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مكيفات بالطاقة الشمسية

VICOT Solar Air Conditioning System

Vicot Solar Air Conditioning System Using Thermally Activated Absorption Technology Content •

1. Solar air conditioning system diagram • 2. solar air conditioning operation principle • 3. Variable Speed Absorption Chiller • 4. High Efficiency Medium Temperature Solar Collectors • 5. Ice/Heat Storage System • 6. Controls • 7. Economic Analysis • 8. Conclusion

1. Solar air conditioning system diagram

2. solar air conditioning control principle

   Solar energy is main drive for solar air conditioning, and natural gas as a supplementary energy for air conditioning system, after the system received cooling command, the system will determine whether the irradiance is greater than 350 w/m2, if irradiance greater than 350 w/m2, the collectors will begin to work for collecting the heat for solar air conditioning and heating up the working medium, before the medium temperature has not met 150℃, which is the solar air conditioning start temperature, air conditioning will start to work of using natural gas, when the working medium temperature exceeds 150℃, it will automatically switch to use high temperature working medium model, then the system will determine whether the unit cooling capacity can meet the demand for air conditioning load, if so, it will stop using natural gas. If not, the unit will be based on the difference value between customer demand for cooling capacity and the actual cooling capacity of the unit, and use natural gas to compensate. When the working medium temperature below 150℃, the system will automatically switch to gas mode. When the system's cooling capacity exceeds demand of air conditioning load, the system will issue command to the chiller to ice storage the exceed part of load, when demand for air conditioning load is 0, the system will carry out ice storage and energy storage. When there is a need for the air conditioning load, and the irradiance is less than 350 w/m2, the system will first use ice storage, if ice is not enough, it will start to use the gas compensation mode. When the system received heating command, first to determine whether the solar irradiance is greater than 350 w/m2, the collector will start to work when irradiance more than 350 w/m2, also for heat storage to store energy, and at the same time to supply heat to customers, if the irradiance is less than 350 w/m2, thermal storage device temperature is above 80℃,it will use heat storage for heating. 3. Variable Speed Absorption Chiller

3.1. Product View

3.2 General Features:

  • • Patented Technology for First Ever Continuously Variable Speed Operation
  • • Operates with Solar, Natural Gas or Co-Firing with Both Energy Sources
  • • Nominal 5 ton (17.5 kW) Cooling Capacity, Slightly De-rated for Ice-making Capability
  • • Nominal 0.70 Overall COP by Gas, 0.80 Thermal COP by Solar with higher COP at Part Load Conditions and During Seasonal Operation
  • • Can Produce Chilled Glycol To Temperatures of -8°C for Ice-making
  • • Intelligent Controls for Load Matching for Optimal Efficiency
  • • Low NOx burner, Extremely Clean Burning

3.3. Distinguishing Features

  • – Continuously Variable Speed Operation
  • – Unitary Links (Multiple Units) with Simultaneous Variable Speed Turndown
  • – High Efficiency Components with Wetting at Turndown Conditions
  • – Microprocessor Based Controls
  • – Pulsing Thermal Expansion Valve
  • – Low NOx Burner
  • – Advanced Direct Drive Solution Pump
  • – Non-Toxic Corrosion Inhibitor

3.4. Product internal view

Chiller Operation with COP = 0.7

3.5. Test Chamber Chiller Efficiency Confirmation at 95 F (Third party audited and verified within 1.5%)

3.6. Major Components Description and Function

  • – Generator – Heats and Distills Solution to Provide Ammonia Vapor (99.5%) and Liquid Water (4%)
  • – SCA/GAX Absorber – Provides Suction to Evaporator Using Weak Solution as well as Heat Recovery
  • – Solution Pump – Pumps Strong Solution from Low to High Pressure
  • – Condenser – Rejects Heat and Provides Condensate
  • – PTXV – Provides Expansion of Ammonia and Controls the Refrigeration Effect
  • – Evaporator – Accepts Heat Input to Liquid and Provides Vapor to Absorber
  • – Air Coil Condenser Portion Rejects Heat and Provides Condensate, Absorber Portion Completes Absorption of Ammonia and Rejects Heat