Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
STUDY OF COST REDUCTION AND APPLICATION OF ENERGY EFFICIENCY IN THE LIGHTING AND AIR CONDITIONING SYSTEMS OF IFES CAMPUS SÃO MATEUS
Submission Author:
Vinícius Francisco do Nascimento , ES , Brazil
Co-Authors:
Vinícius Francisco do Nascimento, Rodrigo Fiorotti, Igor Belisario, Bruno de Oliveira Schneider
Presenter: Bruno de Oliveira Schneider
doi://10.26678/ABCM.COBEM2021.COB2021-2043
Abstract
Lighting and air conditioning systems are among the main end uses of energy consumption in Brazil. It is estimated that 44% of the electricity consumed in the commercial and public services sectors are due to lighting, whereas in buildings, 60% of the electricity is spent on air conditioning. At Ifes Campus São Mateus, about 20% of all funds is used to pay electricity bills, representing a considerable percentage. In sight of this, the present work aims to identify poorly dimensioned systems and propose actions to reduce the energy bill. Initially, the verification was made that the installed lamps were in accordance with the recommended standards, followed by the luminotechnical calculation. In order to find the ideal scenario of the analyzed environment and the feasibility analysis of possible replacements of the lamps by LEDs were made through the calculation of payback. For air conditioning systems, a comparison was evaluated considering thermal load and actual system installed capacity of each environment analyzed, since some structural changes have been made at the institute. In addition, it was proposed solutions in order to reduce energy costs by reducing the thermal load and/or using more efficient equipment. The results showed that the analyzed rooms were with average illuminance, however, the current lamps should be replaced by OLTUBOLEDT8 lamps (18W) to reduce the cost, representing a monthly savings of R$ 126.58 and a payback of 10.91 months. Regarding air conditioning systems, in 4 out of 5 facilities analyzed were either undersized or oversized. The energy costs by air conditioning can be reduced by 8.37% trough thermal load reduction, just considering the classrooms chilled with internal temperature at 24°C, representing a monthly reduction of R$316.66. The results achieved contributed to demonstrate that simple solutions can have a positive impact in the institution's electric bill.
Keywords
Lighting, air conditioning, energy efficiency, electricity, Cost Reduction
