Energy performance analysis between two air conditioning systems used in an educational Building in warm-climate

M Balbis-Morejón,J I Silva-Ortega,J Castro-Peña

doi:10.1088/1757-899x/844/1/012031

M Balbis-Morejón, J I Silva-Ortega + Show 1 more

Open Access

https://doi.org/10.1088/1757-899x/844/1/012031

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Abstract

Energy saving measures, in the design air conditioning systems, are crucial in the development of energy schemes with rational energy consumption. Traditionally, integrated buildings systems have been assessed individually to optimize the energy performance, however they have different parameters that affect energy performance that demands the use of detailed analysis using dynamic simulation. This paper is focused on compare an air conditioning system to be implemented in educational buildings in warm-climate, considering energy schemes provide for a constant air volume (CAV) flow system with a water chiller, while the other integrates a variable refrigerant flow (VRF) system. Adding in each case dedicated outdoor air System (DOAS) units. Energy consumption achieved by each AC system is obtained considering the configuration achieving energy savings of 40% of the annual electricity demand for cooling. Finally, the use of DOAS represents an increase of 20% of total electricity consumption.

Highlights

According to the Energy Information Administration (EIA), estimations, energy consumption will increase approximately in 56% in all regions during the following three decades, this percentage is led by residential and commercial sector with 51 %, industry with 47%, and transportation with a 2 % [1]
This paper is focused on compare an air conditioning system to be implemented in educational buildings in warm-climate, considering energy schemes provide for a constant air volume (CAV) flow system with a water chiller, while the other integrates a variable refrigerant flow (VRF) system
The computational tool for the detailed analysis considered dynamic simulation using Energy Plus V.8.4 (E +), which provides excellent reference points in the modelling of energy demand in buildings and mechanical equipment that admit the detailed configuration of the system of generation, transportation and final distribution; The modelling of the educational building of the University was carried out to simulate the energy performance of the technological variants as viable alternatives to cover the energy needs that the building can demand to achieve thermal comfort

Summary

Introduction

According to the Energy Information Administration (EIA), estimations, energy consumption will increase approximately in 56% in all regions during the following three decades, this percentage is led by residential and commercial sector with 51 %, industry with 47%, and transportation with a 2 % [1]. Colombia posts an annual and sustained growth of 3.7% of electric consumption, being the commercial and public services, the fastest-growing sector (5.6%) [2], which is characterized for the high energy consumption of heating, ventilation and air conditioning (HVAC) systems, which is approximately between 40% to 60% of the total electricity consumption of buildings [3,4]. As a result of this behavior, mature economies have developed programs that have allowed the establishment of good practices in the construction sector, without compromising the comfort conditions. These good practices require verification through a detailed analysis of factors that affect the final consumption of energy in a building [6,7,8,9]

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