**2. Need of renewable based technology**

The use of renewable energy is gaining attention and lot of work still need to be done for different technologies. The overall world energy consumption is presented in **Figure 3**. The increasing use of fossil fuels not only causing fast depletion of energy sources but also causes emitting harmful gases which directly affects the human life. A summary of direct and indirect effects of climatic changes due to burning of these fossil fuels are illustrated in **Figure 4** [11]. Understanding the above mentioned hidden impacts of fossil fuels is critical for evaluating the true cost of fossil fuels—and for promoting our choices for future energy production. These hidden costs must be considered while comparing feasibility of clean energy sources.

Furthermore, major part of the primary energy consumed in the building is accounted for cooling or heating. With regard to the use of energy consumption for HVAC technology, its demand is increasing rapidly, as shown in **Figure 5** [1]. This increasing use of HVAC technology encourages developing alternative cooling technologies which can efficiently utilize renewable energy for its operation.

**Figure 4.** Direct and indirect effects of climate change on public health [11].

demand, Cleveland, OH, USA.

**Figure 5.** HVAC equipment demand and annual growth. Source: The Freedonia group, Inc. world HVAC equipment

Renewable and Sustainable Air Conditioning http://dx.doi.org/10.5772/intechopen.73166 125

**Figure 3.** The world's energy consumption according to data of 2015. Source: BP statistical review of world energy 2016.

**Figure 4.** Direct and indirect effects of climate change on public health [11].

make this technology with market friendly. In this regard, the major aim of this chapter is to introduce with the concept of alternative cooling technology, its need and recent developments. Different cooling cycles which can be employed for better performance of the system have been described in this chapter. Based on the developed mathematical model, a comparison has been made between two different configurations of desiccant cooling

The use of renewable energy is gaining attention and lot of work still need to be done for different technologies. The overall world energy consumption is presented in **Figure 3**. The increasing use of fossil fuels not only causing fast depletion of energy sources but also causes emitting harmful gases which directly affects the human life. A summary of direct and indirect effects of climatic changes due to burning of these fossil fuels are illustrated in **Figure 4** [11]. Understanding the above mentioned hidden impacts of fossil fuels is critical for evaluating the true cost of fossil fuels—and for promoting our choices for future energy production. These hidden costs must be considered while comparing feasibility of clean energy

Furthermore, major part of the primary energy consumed in the building is accounted for cooling or heating. With regard to the use of energy consumption for HVAC technology, its demand is increasing rapidly, as shown in **Figure 5** [1]. This increasing use of HVAC technology encourages developing alternative cooling technologies which can efficiently utilize

**Figure 3.** The world's energy consumption according to data of 2015. Source: BP statistical review of world energy 2016.

system.

124 Sustainable Air Conditioning Systems

sources.

renewable energy for its operation.

**2. Need of renewable based technology**

**Figure 5.** HVAC equipment demand and annual growth. Source: The Freedonia group, Inc. world HVAC equipment demand, Cleveland, OH, USA.
