Product Overview
A commercial greenhouse heat pump transfers heat from the outdoor environment into a hydronic heating system rather than generating heat directly through electric resistance.
When solar PV power is available, the heat pump can use DC solar input to reduce dependence on conventional grid electricity. When solar production is insufficient, the system can use AC grid power as backup.
This operating concept is particularly relevant to greenhouses because heating demand is highest during periods of low outdoor temperature, while solar availability changes throughout the day.
For projects requiring continuous operation, the solar heat pump should therefore be evaluated as part of the complete energy system rather than as a standalone solar appliance.
Key Technical Specifications
|
Parameter |
LSQS66R2/BP-CP |
LSQS75R2/BP-CP |
LSQS150R2/BP-CP |
LSQS190R2/BP-CP |
|
AC Input |
380V, 50/60Hz |
380V, 50/60Hz |
380V, 50/60Hz |
380V, 50/60Hz |
|
Maximum AC Input Power |
23 kW |
26 kW |
48 kW |
52 kW |
|
Maximum AC Current |
35 A |
40 A |
73 A |
79 A |
|
Solar DC Input |
200–560 V |
200–560 V |
200–560 V |
200–560 V |
|
Recommended PV Power |
22 kW |
24 kW |
40 kW |
48 kW |
|
PV Maximum Input Current |
15 A × 2 |
15 A × 2 |
15 A × 2 |
15 A × 2 |
|
Compressor |
EVI DC Inverter |
EVI DC Inverter |
EVI DC Inverter |
EVI DC Inverter |
|
Compressor Quantity |
2 |
2 |
4 |
4 |
|
Refrigerant |
R410 / R32 |
R410 / R32 |
R410 / R32 |
R410 / R32 |
|
Water Flow |
13 m³/h |
14.8 m³/h |
24.6 m³/h |
29.7 m³/h |
|
Water Pressure Drop |
≤35 kPa |
≤35 kPa |
≤38 kPa |
≤50 kPa |
|
Water Connection |
DN50 |
DN50 |
DN65 |
DN80 |
|
Outdoor Unit Size |
1990 × 900 × 1780 mm |
1990 × 900 × 1780 mm |
2250 × 1180 × 2300 mm |
2250 × 1180 × 2300 mm |
|
Noise Level |
≤71 dB |
≤71 dB |
≤73 dB |
≤73 dB |
|
Outdoor Unit Weight |
690 kg |
720 kg |
1050 kg |
1100 kg |
Typical Commercial Greenhouse Applications
The system can be considered for:
- Vegetable production greenhouses
- Flower and ornamental plant greenhouses
- Commercial nurseries
- Multi-span greenhouse complexes
- Controlled-environment agriculture facilities
- Horticultural production buildings
- Seedling and propagation houses
- Greenhouse retrofit projects replacing fossil-fuel heating
- Projects combining PV generation with hydronic HVAC
For large installations, multiple heat pump units can be combined with water pumps, buffer tanks, distribution piping and greenhouse heat emitters according to the required heating load.
How to Select the Right Model for a Greenhouse
Model selection should start with the greenhouse's thermal load, not the available PV capacity.
Calculate the Heating Load
The required heating capacity depends on:
- Greenhouse floor area and volume
- Location and winter design temperature
- Greenhouse covering material and insulation level
- Air leakage and ventilation rates
- Required indoor target temperature
- Crop type and growth stages
- Operating schedule and internal gains
Define the Hydronic System
Confirm:
- Required supply and return water temperatures
- Required water flow and pressure drop limitations
- Existing or planned pipe diameter (DN50 to DN80 options)
- Heat distribution method (fan coils, finned tubes, or air handlers)
- Buffer tank and hydraulic separator integration
Evaluate Solar and Grid Parameters
Determine local solar irradiation patterns, available roof/ground space for PV arrays, grid voltage compliance, and emergency backup specifications.
Site Installation, Commissioning & Engineering Requirements
Structural Footprint & Clearance: Large units (up to 2250 × 1180 × 2300 mm and 1100 kg) require engineered concrete pads and adequate maintenance clearance.
Acoustic Planning: With noise levels up to 71–73 dB, unit positioning should respect local environmental guidelines and sensitive greenhouse growing zones.
Electrical & Hydraulic Coordination: Verify three-phase 380V stability, maximum current ratings, and correct fluid flow rates to prevent pressure drop anomalies.
Commissioning Support: Professional startup checks involve refrigerant pressure verification, sensor calibration, controller testing, and hydronic balancing.
FAQ
Q: Can solar PV fully power a greenhouse heat pump?
A: It is designed to offset a major share of annual electricity consumption. However, due to solar intermittency and nighttime heating demands, grid backup or secondary energy storage is required for 24-hour continuous operation.
Q: Can the heat pump operate during overcast days or at night?
A: Yes. The hybrid system automatically switches to or supplements with AC grid power when solar generation drops, ensuring uninterrupted temperature control for the crops.
Q: How is equipment sizing determined for irregular greenhouse shapes?
A: Sizing is strictly based on calculated heat loss metrics (U-values, infiltration, delta-T) rather than raw floor area alone, ensuring accurate capacity matching.
Q: Can this system replace an existing industrial gas boiler?
A: It can serve as a primary heat source or operate alongside existing boilers in a bivalent system, provided the hydraulic loop temperatures match the heat pump output parameters.
Q: What maintenance is required for commercial units?
A: Routine checks include coil cleaning, refrigerant pressure monitoring, water filter flushing, electrical terminal inspection, and control logic verification.
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