Effects of reducing internal heat load on the operation of multi-split type air conditioning system in an office

Sayana Tsushima; Shuhei Takahashi; Emi Takai; Junta Fujisawa; Shinichi Tanabe; Hiromasa Tanaka; Hisataka Kitora

Effects of reducing internal heat load on the operation of multi-split type air conditioning system in an office

Sayana Tsushima^*, Shuhei Takahashi, Emi Takai, Junta Fujisawa, Shinichi Tanabe, Hiromasa Tanaka, Hisataka Kitora

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In this study, the internal heat load and operation of an HVAC system were investigated in an office drawing low internal heat load where multi-split type air conditioning system were adopted. Field and questionnaire surveys and an energy consumption analysis were performed. The designed total cooling capacity of the HVAC system was 158 W/m², relatively small compared to most systems that have had a 200 W/m² capacity. However, the average load factor was below 30%. Moreover, it was found that the operation of a dedicated outdoor air system had a large influence on the total electric energy consumption in offices practicing internal load reduction, and that the main cause for the operation change was the humidity setting of the system. Introducing air-conditioning systems with an appropriate smaller capacity and a comprehensive energy-saving operation method, rather than partially optimizing each device, would be beneficial in terms of total energy saving.

Original language	English
Title of host publication	Healthy Buildings Europe 2017
Publisher	International Society of Indoor Air Quality and Climate
ISBN (Print)	9788379472604
Publication status	Published - 2017 Jan 1
Event	Healthy Buildings Europe 2017, HB 2017 - Lublin, Poland Duration: 2017 Jul 2 → 2017 Jul 5

Other

Other	Healthy Buildings Europe 2017, HB 2017
Country/Territory	Poland
City	Lublin
Period	17/7/2 → 17/7/5

Keywords

Air conditioning (HVAC) system
Energy consumption
Heating
Low internal heat load office
Ventilation

ASJC Scopus subject areas

Civil and Structural Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Cite this

@inproceedings{46fc381ac64c43869bfd7c0c2ef3193e,

title = "Effects of reducing internal heat load on the operation of multi-split type air conditioning system in an office",

abstract = "In this study, the internal heat load and operation of an HVAC system were investigated in an office drawing low internal heat load where multi-split type air conditioning system were adopted. Field and questionnaire surveys and an energy consumption analysis were performed. The designed total cooling capacity of the HVAC system was 158 W/m2, relatively small compared to most systems that have had a 200 W/m2 capacity. However, the average load factor was below 30%. Moreover, it was found that the operation of a dedicated outdoor air system had a large influence on the total electric energy consumption in offices practicing internal load reduction, and that the main cause for the operation change was the humidity setting of the system. Introducing air-conditioning systems with an appropriate smaller capacity and a comprehensive energy-saving operation method, rather than partially optimizing each device, would be beneficial in terms of total energy saving.",

keywords = "Air conditioning (HVAC) system, Energy consumption, Heating, Low internal heat load office, Ventilation",

author = "Sayana Tsushima and Shuhei Takahashi and Emi Takai and Junta Fujisawa and Shinichi Tanabe and Hiromasa Tanaka and Hisataka Kitora",

year = "2017",

month = jan,

day = "1",

language = "English",

isbn = "9788379472604",

booktitle = "Healthy Buildings Europe 2017",

publisher = "International Society of Indoor Air Quality and Climate",

note = "Healthy Buildings Europe 2017, HB 2017 ; Conference date: 02-07-2017 Through 05-07-2017",

}

TY - GEN

T1 - Effects of reducing internal heat load on the operation of multi-split type air conditioning system in an office

AU - Tsushima, Sayana

AU - Takahashi, Shuhei

AU - Takai, Emi

AU - Fujisawa, Junta

AU - Tanabe, Shinichi

AU - Tanaka, Hiromasa

AU - Kitora, Hisataka

PY - 2017/1/1

Y1 - 2017/1/1

N2 - In this study, the internal heat load and operation of an HVAC system were investigated in an office drawing low internal heat load where multi-split type air conditioning system were adopted. Field and questionnaire surveys and an energy consumption analysis were performed. The designed total cooling capacity of the HVAC system was 158 W/m2, relatively small compared to most systems that have had a 200 W/m2 capacity. However, the average load factor was below 30%. Moreover, it was found that the operation of a dedicated outdoor air system had a large influence on the total electric energy consumption in offices practicing internal load reduction, and that the main cause for the operation change was the humidity setting of the system. Introducing air-conditioning systems with an appropriate smaller capacity and a comprehensive energy-saving operation method, rather than partially optimizing each device, would be beneficial in terms of total energy saving.

AB - In this study, the internal heat load and operation of an HVAC system were investigated in an office drawing low internal heat load where multi-split type air conditioning system were adopted. Field and questionnaire surveys and an energy consumption analysis were performed. The designed total cooling capacity of the HVAC system was 158 W/m2, relatively small compared to most systems that have had a 200 W/m2 capacity. However, the average load factor was below 30%. Moreover, it was found that the operation of a dedicated outdoor air system had a large influence on the total electric energy consumption in offices practicing internal load reduction, and that the main cause for the operation change was the humidity setting of the system. Introducing air-conditioning systems with an appropriate smaller capacity and a comprehensive energy-saving operation method, rather than partially optimizing each device, would be beneficial in terms of total energy saving.

KW - Air conditioning (HVAC) system

KW - Energy consumption

KW - Heating

KW - Low internal heat load office

KW - Ventilation

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M3 - Conference contribution

AN - SCOPUS:85053919910

SN - 9788379472604

BT - Healthy Buildings Europe 2017

PB - International Society of Indoor Air Quality and Climate

T2 - Healthy Buildings Europe 2017, HB 2017

Y2 - 2 July 2017 through 5 July 2017

ER -

Effects of reducing internal heat load on the operation of multi-split type air conditioning system in an office

Abstract

Other

Keywords

ASJC Scopus subject areas

UN SDGs

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