Abstract:
Convenience stores operating 24 hours a day consume substantial amounts of energy due to the continuous operation of critical systems such as air conditioning, lighting, and refrigeration. Air conditioning is the most significant energy consumer, resulting in high operational energy costs. This study analyzes the feasibility of designing energy-efficient convenience stores to reduce operational costs and enhance energy efficiency. The research involves retrofitting the building envelope from lightweight concrete walls to sandwich panels and upgrading air conditioning systems from split-type to cassette-type. Energy simulations were conducted using EnergyPlus and OpenStudio to evaluate energy performance, construction costs, and economic returns. The findings reveal that using sandwich panels for building envelopes reduces heat transfer into the building, lowers air conditioning loads, and decreases annual energy consumption by 15-20%, saving approximately 30,000-40,000 THB per year. Construction costs were reduced by 15-20%, equating to savings of 160,000-320,000 THB, while construction time was shortened by over 30%, or approximately 36 days. The cassette-type air conditioning systems enhanced energy efficiency and provided uniform cooling throughout the store. This research demonstrates the investment cost and energy-saving potential of designing energy-efficient convenience stores. The findings provide valuable insights and strategies for optimizing energy usage and can be applied to other commercial buildings, prioritizing energy conservation and long-term sustainability.