Solar Energy Technology - PowerPoint PPT Presentation

1 / 10
About This Presentation
Title:

Solar Energy Technology

Description:

... (Electricity from solar cells) Solar thermal electric (Focussed ... 10 to 30 units of solar energy gathered for every unit of energy used to run fans or pumps ... – PowerPoint PPT presentation

Number of Views:466
Avg rating:3.0/5.0
Slides: 11
Provided by: toshi223
Category:

less

Transcript and Presenter's Notes

Title: Solar Energy Technology


1
Solar Energy Technology for Commercial Facilities
John Archibald American Solar, Inc.
Association of Energy Engineers Baltimore
Chapter March 2002
2
What do solar energy systems offer?
  • Energy savings
  • Cost savings
  • Reduced maintenance
  • Improved reliability
  • Improved operability
  • Improved environment for workforce

3
What types of solar energy systems are available?
  • Solar Electric
  • Photovoltaics (Electricity from solar cells)
  • Solar thermal electric (Focussed heat for steam
    turbine electricity)
  • Active Thermal Systems pump air or water
  • Air heating up to 190 deg.F
  • Mid temperature water heating 110-180deg.F
  • Low temperature pool heating lt 110 deg. F
  • Passive Thermal Systems heat without fans or pumps

4
Where should solar electricsystems be deployed?
  • Photovoltaics
  • Remote applications with complex fuel/electricity
    delivery
  • Small local applications with high cost power
    line installation
  • Security lighting, sensors, and radio/call boxes
  • Lighting for critical operations
  • Solar Thermal Electric
  • High cost electricity with concurrent heating
    needs
  • Combined heating, absorption cooling, and power
    applications
  • Energy Savings Performance Contracts for solar
    heat

5
Where should water heating systems be deployed?
  • Mid temperature water heating
  • Displace high cost electric resistance domestic
    water heating
  • Large volume water preheating for labs, medical,
    or equipment washdown
  • Water tube radiant floor space heating
  • Swimming pool heating
  • Almost all heated outdoor pools
  • Heated indoor pools without heat recovery from
    dehumidification
  • Heated indoor pools with high cost electric
    dehumidification

6
Where should solar air heating systems be
deployed?
  • Low temperature air - less than 110 deg.F
  • Ventilation preheating in cold climates
  • High volume low temperature drying applications
  • Mid temperature air 110 - 190 deg.F
  • Emergency generator standby heating all climates
  • Boiler air pre-heating all climates
  • Ventilation air heating and preheating
  • Heat pump pre-heating
  • Hot water heating with air to water heat
    exchanger
  • Air radiant floor and under floor ventilation

7
What makes a good solar application?
  • Year round load, year round load, year round load
  • Make the system repay investment every day the
    sun shines
  • Dont try to make solar meet 100 of the peak
    energy needs for large systems
  • Use solar to cut annual costs of large energy
    systems
  • Displace electric, propane, oil heat with solar
    heat
  • Avoid conversion from the original solar energy
    for use or storage
  • no AC inverter, no batteries, no thermal storage
    tank, no grid connection

8
What makes a good solar application?
  • Low installed cost
  • under 25/sq ft
  • High solar efficiency
  • 10 to 30 units of solar energy gathered for every
    unit of energy used to run fans or pumps
  • greater than 20 of available solar energy
    converted to heat or electricity
  • Building integrated
  • makes building walls or roof do double duty
    (weather envelope and energy production) for no
    extra cost
  • Buy the energy not the system, if capital funds
    are not available but operating funds for energy
    bills are

9
Standby heating of emergency generators
  • Electric heaters keep engine jacket water at 130
    deg F all year
  • 2-8 KW typical load
  • Solar heated air floods generator enclosure,
    reduces electric heating
  • Warm air keeps engine ready to start
  • Payback period well under 10 years
  • Free storage building

New Federal Application
10
Solar energy looks better and does more than
ever before!
  • New aesthetics with building integrated
    technologies
  • New solar roofs
  • New solar walls
  • New solar applications
  • EDGs, boiler air, heat pump preheat, ventilation
    air
  • Lower installed costs
  • Higher energy delivery
  • Attractive economics
Write a Comment
User Comments (0)
About PowerShow.com