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Heat Pump

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Published in: Mechanical
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Heating is the major type of energy consumption in colder countries. Because of shortage of fossil fuels, efforts are made to find alternative energy sources. Therefore heat pump is an answer to the above problems.

Harish C / Pune

5 years of teaching experience

Qualification: M.Tech (MIT - 2016)

Teaches: Algebra, Mathematics, Physics, All Subjects, Chemistry, Science, GATE Exam, Engineering Graphics, Mechanical, Mechanics

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  1. Heat Pump And Their Types By Harish Choudhary B.E,M.E
  2. Heat Pump Heat pumps are designed to move thermal energy opposite to the direction of heat flow by absorbing heat from a cold space and release it to a warmer one. High-Temperature Body Heat Work w Heat Low-Temperature Body
  3. Need of Heat Pump Heating is the major type of energy consumption in colder countries. Because of shortage of fossil fuels, efforts are made to find alternative energy sources. Therefore heat pump is an answer to the above problems.
  4. Coefficient of Performance (COP) COP = High-Temperature Body Heat w Heat Work Low-Temperature Body Desired Output Required Input High-Temperature Body Heat Work w Heat Low-Temperature Body
  5. COPR = ??? OF ???? PUMP AND REFRIGERATOR ???? = 1+ ??? (21 ???? (22 w ???? - ??? = 1 (21 (22
  6. Types of Heat Pump 1. 2. 3. 4. 5. (ASHP) Air Source Heat Pump Ground Source Heat Pump (GSHP) Exhaust air Heat Pump (EAHP) Water Source Heat Pump (WSHP) Other type of Heat Pumps
  7. 1. Air source Heat Pump (ASHP) REFRIGERANT 1 AIR HEAT EXCHANGER (EVAPORATOR) OUTDOOR REVERSING VALVE coli EXPANSION VALVE COMPRESSOR BYPASS VALVE REFRIGERANT 1 AIR HEAT EXCHANGER (CONDENSER) REFRIGERANT HOT VAPOR HOT LIQUID COLD VAPOR COLD LIQUID AIR INSIDE OUTSIDE
  8. Atmospheric air is used as the source of heat. ASHP are relatively simple and easy to install. They are inexpensive. Hence they are widely used. The higher temperature differential during periods of extreme cold or heat leads to declining COP. The average COP over seasonal variation is typically 2.5-2.8.
  9. 2. Ground Source Heat pump (GSHP) WATER 1 REFRIGERANT HEAT EXCHANGER (EVAPORATOR) MAIN "STEU PUMP DHW 1 REFRIGERANT HEAT EXCHANGER DHW TANK EXPANSION VALVE CROUND Los's LATENT HEAT REVERSIN VALVE COMPRESSOR BYPASS VALVE REFRIGERANT 1 AIR HEAT EXCHANGER (CONDENSER) REFRIGERANT LOOP HOT VAPOR HOT LIQUID COLD VAPOR COLD LIQUID DOMESTIC HOT WATER (DHW) GROUND LOOP ANTIFREEZE WATER 50LN
  10. Extracts heat from the ground or similar sources. Ground-source heat pumps, also called geothermal heat pumps. The temperature differential is lower therefore they have higher COP compared to ASHP. They are expensive compared to ASHP.
  11. 3. Exhaust air heat pump RECOVERY (EAHP) BEDROOM LIVING ROOM BATHROOM KITCHEN Warm Stale Air From Inside Fresh Air From Outside Stale Air To Outside EXHAUST AIR HEAT RECOVERY Pre-heated Fresh Air to Inside
  12. An exhaust air heat pump extracts heat from the exhaust air of a building and transfers the heat to the supply air. This type of heat pump requires a certain air exchange rate to maintain its output power.
  13. 4 Water Source Heat Pump (WSHP) SENSOR COLD AIR HOT WATER OUTLET COLD WATER INLET COMPRESSOR EXPANSION OUTLET FAN J tit HOT AIR INLET EVAPORATOR WATER H EAT EXCHANGER
  14. Uses flowing water as source. This Heat pump has water heat exchanger which increases the overall size. Therefore this heat pump is expensive compared to ASHP and GSHP. The overall design is complex.
  15. 5. Other type of heat pumps Hybrid (HHP) Hybrid (or twin source) heat pumps: when outdoor air is above 4 to 8 Celsius they use air. When air is colder, they use the ground source(depending on the ground temperature). Solar assisted heat pump This system uses solar collectors which utilize the sun's energy to heat water which is used as source of heat.
  16. Representation of Heat pump cycle on P-H chart
  17. Applications of Heat Pump 1. 2. 3. 4. Purification of water. Concentration of dyes and chemicals. Heat pump process for Drying. For year round Air conditioning.
  18. ??-???? YOU

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