Solar Heat Water System

Product Definition

A Solar Heat Water System is a renewable thermal solution that converts solar radiation into usable hot water through collectors, storage tanks, and circulation control. It reduces electricity or gas consumption and ensures stable hot water supply for both commercial and residential infrastructure projects.

Technical Parameters & Core Specifications

• Solar Collector Efficiency: 70%–80% under EN12975 testing

• Heat Output: 600–900 W/m² depending on irradiance

• Working Temperature Range: 45°C–95°C

• Tank Capacity Options: 150L–10,000L+ modular

• Circulation Mode: Active (pump) / Passive (thermosyphon)

• Heat Transfer Fluid: Water/Glycol mix with anti-freezing

• Water Pressure Endurance: ≥ 0.6–1.2 MPa

• Control System: Digital differential thermostat with sensors

• Solar Fraction Contribution: 60%–85% of annual hot water demand

• Standards Compliance: ISO 9806 / SRCC / CE / IEC

System Structure & Material Composition

Solar Heat Water System consists of engineered components designed for long-term reliability:

• Solar Collectors: Flat-plate or evacuated tube; copper absorber with selective coating (≥ 95% absorption)

• Storage Tank: Steel inner tank with enamel/316L stainless steel anti-corrosion lining, PU foam insulation

• Circulation Pump & Pipeline: High-temperature resistant PPR/Copper pipes

• Heat Exchanger: Coil-type for indirect closed-loop systems

• Controller & Monitoring Unit: Temperature sensors, circulation management, anti-overheat control

Manufacturing & Engineering Workflow

1. Collector Absorber Production → Laser welding of copper tubes

2. Selective Coating Processing → PVD/Black chrome surface treatment

3. Tank Fabrication → Welding, pressure testing, internal enamel coating

4. Insulation Integration → PU foam injection (35–50 kg/m³ density)

5. System Assembly → Pump stations, valves, sensors, structural brackets

6. Reliability Testing → Thermal efficiency, stagnation, impact, corrosion

7. Pallet Protection → Export-grade packaging for global transport

Industry Comparison

Application Fields

Solar Heat Water Systems are widely deployed by project purchasers for:

• Hotels, hostels, resorts

• Hospitals and medical institutions

• Schools, dormitories, and public facilities

• Swimming pools and gyms

• Large residential buildings and estates

• Industrial process pre-heating

Customer Pain Points & Technical Solutions

• High hot-water operating cost → Solar fraction reduces 60–85% fossil fuel dependency

• Peak demand fluctuations → Modular tank design ensures stable storage capacity

• Maintenance difficulty → Anti-corrosion tanks + long-lifecycle collectors (15–25 years)

• Cold climate inefficiency → Glycol closed-loop + evacuated-tube collectors for winter performance

Engineering Risks & Prevention

• Ensure structural certification for rooftop collector load-bearing

• Install anti-scald mixing valves for > 60°C water

• Backup heating required for low-sunlight days

• Pipeline insulation must resist UV and moisture

• Regular glycol replacement every 3–5 years in closed-loop systems

Procurement & Selection Guide

1. Determine daily hot water demand (L/day per user or equipment)

2. Choose collector type: Flat plate → commercial rooftops Evacuated tube → cold climate zones

3. Verify tank insulation thickness ≥ 50mm PU

4. Check controller safety protections: anti-freeze, stagnation, alarm

5. Request hydraulic simulation for EPC feasibility

6. Ensure certificates: ISO 9806 / CE / SRCC for compliance

7. Evaluate service network and spare parts guarantee ≥ 10 years

Engineering Case Study

Hotel Hot Water Retrofit – 80-room coastal resort

• Collector area: 120 m² rooftop evacuated tube system

• Tank volume: 5,000 L modular stainless steel thermal storage

• System integration: Auxiliary heat pump for rainy season

• Fuel savings: 72% reduction in annual gas consumption

• Investment payback: 3.8 years

• CO₂ emissions reduction: ≈ 35 tons/year

FAQ – Professional Buyer Questions

1. Can it operate at night? Hot water stored in insulated tanks covers nighttime usage.

2. Do I need backup heating? Yes, especially in winter or low-irradiance conditions.

3. What is the service life? Collectors up to 20–25 years; tanks 10–15 years.

4. How does it perform in winter? Evacuated tube systems maintain high thermal performance.

5. Water stagnation risk? Controller releases heat buildup automatically.

6. Does it require water treatment? Softening recommended in high-scale regions.

7. Can it be integrated with heat pumps? Yes—hybrid systems maximize efficiency.

8. Installation time? Medium-sized hotel retrofits: 7–20 days depending on structure.

9. How to size the system? Based on occupancy or industrial load calculations.

10. What about cloudy regions? Increased collector area or hybrid backup recommended.

11. Warranty terms? 5 years for collectors minimum; tank up to 10 years.

Request for Quotation / Engineering Documentation

Contact our technical team for:

• Project feasibility assessment

• CAD layout drawings & hydraulic scheme

• Specification sheet with ROI analysis

• Engineering samples & commercial pricing

E-E-A-T Engineering Authority

Content developed using global solar water heating standards (ISO 9806, EN12976), applied in real EPC projects across hotels, hospitals, and residential infrastructure. Technical validation supported by certified solar thermal engineers experienced in system design, commissioning, and performance monitoring.

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