Hot Water Management
How to Save Energi via Hot Water Management
Ir. Herry Widjanarko MBA MSIE
RHEMS, Bali 18-19 July 2013
Topics
• Hot Water Management;
– Loss of heat
• Water leakage
• Less Insulation
• Not optimal ...
RHEMS, Bali 18-19 July 2013
Loss of Heat
• Loss of heat, sometimes missed from the
calculation of energy saving, where the...
RHEMS, Bali 18-19 July 2013
Hot Water Leakage
• More water to be heat up
• Waste of water and energy
• Reduce cleanness
• ...
RHEMS, Bali 18-19 July 2013
Insulation
• High investment cost vs. loss of heat
• Significant in certain area of piping
• O...
RHEMS, Bali 18-19 July 2013
System Design 1
• Point to consider:
– No perfect insulation exist
– High investment, low oper...
RHEMS, Bali 18-19 July 2013
System Design 2
• Point to achieve:
– Reduce open surface area
– Reasonable investment, lowest...
RHEMS, Bali 18-19 July 2013
Source of hot water
• Chiller
• Boiler
• Water Heater;
– Electric
– Solar
– Gas
– Heat Pumps
RHEMS, Bali 18-19 July 2013
Types of Water Heater
RHEMS, Bali 18-19 July 2013
Cost to heat up water up to 55 C̊
* Tarif non subsidi hanya berlaku di luar listrik, tarif lis...
RHEMS, Bali 18-19 July 2013
Heat Pump Principles
• The most energy saving after solar power
• No dependent with weather
• ...
RHEMS, Bali 18-19 July 2013
How Heat Pump Work
• Use heat (entropy) in air as main energy
to heat the water
• Electricity ...
RHEMS, Bali 18-19 July 2013
How Heat Pump Work 1
E
v
a
p
o
r
a
t
o
r
Expansion
Valve
Compressor
Heat Pump
Water Heater
Wor...
RHEMS, Bali 18-19 July 2013
How Heat Pump Work 2
E
v
a
p
o
r
a
t
o
r
Expansion
Valve
Compressor
Heat Pump
Water Heater
Wor...
RHEMS, Bali 18-19 July 2013
Types Heat Exchanger
☺ Double wall pipes
☺ Tanks with pipes
☺ Titanium tubes
RHEMS, Bali 18-19 July 2013
Heat Exchanger
Exchange heat from refrigerant to water
- Water force flow or natural flow (tan...
RHEMS, Bali 18-19 July 2013
COP
• The heat pump efficiency is called COP
• The higher value the better
• It depends on:
– ...
RHEMS, Bali 18-19 July 2013
Example Heat Pump COP
RHEMS, Bali 18-19 July 2013
Heat Pump Design
• Individual
• Individual combined with solar water
heater
• Central system
•...
RHEMS, Bali 18-19 July 2013
Central vs. Individual
Consideration factor:
• Location and distance
• Frequency of usage
• Te...
RHEMS, Bali 18-19 July 2013
Individual
• Location among point of hot water outlets
far each other, like cottages types
• C...
RHEMS, Bali 18-19 July 2013
Sample Individual
Pipa 1"
Pipa 1/2"
Pipa 3/4"
Sistem Air
Dingin Rumah
Use of natural
conventio...
RHEMS, Bali 18-19 July 2013
Sample Individual with
Solar Water heater
Sistem Air
Dingin Rumah
RHEMS, Bali 18-19 July 2013
Combined System Work
Solar
Panel
Evaporator Solar
Panel
Evaporator Solar
Panel
Evaporator
Sola...
RHEMS, Bali 18-19 July 2013
Central Heat Pump Design
System
• Total water per day
• Peak hours (50% needs in 2 hours)
• Ta...
RHEMS, Bali 18-19 July 2013
Point to consider
• PLN cost based on usage and no more
capacity cost
• Source of cold water
•...
RHEMS, Bali 18-19 July 2013
Tank Consideration
• Low volume capacity to avoid heat loss
• Have cold water back-up tanks
• ...
RHEMS, Bali 18-19 July 2013
Heat Pump Capacity
• Possible to supply during peak hours to
avoid big tanks (able to fulfill ...
RHEMS, Bali 18-19 July 2013
Choosing Heat Pump
• Well made from real factory
• Capable run 50% per day without damaged
• S...
RHEMS, Bali 18-19 July 2013
Circulating Water
• The circulating hot water in piping system
can use separate heat pump inst...
RHEMS, Bali 18-19 July 2013
Example of System
Hot Water Tank Hot Water Tank
Heat
Pump
53ºC
Heat
Pump
53ºC
Heat
Pump
53ºC
P...
RHEMS, Bali 18-19 July 2013
Example of System
Hot Water Tank
Heat
Pump
55ºC
Heat
Pump
55ºC
PompaPompaPompa
Cold Water Tank
RHEMS, Bali 18-19 July 2013
Example of System
Pompa
Hot Water TankHot Water Tank Hot Water TankHot Water Tank
Heat
Pump
50...
