Heat Pump

Heat Pump About

A water heat pump system (which includes Water-to-Water geothermal/ground-source pumps, Water-to-Air heat pumps, and Air-to-Water sanitary hot water heat pumps) extracts thermal energy from a liquid source or transfers heat directly into a water loop for space heating, cooling, or domestic hot water (DHW).

Below is a detailed breakdown of the technical specifications, system configurations, and performance parameters for water heat pumps.

1. Classification & System Types

Heat Pump Type	Heat Source / Sink	Deliverable	Primary Applications
Water-to-Water (W2W)	Closed loop (ground loop, surface water) or Open loop (well water)	Chilled or Hot Water	Radiant floor heating, hydronic fan coils, process heating/cooling
Air-to-Water (A2W)	Ambient Outdoor Air	Chilled or Hot Water	Domestic Hot Water (DHW), central hydronic heating, radiator integration
Water-to-Air (W2A)	Water Loop (boiler/tower loop or geothermal loop)	Conditioned Ducted Air	Commercial multi-story buildings, residential ducted systems

2. Core Technical Specifications

Operating Temperatures & Limits

• Hot Water Output Temperature:

  • Standard Systems: $45circtext{C} text{ to } 55circtext{C}$ (ideal for low-temp radiators and radiant floor heating).

  • High-Temperature Systems: $65circtext{C} text{ to } 80circtext{C}$ (uses R134a, R290, or $text{CO}_2$ refrigerant for sanitization and boiler replacement).

• Source Water Inlet Temperature Range:

  • Ground/Closed Loop: $-5circtext{C} text{ to } 25circtext{C}$ (uses glycol anti-freeze mixture).

  • Open Well / Surface Water: $8circtext{C} text{ to } 20circtext{C}$.

  • Boiler/Tower Condenser Loop: $15circtext{C} text{ to } 35circtext{C}$.

Efficiency Metrics

• Coefficient of Performance (COP - Heating): 3.5 to 5.5 (varies by source/entering water temperature). A COP of 4.0 delivers 4 kW of heat output for every 1 kW of electrical input.

• Energy Efficiency Ratio (EER - Cooling): 15 to 22 (Btu/Wh).

• Seasonal Efficiency: SCOP $ge 4.2$ / SEER $ge 18$.

3. Key Components & Engineering Details

1. Compressor Technology:

   • Inverter-Driven Scroll or Rotary Compressors: Modulates capacity (20%100%) to match building thermal loads.

   • Refrigerants: R32, R410A, R134a, or natural refrigerants like R290 (Propane) and R744 ($text{CO}_2$).

2. Heat Exchangers:

   • Evaporator/Condenser: Double-wall or single-wall Brazed Plate Heat Exchangers (BPHE) made of AISI 316 stainless steel for high thermal efficiency.

   • Coaxial (Tube-in-Tube) Exchangers: Preferred for open-loop well water systems due to higher resistance to scaling and water impurities.

3. Hydronic Sub-Assembly:

   • Variable-speed EC circulation pumps (high efficiency).

   • Expansion vessel, safety relief valves (3 bar rating), and magnetic dirt separators/strainers on water inlets.

4. Controls & Safeguards:

   • PLC / Microprocessor controller supporting Modbus, BACnet, or LonWorks protocols.

   • Anti-legionella automatic heating cycles for DHW units.

   • Freeze protection controls, flow switch monitoring, and high/low refrigerant pressure switches.

4. Utilities & Installation Requirements

• Electrical Supply:

  • Residential: Single-Phase $220 - 240text{V} / 50text{Hz}$ or $60text{Hz}$.

  • Commercial: 3-Phase $380 - 415text{V} / 50text{Hz}$ or $460text{V} / 60text{Hz}$.

• Water Quality Limits (Source & Load Loops):

  • pH Level: $6.5 text{ to } 8.5$

  • Hardness: $< 10circtext{dH}$ (or $< 180 text{ ppm CaCO}_3$)

  • Chloride Content: $< 50 - 100 text{ mg/L}$ (higher levels require titanium heat exchangers).

  • Filtration requirement: $le 80 text{ mesh } (180 mutext{m})$ Y-strainer on loop inlets.

5. Applicable Standards & Certifications

• AHRI 1320 / ISO 13256-1 & 2: Water-Source Heat Pumps Rating Standards.

• EN 14511 / EN 14825: Testing and rating conditions for air-to-water and water-to-water units in Europe.

• PED 2014/68/EU / ASME Section VIII: Pressure Equipment Directives for internal heat exchangers and pressure vessels.

• CE / UL 1995: Electrical and safety compliance.

Versatile Chilling & HVAC Solution

Engineered for performance, this heat pump efficiently handles water chilling, HVAC, and various industrial processes. With customizable dimensions and an 8 Ton capacity, it addresses diverse commercial requirements while maintaining precise temperature control between 5C and 50C.


Intelligent and Safe Performance

Equipped with a digital control system, this heat pump offers user-friendly operation, real-time monitoring, and diagnostics. Safety is prioritized through built-in overload and short circuit protection, making it a secure choice for large-scale installations.


Eco-Friendly and Efficient Design

The use of an eco-friendly refrigerant and a hermetically sealed compressor minimizes environmental impact and ensures minimal energy wastage. Its low-noise operation and powder-coated metal body enhance longevity and reduce operational disruptions.