Case Study: Full-Park Energy-Saving Renovation for Guangdong Auto Parts Manufacturer
Client: Guangdong XX Auto Parts Manufacturing Co., Ltd.
Location: Zhaoqing, Guangdong, China
Industry: Auto parts manufacturing (stamping, CNC, assembly)
Project Type: Workshop cooling + dormitory hot water integrated solution
Completion Date: July 2026
Client Background
A leading auto parts manufacturer with 800+ employees, operating a 15,000㎡ production facility including stamping workshop, CNC machining center, assembly line, and staff dormitory building. The company was facing three critical challenges:
- Skyrocketing electricity costs — summer utility bills exceeded $22,000/month
- High worker turnover — summer workshop temperatures reached 42°C, turnover hit 22%
- Hot water reliability issues — old electric boilers broke down frequently, affecting staff satisfaction
Phase 1: Workshop Cooling System
Before:
- 18 old central AC units installed 8 years ago
- Monthly cooling cost: $11,500
- Uneven cooling — hot zones near stamping presses
- High humidity complaints from QC department (precision measurement issues)
Our Solution: 28 units of Meidebao 10HP vertical evaporative cooling industrial air conditioners
- Stamping workshop (high heat): 14 units with enhanced airflow
- CNC machining center (precision): 8 units with precision temperature control (±0.5°C)
- Assembly & QC: 6 units with standard cooling + humidity control
- AI zoning control system: independent temperature for each zone
- Installation method: floor-standing units around perimeter, no ductwork
- Installation time: 8 days, completed during scheduled maintenance shutdown
Results After 3 Months:
| Metric |
Before |
After |
Improvement |
| Workshop temperature |
38-42°C |
26-29°C |
-12°C average |
| Monthly electricity |
$11,500 |
$4,900 |
-57% saving |
| Worker turnover (summer) |
22% |
8% |
-64% reduction |
| Precision scrap rate |
3.2% |
1.5% |
-53% reduction |
| Maintenance frequency |
Monthly |
Quarterly |
-75% less |
Phase 2: Dormitory Hot Water System
Before:
- 10 electric boilers (120kW total)
- Monthly hot water cost: $7,800
- 3-4 breakdowns per year
- Inconsistent water temperature during peak hours (7-9 AM, 8-10 PM)
Our Solution: 8 units of Meidebao 20HP commercial circulating air source heat pumps + 40-ton insulated water tank
- EVI compressor technology: stable heating even on cold winter days
- Parallel modular design: redundancy — if one unit needs service, others keep running
- Smart timing system: heats during off-peak electricity hours (10 PM - 6 AM) for maximum savings
- Constant temperature output: 50°C ± 1°C, 24/7 reliable supply
- Remote monitoring: facility manager can check status from phone
Results After 3 Months:
| Metric |
Before |
After |
Improvement |
| Monthly hot water cost |
$7,800 |
$1,950 |
-75% saving |
| Breakdowns per year |
3-4 |
0 |
100% reliable |
| Peak hour water temp |
Fluctuates 38-48°C |
Stable 50°C |
Consistent |
| Staff complaints/month |
15-20 |
0-2 |
-90% reduction |
Total Project Summary
| Item |
Annual Cost Before |
Annual Cost After |
Annual Saving |
| Workshop cooling |
$138,000 |
$58,800 |
$79,200 |
| Dormitory hot water |
$93,600 |
$23,400 |
$70,200 |
| Maintenance & repairs |
$18,000 |
$5,000 |
$13,000 |
| Total |
$249,600 |
$87,200 |
$162,400 |
Total project investment: $318,000
Annual savings: $162,400
Investment payback period: 1.96 years
Estimated 10-year total savings: $1,306,000
Client Testimonial
"We evaluated five different suppliers before choosing Meidebao. What sold us was their ability to handle both our cooling and hot water needs with one integrated solution. The results have exceeded our expectations — we're saving over $13,000 every month, and our workers are much happier. The payback will be even faster than they projected."
— Factory General Manager
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