Abstract
The purposes of this research are to do a system simulation of air conditioning utilizing solar energy with single effect absorption refrigeration method, analyze the coefficient of performance (COP) for each absorbent-refrigerant variable and compare the effectivity of every absorbent-refrigerant variable used. COP is a constant that denotes the effeciency of a refrigeration system, that is ratio of work or useful output to the amount of work or energy input. The higher the number of COP, the more efficient the system is. Absorbent-refrigerant (working fluids) variables used in this research depend on its chemical and thermodynamics properties. Steps in this research are including data collection and tabulation from literature and do a simulation of air conditioning system both commercial air conditioning system (using electrical energy) and solar energy air conditioning system with Aspen Plus software. Next, run the simulation for each working fluid variables used and calculate the COP for each variable. Subsequently, analyze and compare the effectivity of all variables used from COP value and economical point of view with commercial air conditioning system. From the result of the simulation, can be concluded that solar air conditioning can achieve 98,85 % of energy savings than commercial air conditioning. Furthermore, from the calculation of COP, the highest COP value is achieved by solar conditioning system with LiNO3-NH3 as working fluid where 55% of the composition is the refrigerant and 45% of absorbent.
Highlights
BackgroundAir Conditioner (AC) is a sophisticated solution to cope with hot room temperatures, especially in urban areas
The application of solar energy to air conditioning systems has several advantages, in addition to offering solutions of negative impacts that have been described earlier, this technology has the advantage: 1. The maximum cooling load is equal to the maximum available radiation 2
Based on the economic analysis that has been done, it can be seen that solar air conditioning system is more economically advantageous compared with commercial air conditioner
Summary
Air Conditioner (AC) is a sophisticated solution to cope with hot room temperatures, especially in urban areas. Adding an energy load to an AC installation will accelerate global warming and greenhouse effects. Two-thirds of the total energy is used for buildings, where 30-50% of electricity consumption in buildings is dominated by air conditioning systems. The negative effects of this increase in energy consumption include: 1. The increasing demand of air-conditioning systems will lead to increased consumption of electricity that will be associated with greenhouse gas emissions. The application of solar energy to air conditioning systems has several advantages, in addition to offering solutions of negative impacts that have been described earlier, this technology has the advantage: 1. The working fluids used are harmless, such as water and salt solution Current technologies for the production of air conditioners using thermal energy are: absorption chiller, liquid-solid desiccant, and solid adsorption
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