BUILELIB ENGINEERING REFERENCE

Builelib Calculation Logic

Technical documentation for the equations, variables, and calculation procedures used by Builelib to estimate the annual primary energy consumption of non-residential buildings.

This section explains the calculation method of primary energy consumption in Builelib.

Chapter 1Calculation of Design Primary Energy ConsumptionReview the systems subject to evaluation, databases, common constants, and other relevant information. Chapter 2Air-conditioning SystemsReview the method for calculating the design primary energy consumption of air-conditioning systems. Chapter 3Mechanical Ventilation SystemsReview the method for calculating the design primary energy consumption of mechanical ventilation systems. Chapter 4Lighting SystemsReview the method for calculating the design primary energy consumption of lighting systems. Chapter 5Hot Water Supply SystemsReview the method for calculating the design primary energy consumption of hot water supply systems. Chapter 6ElevatorsReview the method for calculating the design primary energy consumption of elevators. Chapter 7Photovoltaic SystemsReview the calculation of photovoltaic generation and the resulting primary energy reduction. Chapter 8CogenerationReview the method for calculating primary energy savings achieved through cogeneration. Chapter 9Other Primary Energy ConsumptionReview the method for calculating the primary energy consumption of office equipment and similar devices. Chapter 10Calculation of Standard Primary Energy ConsumptionReview the method for calculating standard primary energy consumption.

About this site

This website provides technical documentation for reviewing the calculation logic used in Builelib. The calculation logic used in Builelib is based on the evaluation methodology of Japan’s Building Energy Efficiency Standards for non-residential buildings, with various additional calculation methods developed specifically for Builelib. Please note that, as a result, Builelib does not necessarily produce the same results as the official Web Program used for evaluating compliance with the Building Energy Efficiency Standards.