Heat Exchanger and Thermal System Design & Manufacturing
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Semi-Storage Calorifier
  • Semi-Storage Calorifier
  • Semi-Storage Calorifier
  • Semi-Storage Calorifier
  • Semi-Storage Calorifier
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Semi-Storage Calorifier, Semi-Storage Water Heater

The semi-storage calorifier combines the high heat transfer efficiency of a plate heat exchanger with the high temperature and pressure resistance, as well as thermal storage capability, of a traditional storage heat exchanger. It is widely used in domestic hot water systems, HVAC systems, and industrial heating applications, and is particularly suitable for projects that require stable hot water temperature and large-volume hot water supply during peak demand periods.

High-temperature heating media enters the built-in plate heat exchanger inside the semi-storage calorifier. The efficient plate heat transfer structure rapidly heats the incoming cold water with a low temperature difference. The heated water is then stored inside the insulated tank, which offers 100% utilization of the storage volume. During periods of high demand, such as morning and evening peak usage, the stored hot water is supplied directly to the system to maintain a stable temperature and continuous hot water output.

This operating mode of semi-storage calorifier combines instantaneous heat exchange with thermal storage capacity, which helps the system handle fluctuating hot water demand with stable and reliable performance.

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Features
  • Low Logarithmic Mean Temperature Difference: LMTD ≤ 3°C for efficient heat transfer performance.
  • Hygienic Design with Automatic Disinfection Function: Complies with relevant hygiene requirements and includes an automatic disinfection function.
  • 100% Storage Volume Utilization: The full tank volume is available for hot water storage. Compared with conventional designs, the equipment can achieve the required hot water capacity with a more compact footprint.
  • Built-In Laser-Welded Plate Heat Exchanger: The integrated high-efficiency plate heat exchanger provides effective heat transfer within the storage vessel.
  • Smart Control System: The integrated control panel manages pump operation and water temperature. Data communication with BMS is available.
  • Certified design standards: Designed according to PED 97/23, BS PD5500, DIN4753, GB150, and GB151 standards.
Customization
  • Max. Working Pressure: Up to 25 bar
  • Storage Capacity: 100 L to 15,000 L
  • Materials: Stainless steel 304, 316, 316L, 316Ti, and 444
Specifications
Model Storage Capacity Diameter Width Height Net Weight Heating Capacity (kW) Connection Size (mm)
D W1 W2 H1 H2 10Bar 16Bar  Water-to-water Inlet Outlet Return
L mm mm mm kg Primary side: 80/60℃
Secondary side: 15/60℃		 Flange
IHT 200 500 1070 1210 1330 840 200 230 25 32 32 25
500 650 1220 1720 1850 990 230 270 60 40 40 25
750 750 750 1920 2040 1090 280 310 80 50 50 25
800 800 800 1820 1940 1140 295 350 90 50 50 25
1000 900 900 1820 1935 1240 345 430 110 50 50 25
1500 1000 1000 2170 2290 1340 430 520 160 50 50 25
2000 1100 1100 2380 2500 1440 590 680 210 50 50 32
2500 1300 1300 2190 2310 1640 680 830 270 50 50 32
3000 1300 1300 2560 2680 1640 780 1020 320 50 50 32
4000 1300 1300 3320 3440 1640 1000 1350 420 65 65 32
5000 1500 1500 3160 3280 1840 1250 1650 530 65 65 32
6000 1600 1600 3330 3450 1940 1620 2180 630 80 80 50
7000 1600 1600 3820 3940 1940 1950 2460 740 100 100 50
8000 1800 1800 3510 3630 2140 2120 2680 840 100 100 50
9000 1800 1800 3910 4030 2140 2210 2950 940 100 100 50
10000 2000 2000 3580 3700 2340 2280 3230 1050 100 100 50
Specifications
  • Inspection manhole
  • Temperature sensor port
  • Drain port
  • Cold feed
  • Secondary return
  • Hot water outlet (hot draw)
  • Pressure gauge
  • Temperature gauge
  • Vent
  • Safety valve
  • Spare connection
  • Primary flow (steam inlet)
  • Primary return (condensate outlet)