A standard air conditioning system uses a compressor to increase the pressure on the gas, forcing it into a liquid in the condenser coil. The change of state of the refrigerant starts to take place approximately 2/3rds of the way down the condenser.
A Solar Hybrid Air Conditioning System uses a different method. It uses the heat from the sun to superheat the refrigerant which enables it to begin changing state in the top 2/3rds of the condenser coil.
Although differing in technical maturity and commercial
status, the various solar refrigeration technologies discussed
in the previous sections are compared in terms of performance
and initial cost. The three last columns indicate
the specific cost of photovoltaic solar panels, the
specific cost of thermal solar collectors plus specific engine
costs and the specific chiller cost, respectively. Since the existing
chillers based on these technologies differ widely in cooling
capacity ranging from a few tens to several mega Watt, the
The main equipments include: CPC collector array, heat storage facility, gas boiler, turbine generator unit, and condenser, water circulating pump, valves and pipelines.
This paper designs a solar-heated generation system with
10kW of electricity generation. The steam temperature at the
inlet of turbomachine is 250? with the inlet pressure is
The analysis of four typical working processes under the
different weather conditions is as follows:
(1) When the weather is fine, the steam at the outlet of
collector with high temperature can satisfy the request of
Warm and humid air enters the slowly rotating desiccant wheel and is dehumidified by adsorption of water (1-2). Since the air is heated up by the adsorption heat, a heat recovery wheel is passed (2-3), resulting in a significant pre-cooling of the supply air stream. Subsequently, the air is humidified and thus further cooled by a controlled humidifier (3-4) according to the set-values of supply air temperature and humidity.
An adsorption Activated Carbon/Methanol air conditioning system was developed by Wang in 2001 to be powered by heat sources with temperatures close to 100 °C. Evacuated tube collectors could be used to supply hot water at this level of temperature. The system, had two adsorbers with 26 kg of carbon inside each one and used methanol as refrigerant. The COP and the SCP of this system were significantly influenced by the cycle time.
ClimateWell 10 is a solar air conditioning unit with the unique ability to store energy and to deliver cooling and heating. The patented triple-state absorption technology allows ClimateWell 10 to be the first product to make
efficient and integrated energy storage possible. The process cycles between three states of aggregation – solid, liquid and gas – allowing continuous cooling or heating output. ClimateWell 10 also works in conjunction with other thermal sources such as district heating or micro co-generation.
There are 4 loops in this single-effect absorption LiBr/Water solar air conditioning system.
1. LiBr/H2O Loop
2. Chilled Water Loop (could flow space air and cool that instead)
3. Solar Hot Water Loop
4. Cooling Water Loop (to cool condensor & absorber)(could use air)
Typical coefficient of performance (COP) for large single-effect machines are 0.7 to 0.8.
The internal operation of a lithium bromide-water
absorption chiller is intimately influenced by the pressures
and concentrations of its working fluid. In its most basic
1940: Absorption refrigerating machine using lithium bromide:
water. Studies by Servel and Carrier.
1966: The first solar LiBr based air conditioning system was installed in an experimental solar house in University of Queensland, Australia.
SplitCool DC-18 DC Heat Pump
* Height 12.1”
* Width 34.25”
* Depth 9.1”
* Air Flow 470 f3/min
* Noise Level (dB) 52 (indoor)
* Height 30.7”
* Width 38.6”
* Depth 13.6”
Max Cooling 18,000 BTU
Max Heating 20,500 BTU
Input Voltage 48 VDC (42.6 - 56v)
Bateries 6 VDC (min 8) or
12 VDC (min 4)
Baterry AH, ea. 225 – 395
Weight 165 lbs
Charge Weight 45 oz.
Compressor Brushless DC (BLDC)
Low Voltage Disconnect Yes