3in 1 Heat Pump Technology

Introduction

This is a novel design with an air conditioning, water heating and water chilling in a single unit.

Features

• Integrated System: Includes tap water heater and potable water cooler
  
• High Heat Transfer Coefficients: Novel tubular exchangers
  
• Instant-on-Demand Supply of Hot and Cold Water: No storage required
  
• Simple to Operate: Simply turn on the hot or chilled water tap to draw water
  
• Chills Potable Water to 18oC: 0.5 litre/min or 30 litre/h
  
• Heats Tap Water to 45oC: 3 to 4.5 litre/min or 180 to 270 litre/h in a 1.5 TR AC
  
• Low Operating Costs: 60 to 70% reduction in operating costs
  
• Lower Initial Cost: Compared to the conventional air conditioner + electric water heater + water cooler
  
• Compact Design: same footprint as that of Window or Split Air Conditioner

Applications

• Residential
  • Simultaneous space cooling, water heating and cold water for drinking
• Commercial --- Hotels, Restaurants, Hospitals, etc.
  • Space cooling, water heating/preheating and simultaneous production of cold and hot water streams
• Industrial --- Dairy, Pharmaceutical, Textile, Chemical Process, etc.
  • Water heating/preheating, air conditioning and simultaneous generation of cold and hot water stream, condenser to re-boiler heat Pumping
  • Cogeneration of hot water and potable cold water along with air conditioning

Need and Scope of Heat Pump for Energy Conservation

• Reduce Energy Cost
  • " Improve the economics of system
• Reduce Environmental Impact
  • " Reduced thermal pollution caused by heat rejection from the condenser in air cooled mode
  • " Producing multi-utilities from a single system instead of having individual system for each utility
• Energy Conservation "
  • Simultaneous generation of hot and cold utilities
    
  • " Condenser and desuperheater heat recovery
  • " Preheating of boiler feed water, which is free if primary useful effect is cooling and vice versa
• Novel Heat Exchangers are Designed and Integrated
  • " Low cost tubular heat exchanger # additional height of 76 mm "
  • Inventory in refrigerant side is compare to plate heat exchanger (PHE)
  • "Clean-in-place heat exchanger

Benefits of HPs for Residential and Commercial Use

Payback Investigated and Reported in AC&R Journal, March 2001, Vol 4, No 1

• Commercial application: 4.2/4.4 months for SHP/WHP respectively
  
• Residential application: 8.4/8.8 months for SHP/WHP respectively
  
• Novel HP can replace conventional AC, electric water heater (EWH) and water cooler

New Version of SHP

• Improvement in heating capacity from 3.11 to 4.9 kW: 57.5% more
  
• Cooling capacity reduced from 5.67 to 5.28 kW: 6.8% less
  
• Overall COP increases from 5.49 to 6.52: 18.8% more
  
• Expected payback period reduced from 4.2 to 3.3 months for commercial market
  
• Expected payback period reduced from 8.4 to 6.6 months for residential application.

Source: Department of Mechanical Engineering
Indian Institute of Technology Bombay
Powai Mumbai 400 076

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