Product Overview & Working Principle
The Delantherma Rooftop Direct Solar Water Heating System is a high-efficiency, pressurized solar thermal solution engineered for continuous, large-scale hot water supply in residential, commercial, and institutional applications.
1. The system operates on an advanced direct-flow heating principle: municipal cold water passes directly through high-performance solar collectors, achieving instantaneous heating via solar radiation without the thermal dampening of intermediate heat exchangers.
2. This simplified hydraulic structure significantly reduces thermal loss, maximizes energy conversion efficiency, and lowers system complexity and maintenance requirements.
3. It is ideal for hotels, apartment complexes, schools, hospitals, and medium-to-large commercial facilities with stable high-volume hot water demand.
4. The system is designed for rooftop deployment and is compatible with both flat and pitched roof structures. It can be customized according to project scale, local solar irradiance, and consumption profiles.
Technical Specifications & Engineered Parameters
|
Item |
Technical Specifications & Parameters |
|
System Type |
Direct pressurized solar water heating system |
|
Working Pressure |
0.6 – 1.0 MPa (High-pressure up to 1.2 MPa optional) |
|
Collector Compatibility |
High-borosilicate flat plate / evacuated tube options available |
|
Heat Absorber Coating |
Magnetron sputtering selective coating (α ≥ 0.92, ε ≤ 0.06) |
|
Peak Thermal Efficiency |
≥ 75% (under standard test conditions) |
|
Outlet Water Temperature |
45°C – 85°C (depending on solar irradiance) |
|
Storage Tank Material |
Food-grade SUS304 / Marine-grade SUS316 stainless steel |
|
Thermal Insulation |
50–60 mm polyurethane foam (λ ≤ 0.022 W/m·K) |
|
Service Life |
15–25 years (with regular maintenance) |
|
Mounting System |
10°–45° adjustable wind-resistant aluminum/galvanized steel bracket |
|
Pressure Integration |
Compatible with municipal pressurized water systems |
|
Auxiliary Options |
Electric backup heating / anti-freeze circulation system |
Commercial Applications & Key Benefits
Target Applications
- Residential & Hospitality: Apartments, hotels, eco-resorts
- Institutional & Healthcare: Schools, universities, hospitals, nursing facilities
- Industrial & Agricultural: Food processing, cleaning systems, agricultural hot water supply
Core Benefits
- Maximized thermal efficiency through direct-flow design
- Reduced operational energy costs (electricity/gas savings)
- Fast thermal response even in low irradiation conditions
- Modular and scalable system architecture
- Low maintenance with reduced mechanical failure risk
Industrial Manufacturing & Quality Control
Delantherma follows strict industrial manufacturing standards to ensure long-term reliability and global compliance.
Manufacturing Highlights
- Precision laser welding for stainless steel tanks to prevent leakage and corrosion
- Automated production lines for consistent solar collector quality
- 100% hydrostatic pressure testing at 1.2–1.5× rated working pressure
- Simulated solar thermal performance testing for quality validation
- Full traceability system for materials, production batches, and inspection records
Regulatory Compliance & Certifications
ISO 9001:2015 – Quality Management System
ISO 14001:2015 – Environmental Management System
CE Certification (Pressure Equipment Directive compliant)
Solar Keymark (available upon request)
Drinking water safety compliant materials
Third-party inspection reports available (SGS / TÜV)
Project Procurement FAQ
Q: Is this system suitable for freezing climates?
A: This direct-flow system is best suited for non-freezing or mild climate regions. For freezing environments, anti-freeze circulation systems or indirect glycol loop systems are recommended.
Q: Do you support OEM/ODM customization?
A: Yes. We provide full OEM/ODM services, including:
Tank capacity: 100L – 10,000L+
Collector area customization
Pressure rating adjustment
Logo branding
Custom mounting structures
Q: What is the maintenance requirement?
A: Minimal maintenance is required, including:
Periodic cleaning of collector glass
Annual inspection of pressure relief valves
Sacrificial anode replacement as needed
Q: What is the production lead time?
A: Standard orders: 15–20 days
Customized / bulk orders: 25–30 days
Q: What is the daily hot water output?
A: Under standard sunny conditions, output ranges from 100 to 500 liters per day per square meter of collector area (ΔT = 35°C).
Q: Do you provide engineering support for overseas projects?
A: Yes. We provide:
System capacity calculations
CAD & 3D layout drawings
Piping schematics
Remote installation guidance
Commissioning support
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