RHEMS, Bali 18-19 July 2013
Example of System
Hot Water Tank
Heat
Pump
55ºC
Heat
Pump
55ºC
PompaPompaPompa
Cold Water Tank...
RHEMS, Bali 18-19 July 2013
Pay Back Period
• Compare with others methods the
operation cost of heat pumps is about
30%-50...
RHEMS, Bali 18-19 July 2013
Investment Cost
• Compare with heating element, the
investment cost is about 1.5 - 2 times
hig...
RHEMS, Bali 18-19 July 2013
Price Tanks vs. Heat Pump
• The price of heat pump is about 2 times of
the tank capacities.
• ...
RHEMS, Bali 18-19 July 2013
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Heat Pump, TUV Techindo, Bali 18-19 juli 2013

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TUV Techindo seminar of Eco Hotel, Hot Water Management, Bali 18-19 Juli 2013

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Transcript of "Heat Pump, TUV Techindo, Bali 18-19 juli 2013"

  1. 1. Hot Water Management How to Save Energi via Hot Water Management Ir. Herry Widjanarko MBA MSIE
  2. 2. RHEMS, Bali 18-19 July 2013 Topics • Hot Water Management; – Loss of heat • Water leakage • Less Insulation • Not optimal design system – Source of hot water • Comparison of types and energy usage • Heat pumps principles
  3. 3. RHEMS, Bali 18-19 July 2013 Loss of Heat • Loss of heat, sometimes missed from the calculation of energy saving, where the loss means more energy to be wasted. • The cost to stop or prevent the heat some times expensive and not possible • Possible loss of heat is due to; hot water leakage, less insulation and most important the design of the system
  4. 4. RHEMS, Bali 18-19 July 2013 Hot Water Leakage • More water to be heat up • Waste of water and energy • Reduce cleanness • Could be solved if detected; – Run pressure test – Check the whole piping and valve
  5. 5. RHEMS, Bali 18-19 July 2013 Insulation • High investment cost vs. loss of heat • Significant in certain area of piping • Old system; – Not all have possible to be insulated – High cost to replace • New system; – Possible to implemented in all areas – Relative lower cost than at old system
  6. 6. RHEMS, Bali 18-19 July 2013 System Design 1 • Point to consider: – No perfect insulation exist – High investment, low operating cost vs. low investment, high operating cost – Space limitation – Technology or industrial availability limitation
  7. 7. RHEMS, Bali 18-19 July 2013 System Design 2 • Point to achieve: – Reduce open surface area – Reasonable investment, lowest operating cost. – Optimum space – Use all physics principles and not against – Push hot water in design of tanks, heat-up from lowest temperature possible
  8. 8. RHEMS, Bali 18-19 July 2013 Source of hot water • Chiller • Boiler • Water Heater; – Electric – Solar – Gas – Heat Pumps
  9. 9. RHEMS, Bali 18-19 July 2013 Types of Water Heater
  10. 10. RHEMS, Bali 18-19 July 2013 Cost to heat up water up to 55 C̊ * Tarif non subsidi hanya berlaku di luar listrik, tarif listrik industri diatas 200KVA kwh m3 kwh kg kwh 10.00 2.08 48.90 5.60 17.50 kwh kg kwh liter kwh 10.00 1.87 48.90 4.54 17.50 864.00 5,850.00 864.00 4,500.00 864.00 864.00 9,000.00 864.00 10,000.00 864.00 8,640.00 16,848.00 42,249.60 45,360.00 15,120.00 Tarif Indonesia * Tarif yang berlaku buat Industri Biaya Energi Pemanas (Rupiah) Satuan Satuan di Indonesia
  11. 11. RHEMS, Bali 18-19 July 2013 Heat Pump Principles • The most energy saving after solar power • No dependent with weather • Heat when needed, no need big tanks • Flexible design • No danger of burning and electric shock
  12. 12. RHEMS, Bali 18-19 July 2013 How Heat Pump Work • Use heat (entropy) in air as main energy to heat the water • Electricity is only use to transfer the heat from air (water) to water, this make the system very low usage of electricity • Lower the temperature of air
  13. 13. RHEMS, Bali 18-19 July 2013 How Heat Pump Work 1 E v a p o r a t o r Expansion Valve Compressor Heat Pump Water Heater Work Cycle Water Heat Exchanger
  14. 14. RHEMS, Bali 18-19 July 2013 How Heat Pump Work 2 E v a p o r a t o r Expansion Valve Compressor Heat Pump Water Heater Work Cycle Water Heat Exchanger Pumps Hot Water 55 C
  15. 15. RHEMS, Bali 18-19 July 2013 Types Heat Exchanger ☺ Double wall pipes ☺ Tanks with pipes ☺ Titanium tubes
  16. 16. RHEMS, Bali 18-19 July 2013 Heat Exchanger Exchange heat from refrigerant to water - Water force flow or natural flow (tanks with pipe of refrigerant) - The flow of water must be correct to absorb heat optimum - COP in natural flow is smaller than force flow
  17. 17. RHEMS, Bali 18-19 July 2013 COP • The heat pump efficiency is called COP • The higher value the better • It depends on: – Water inlet temperature – Ambient air temperature – Target of heating temperature
