Energy Analysis for the Solar Thermal Cooling System in Universitas Indonesia

Abstract

The objective of this study is to analyze all the energy used in the solar cooling system in Universitas Indonesia. This system uses three energies at the same time, namely, solar, gas and electricity energies, which are used to provide a required cooling capacity from the mechanical research center (MRC) building in Universitas Indonesia. The single–double-effect absorption chiller is the main component of the solar thermal cooling system to provide the chilled water that is circulated between the system and MRC building. In this system, heat from solar energy is absorbed by the evacuated tube solar collector and then transferred to the hot water that is used to generate vapor together with the gas at the absorption machine. On the other hand, electricity is mostly consumed by the pumps to circulate the hot, cooling and chilled water, also the working fluids inside the absorption machine. Finally, all the energies used to create a thermal comfort zone in the MRC building based on the Indonesia weathers are reported in this paper.

Technologies for Air Condiotioning Powered by Alternative Energy Sources a Brief Review

“…Due to their simple installation and reliability, PV became applicable, efficient, economically viable and when associated with thermal collectors (T) -PV/T system -they offer new fields of application offering economic and energy benefits [13] [14]. The single-effect aircooled lithium bromide water absorption chiller (LiBr-H2O) has shown advantages in residential applications and shows to be promising in reducing electrical consumption [15]. When combined with natural gas (SAE) they present satisfactory energy performance [12].…”

“…When associated with natural gas, they show satisfactory performance [15] They may have payback between 4 and 5 years [28].…”

“…Significantly reduces CO2 emissions per year [15] Absorption Chiller -Natural Gas They are efficient and when combined with thermal waste they are promising [28,19] Feasible, however, government incentives directly influence [29].…”

Technologies for Air Conditioning Powered by Alternative Energy Sources: A Brief Review

“…When associated with thermal collectors (T) -PV/T systems -they offer new fields of application offering economic and energy benefits [13,14]. The single-effect air-cooled lithiumbromide-water absorption chiller (LiBr-H2O) presents advantages in residential applications and 3 rd ) evaluate the energy, economic and environmental aspects of alternative energy has shown to be promising in reducing electrical consumption [15]. Combined with natural gas (SAE), they present satisfactory energy performance [12].…”

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“…Refrigerant as a working fluid can be chosen must have characteristic a large latent heat, pressure must not too high so that the compressor power is low, non-tonic, non-flammable, non-corrosive, environmentally friendly, and low cost [4,5]. The problem is hydrocarbon refrigerant has flammable [6,7]. Guidelines that can be used to select the refrigerant pair in the CRS are refrigeration on the HTC should use refrigerant that have high COP, and on the LTC side which has low COP, low pressure [8].…”