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.

For further information please contact

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