Product Overview
Solar air-to-water heat pumps extract thermal energy from ambient air to supply closed-loop hydronic systems for commercial greenhouse climate control.
This system integrates an air-source heat pump cycle with direct DC photovoltaic input and a standard AC grid connection. Thermal output is distributed via greenhouse heating pipes, under-bench loops, fan coil units, or central air handling equipment.
Commercial models deliver 75.5 to 172.5 kW of rated heating capacity and 53.3 to 115 kW of rated cooling capacity, operating with PV DC inputs from 200 to 560 V.
Technical Specifications & Commercial Range
|
Parameter |
Range / Specification |
|
Rated Heating Capacity |
75.5 – 172.5 kW |
|
Rated Cooling Capacity |
53.3 – 115.0 kW |
|
Recommended PV Power |
22 – 48 kW |
|
Solar DC Input Range |
200–560 V DC |
|
AC Power Supply |
380 V, 50/60 Hz |
|
Heating COP (Rated) |
3.51 – 3.65 W/W |
|
Cooling COP (Rated) |
2.82 – 2.86 W/W |
|
Water Flow Rate |
13.0 – 29.7 m³/h |
|
Water Connection Size |
DN50 – DN80 |
|
Water Pressure Drop |
≤35 – 50 kPa |
|
Outdoor Unit Dimensions |
1,990 × 900 × 1,780 to 2,250 × 1,180 × 2,300 mm |
|
Outdoor Unit Weight |
690 – 1,100 kg |
EVI Inverter Technology & Thermal Performance
Commercial greenhouse operations require dynamic thermal regulation to match changing weather and crop growth stages.
Enhanced Vapor Injection (EVI): Equipped with EVI DC inverter compressors, the units maintain reliable heating capacity and high COP levels even when ambient temperatures drop.
Variable-Speed Operation: The compressor adjusts output dynamically to match fluctuating greenhouse thermal loads, preventing the energy spikes common with fixed-speed systems.
Dual Energy Architecture: Photovoltaic arrays offset daytime compressor power consumption, while the 380 V AC grid connection serves as a dependable baseline and night-time backup power source.
Target Greenhouse Application Scenarios
Commercial Vegetable Greenhouses: Maintains steady night-time and winter temperatures required for optimal crop yields.
Flower & Nursery Facilities: Provides precise climate stability for temperature-sensitive propagation and flora growth.
Multi-Span Agricultural Complexes: Utilizes multi-unit parallel configurations to manage extensive heating/cooling demands across broad floor areas.
Retrofit Heating Projects: Integrates smoothly with existing hot-water distribution grids, buffer tanks, and alternative backup boilers.
Hydraulic Integration & System Architecture
The heat pump acts as the central thermal generator within a wider agricultural hydronic loop. Typical downstream configurations include:
Primary Circuit: Heat Pump to Buffer/Thermal Storage Tank to Hydraulic Header.
Distribution Network: Circulation pumps push heated or chilled water through multi-zone greenhouse piping.
Terminal Equipment: Connects directly to perimeter heating pipes, under-bench radiant networks, fan coil units, or agricultural air handling units.
For large-scale multi-span facilities, multiple units can be installed in parallel to share operational loads and provide staged capacity control.
Installation & Site Clearance Requirements
Airflow Clearance: Maintain minimum distance margins around the outdoor evaporator coil and top-discharge fan to prevent air recirculation and static pressure loss.
Foundation & Elevation: Install units on reinforced concrete pads or structural steel channels elevated above local snow lines and seasonal pooling levels.
Vibration Isolation: Use rubber vibration dampeners or spring isolators between the unit frame and foundation to minimize structural noise transmission.
Service Access: Keep control panels, water connections, and compressor access doors clear of permanent structural obstructions for routine maintenance.
FAQ
Q: Can this heat pump system operate entirely off-grid using only solar PV?
A: No. While the unit supports direct DC photovoltaic input (200–560 V) to reduce daytime energy consumption, it requires a stable 380 V AC grid connection (or local microgrid backup) to ensure continuous operation during cloudy periods, low solar generation, and night-time heating demands.
Q: How does the system handle automatic defrosting in freezing weather?
A: The integrated intelligent controller monitors ambient temperature and coil frosting conditions. When frost accumulation is detected, the unit initiates an automatic reverse-cycle or hot-gas defrost sequence. Proper site drainage must be arranged to handle meltwater and prevent ice buildup around the base of the outdoor unit.
Q: What is the maximum water supply temperature, and is it compatible with traditional heating pipes?
A: The maximum leaving-water temperature is engineered for hydronic greenhouse applications, making it fully compatible with standard agricultural heating loops, under-bench radiant pipes, and fan coil units. Specific water temperature requirements should be stated during project sizing.
Q: Can multiple heat pump units be combined for large multi-span greenhouses?
A: Yes. For extensive commercial greenhouse projects requiring higher total thermal outputs, multiple units can be piped in parallel to a common buffer tank and hydraulic header, enabling staged operation and balanced wear across compressors.
Hot Tags: solar air-to-water heat pump for greenhouses, China solar air-to-water heat pump for greenhouses manufacturers, suppliers, factory, heat pump and solar panels, heat pump for solar water heater, heat pump water heater with solar, solar dc heat pump, solar geyser pump, Solar heat pump system