  18. 18. RHEMS, Bali 18-19 July 2013 Example Heat Pump COP
  19. 19. RHEMS, Bali 18-19 July 2013 Heat Pump Design • Individual • Individual combined with solar water heater • Central system • Central system combined with solar water heater
  20. 20. RHEMS, Bali 18-19 July 2013 Central vs. Individual Consideration factor: • Location and distance • Frequency of usage • Technical space possibilities • Cost of investment • Cost of operations
  21. 21. RHEMS, Bali 18-19 July 2013 Individual • Location among point of hot water outlets far each other, like cottages types • Cost to keep hot water in pipe is high due to insulation or high loss of heat • Low frequency of usage
  22. 22. RHEMS, Bali 18-19 July 2013 Sample Individual Pipa 1" Pipa 1/2" Pipa 3/4" Sistem Air Dingin Rumah Use of natural convention to circulate hot water
  23. 23. RHEMS, Bali 18-19 July 2013 Sample Individual with Solar Water heater Sistem Air Dingin Rumah
  24. 24. RHEMS, Bali 18-19 July 2013 Combined System Work Solar Panel Evaporator Solar Panel Evaporator Solar Panel Evaporator Solar Panel Evaporator Solar Panel Evaporator Solar Panel Evaporator Start Night Night Morning Afternoon Dawn Night
  25. 25. RHEMS, Bali 18-19 July 2013 Central Heat Pump Design System • Total water per day • Peak hours (50% needs in 2 hours) • Tank and Heater composition (heat pump is less electricity, so turn on when needed) • Losses, circulating distribution, insulation • Heat Transfer efficiency, high degree, high energy, low degree, low energy, no double job or heating-cooling, steady/stable temperature
  26. 26. RHEMS, Bali 18-19 July 2013 Point to consider • PLN cost based on usage and no more capacity cost • Source of cold water • Open tanks or pressure tanks (close) • Single system or multiple (based on section)
  27. 27. RHEMS, Bali 18-19 July 2013 Tank Consideration • Low volume capacity to avoid heat loss • Have cold water back-up tanks • Design to make hot water flow first • Price of tank is comparable with the heat pump, better use more heat pump than big tanks • Close tank (pressure tank) rather than open tank (high heat losses)
  28. 28. RHEMS, Bali 18-19 July 2013 Heat Pump Capacity • Possible to supply during peak hours to avoid big tanks (able to fulfill the requirement within 1 hours of designed capacity of needed water, comparable with max flow capacity) • Low electricity power input makes possible to have just in time principle (no more PLN hidden fee)
  29. 29. RHEMS, Bali 18-19 July 2013 Choosing Heat Pump • Well made from real factory • Capable run 50% per day without damaged • Sensitivity of temperature sensor about 2 ̊ C, the arrangement of the sensor is critical issue • Design by people who understand heat pump, eco-industry, energy saving • Consider investment vs. operational cost and electricity capacity
  30. 30. RHEMS, Bali 18-19 July 2013 Circulating Water • The circulating hot water in piping system can use separate heat pump instead of main heat pump, can be lower than the main system to reduce energy • Reduce the use of water, people intend to flow the water until feel hot/warm
  31. 31. RHEMS, Bali 18-19 July 2013 Example of System Hot Water Tank Hot Water Tank Heat Pump 53ºC Heat Pump 53ºC Heat Pump 53ºC Pump Pump User Heat Pump 51ºC Circulation with separate system Pump
  32. 32. RHEMS, Bali 18-19 July 2013 Example of System Hot Water Tank Heat Pump 55ºC Heat Pump 55ºC PompaPompaPompa Cold Water Tank
  33. 33. RHEMS, Bali 18-19 July 2013 Example of System Pompa Hot Water TankHot Water Tank Hot Water TankHot Water Tank Heat Pump 50ºC Pompa Heat Pump 50ºC Pompa Heat Pump 50ºC Pompa
  34. 34. RHEMS, Bali 18-19 July 2013 Example of System Hot Water Tank Heat Pump 55ºC Heat Pump 55ºC PompaPompaPompa Cold Water Tank Hot Water Tank Solar Panel Pompa
  35. 35. RHEMS, Bali 18-19 July 2013 Pay Back Period • Compare with others methods the operation cost of heat pumps is about 30%-50% less than other methods. • Pay back period period compare with heating element water heater in every room is less than 1 year.
  36. 36. RHEMS, Bali 18-19 July 2013 Investment Cost • Compare with heating element, the investment cost is about 1.5 - 2 times higher but the operational cost is about 1/3 or 1/4 of the cost.
  37. 37. RHEMS, Bali 18-19 July 2013 Price Tanks vs. Heat Pump • The price of heat pump is about 2 times of the tank capacities. • Heat pump with capacities 40 kw or about 1250 liter per hour (Jakarta condition) is about equal with price of tank with 2500 liter capacities.
  38. 38. RHEMS, Bali 18-19 July 2013
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