A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Urban building energy modeling considering the heterogeneity of HVAC system stock: A case study on Japanese office building stock
Highlights HVAC system stock is heterogeneous and changes over time. A HVAC stock modeling and an archetype building energy modeling were integrated. Disregard of the heterogeneity and its change can cause error in energy modeling. Energy reduction by technological innovation relies on the share of the HVAC stock.
Abstract Urban building energy model (UBEM) is an important tool in coping with energy issues of building sector. This paper focuses on an issue that the stock of heating, ventilation, and air-conditioning (HVAC) systems has been oversimplified in UBEM without considering its heterogeneity. It has been observed that this oversimplification may incur a significant error in the result. To address this issue, this paper proposes a framework that integrates a logistic regression based HVAC system stock modeling method and the bottom-up type engineering modeling method using building archetypes considering HVAC system configurations. A case study with Japanese office building stock revealed that (1) the disregard of the heterogeneity resulted in an error of 15% in the annual primary energy consumption, (2) the historical change in the HVAC system stock could decrease the consumption up to 5%, and (3) its composition has a significant influence on the energy saving due to energy efficiency increase in heat source machines used in HVAC systems. The presented method would contribute not only to improving the reliability of UBEM but also to providing an analytical capability of considering energy efficiency technologies related to HVAC systems along with the alternation of technology selection in the building stock.
Urban building energy modeling considering the heterogeneity of HVAC system stock: A case study on Japanese office building stock
Highlights HVAC system stock is heterogeneous and changes over time. A HVAC stock modeling and an archetype building energy modeling were integrated. Disregard of the heterogeneity and its change can cause error in energy modeling. Energy reduction by technological innovation relies on the share of the HVAC stock.
Abstract Urban building energy model (UBEM) is an important tool in coping with energy issues of building sector. This paper focuses on an issue that the stock of heating, ventilation, and air-conditioning (HVAC) systems has been oversimplified in UBEM without considering its heterogeneity. It has been observed that this oversimplification may incur a significant error in the result. To address this issue, this paper proposes a framework that integrates a logistic regression based HVAC system stock modeling method and the bottom-up type engineering modeling method using building archetypes considering HVAC system configurations. A case study with Japanese office building stock revealed that (1) the disregard of the heterogeneity resulted in an error of 15% in the annual primary energy consumption, (2) the historical change in the HVAC system stock could decrease the consumption up to 5%, and (3) its composition has a significant influence on the energy saving due to energy efficiency increase in heat source machines used in HVAC systems. The presented method would contribute not only to improving the reliability of UBEM but also to providing an analytical capability of considering energy efficiency technologies related to HVAC systems along with the alternation of technology selection in the building stock.
Urban building energy modeling considering the heterogeneity of HVAC system stock: A case study on Japanese office building stock
Kim, Bumjoon (author) / Yamaguchi, Yohei (author) / Kimura, Shun (author) / Ko, Yumei (author) / Ikeda, Kosuke (author) / Shimoda, Yoshiyuki (author)
Energy and Buildings ; 199 ; 547-561
2019-07-11
15 pages
Article (Journal)
Electronic Resource
English
Building archetypes , Office buildings stock , Urban building energy modeling , HVAC system stock , EnergyPlus , AHU , Air handling unit , AIC , Akaike's information criterion , BCSD , Building construction survey data , CAV , Constant air volume , COP , Coefficient of performance , DECC , Database for energy consumption of commercial buildings , ERV , Energy recovery ventilator , EUI , Energy use intensity , FCU , Fan coil unit , HDD , Heating degree days , HEX , Total heat exchanger , HHV , Higher heating value , HVAC , Heating, ventilation, and air conditioning , OHU , Outdoor air handling unit , PD , Population density , PMV , Predicted mean vote , PT , Person trip , SHASE , The society of heating, air-conditioning, and sanitary engineers of Japan , TFA , Total floor area , UBEM , Urban building energy model , VAV , Variable air volume , VRF , Variable refrigeration flow heat pump , WWR , Window/wall ratio