrigeration and medical equipment customers.

2011 – 2015 · HVAC & VENTILATION MANUFACTURING

HVAC & Ventilation Industry — Applications Engineering

Selected centrifugal, axial, blower and tangential fans for OEM air-handling equipment.
Supported field troubleshooting of airflow, static pressure and acoustics on installed systems.

E Expertise Technical Areas

AC ➜ EC Retrofit E

Legacy AC fan replacement with EC technology: matching airflow and static pressure at reduced power draw, with real measured case data.

EC backward & forward curved centrifugal
EC axial, EC compact axial flow
Plug fans for AHU retrofit (e.g. RadiPac M class)

Data Center Cooling E

Cooling-fan engineering for server rooms and data centers: redundancy, pressure characteristics and fan-curve matching.

Compact fans (80/120/172 mm class)
Blower fans for rack & CRAC units
Energy-efficiency driven fan upgrades

Fan Selection & Engineering E

Technical consulting focused on correct duty-point selection — frame size alone never decides the fan.

Fan laws & speed control (EC and DC PWM)
Acoustics and bearing types
Datasheet verification & cross-reference

Product & application coverage

Fans: Compact · Axial · Centrifugal · Blower · Tangential · Motor · Accessories Drives: AC · DC · EC Industries: HVAC & Ventilation · Data Center Cooling · Industrial Cooling · Refrigeration · Medical · Automation · New Energy · Telecom

A Authoritativeness Authorized Brand & Industry Standing

Recognition is evidenced by the principal brands Hengrui is authorized to distribute and service — each product line I write about is backed by a direct manufacturer relationship.

ebm-papst

ZIEHL-ABEGG

Wistro

Rittal

Delta

SUNON

Rosenberg

Sanyo

FULLTECH

NMB

SODECA

Nicotra Gebhardt

Why this matters A

Authorized distribution means my recommendations are based on primary manufacturer data — curves, datasheets and application notes — not paraphrased second-hand information. That is the verifiable expertise Google’s E-E-A-T guidance looks for in technical content.

Verifiable credentials A

Engineering degree in HVAC / Mechanical Engineering
Professional experience in fan applications and system retrofit
Direct manufacturer training and certification on principal brand lines

E Recent Articles on Hengrui News

1 PUBLISHED

JUL 17 2026 How a Commercial AHU Retrofit Achieved 42% Energy Savings with an EC Fan Wall UpgradeProject Case Studies →

T Trustworthiness Who You Are Dealing With

Company

Beijing Hengrui Hongsheng Electromechanical Equipment Co., Ltd.

Website

en.bjhengrui.com

Email

zhangyu@bjhengrui.cn

Phone

+86 10-62547612

Trust points

HTTPS + HSTS · privacy policy & terms

Editorial policy

Articles cite fan curves, datasheets and real project data; numbers are measured, not estimated.

Common Questions About My Articles

Are the energy-saving figures (69%, 42%) real measured data?

Yes. They come from documented retrofit case studies on this site. Every percentage is tied to a specific project and fan upgrade; when a figure is an estimate we say so explicitly in the article.

Do your recommendations apply outside China?

Fan selection is based on airflow, pressure and electrical data — it is location-independent. We ship and support customers worldwide from Beijing.

Can I ask you questions about my specific fan choice?

Use the site contact form with your operating point (flow, pressure, voltage) and we will respond with a verified selection.

Beijing Hengrui Hongsheng Mechanical