Energy Storage Electric Boiler Off-Peak Heat Storage Principle and Cost-Saving Analysis: Calculation of Northeast Peak-Valley Electricity Price Project | Jingyu Thermal Energy
Energy Storage Electric Boiler - Detailed Explanation of Off-Peak Heat Storage Cost-Saving Solution
The energy storage electric boiler (also known as heat storage electric boiler or off-peak electric boiler) is a clean energy heating solution that utilizes the price difference between peak and off-peak electricity rates to achieve energy savings. During the nighttime off-peak period (typically 22:00 to 8:00 the next day), the boiler intensively heats a heat storage water tank; during the daytime peak period (8:00 to 22:00), it prioritizes releasing the stored heat from the water tank for heating or hot water supply, with the electric boiler only providing supplementary heating when heat is insufficient. This shifts electricity consumption from high-price periods to low-price periods, achieving overall cost savings of 30%-50%.
Northeast China Peak-Valley Electricity Pricing Policy (Reference)
| Period | Time Range | Electricity Price (Reference) |
|---|---|---|
| Peak | 18:00-21:00 | ≈1.2 CNY/kWh |
| High | 8:00-11:00, 16:00-18:00, 21:00-23:00 | ≈0.85 CNY/kWh |
| Flat | 7:00-8:00, 11:00-16:00 | ≈0.55 CNY/kWh |
| Valley | 23:00-7:00 (next day) | ≈0.30 CNY/kWh |
Note: Local electricity prices are subject to the latest policies of State Grid/Southern Power Grid.
Energy Storage Electric Boiler System Components
- Electromagnetic Boiler/Electric Boiler Main Unit: High-frequency induction heating, water-electricity separation, fast start-stop response
- Heat Storage Water Tank: Configured based on thermal load and off-peak duration (10-200 tons), with high-density insulation
- Heat Exchange and Mixing System: Plate heat exchanger/mixing device, stable output temperature
- Circulation Pump Set: Three circulation loops for heat storage/heat release/terminal systems, variable frequency control
- PLC Intelligent Control Cabinet: Automatic peak-valley time switching, outdoor temperature compensation, fault alarm, remote monitoring
- Water Make-up, Pressure Stabilization and Safety Components: Water make-up, exhaust, pressure relief, filtration, temperature and pressure monitoring
Cost-Saving Calculation Example
Assume a 10,000 m² office building in Harbin requires heating, with a thermal load index of 50W/m², a total thermal load of 500KW, and a daily heat requirement of approximately 3,000 kWh.
- Non-Storage Solution: All-day electricity consumption × average price ≈ 3,000 × 0.85 = 2,550 CNY/day
- Energy Storage Solution: Nighttime off-peak heat storage 3,000 kWh + small amount of daytime supplementary heating ≈ 3,000 × 0.30 + small supplementary heating ≈ 950 CNY/day
- Daily Cost Savings: Approximately 1,600 CNY/day, with a cost-saving ratio of approximately 62%
- Annual Heating Period Cost Savings: (180 days × 1,600 CNY) ≈ 288,000 CNY
Applicable Project Types
- Schools (off-peak heat storage during summer/winter breaks, all-day hot water supply)
- Hospitals (24-hour hot water + heating, staggered operation)
- Office Buildings (off-peak heat storage at night when unoccupied, continuous heat release during the day)
- Hotels (24-hour hot water + nighttime heating)
- Industrial Parks (daytime production heating, nighttime off-peak heat storage)
- Residential Communities (nighttime off-peak heat storage, all-day heating)
Jingyu Thermal Energy Energy Storage Electric Boiler Project Cases
- Dafeng Technology 120KW Energy Storage Electromagnetic Boiler: Heilongjiang Dafeng Technology Park, electromagnetic + energy storage combination, eco-friendly, energy-saving, intelligent temperature control
- Acheng Funeral Home 500KW Electromagnetic Boiler: Replaces traditional heating, clean, low-carbon, safe and quiet
- Suiling Beishan Township Water Supply Plant 200KW Energy Storage Electromagnetic Boiler: Ensures constant temperature operation of the water supply plant
Free solution design: Phone 18686730186, Email 18686858408@163.com, Address: No. 1 Heifang Road, Acheng District, Harbin City, Heilongjiang Province.