Verification of Energy Reduction Effect through Control Optimization of Supply Air Temperature in VRF-OAP System
Abstract
This paper developed an algorithm that controls the supply air temperature in the variable refrigerant flow (VRF), outdoor air processing unit (OAP) system, according to indoor and outdoor temperature and humidity, and verified the effects after applying the algorithm to real buildings. The VRF-OAP system refers to a heating, ventilation, and air conditioning (HVAC) system to complement a ventilation function, which is not provided in the VRF system. It is a system that supplies air indoors by heat treatment of outdoor air through the OAP, as a number of indoor units and OAPs are connected to the outdoor unit in the VRF system simultaneously. This paper conducted experiments with regard to changes in efficiency and the cooling capabilities of each unit and system according to supply air temperature in the OAP using a multicalorimeter. Based on these results, an algorithm that controlled the temperature of the supply air in the OAP was developed considering indoor and outdoor temperatures and humidity. The algorithm was applied in the test building to verify the effects of energy reduction and the effects on indoor temperature and humidity. Loads were then changed by adjusting the number of conditioned rooms to verify the effect of themore »
- Authors:
-
[2];
- Samsung LED, R&D Inst., Suwon (Republic of Korea)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Building Technologies Research and Integration Center (BTRIC)
- Gyeongsang National University (GNU), Korea. Dept. of Architectural Engineering (ERI)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE; National Research Foundation of Korea (NRF)
- OSTI Identifier:
- 1422474
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Energies
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 1; Journal ID: ISSN 1996-1073
- Publisher:
- MDPI AG
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; variable refrigerant system (VRF); outdoor air processing unit (OAP); control algorithm; experiment; field test; energy savings
Citation Formats
Lee, Je, Yoon, Hyun, Im, Piljae, and Song, Young-hak. Verification of Energy Reduction Effect through Control Optimization of Supply Air Temperature in VRF-OAP System. United States: N. p., 2017.
Web. doi:10.3390/en11010049.
Lee, Je, Yoon, Hyun, Im, Piljae, & Song, Young-hak. Verification of Energy Reduction Effect through Control Optimization of Supply Air Temperature in VRF-OAP System. United States. https://doi.org/10.3390/en11010049
Lee, Je, Yoon, Hyun, Im, Piljae, and Song, Young-hak. Wed .
"Verification of Energy Reduction Effect through Control Optimization of Supply Air Temperature in VRF-OAP System". United States. https://doi.org/10.3390/en11010049. https://www.osti.gov/servlets/purl/1422474.
@article{osti_1422474,
title = {Verification of Energy Reduction Effect through Control Optimization of Supply Air Temperature in VRF-OAP System},
author = {Lee, Je and Yoon, Hyun and Im, Piljae and Song, Young-hak},
abstractNote = {This paper developed an algorithm that controls the supply air temperature in the variable refrigerant flow (VRF), outdoor air processing unit (OAP) system, according to indoor and outdoor temperature and humidity, and verified the effects after applying the algorithm to real buildings. The VRF-OAP system refers to a heating, ventilation, and air conditioning (HVAC) system to complement a ventilation function, which is not provided in the VRF system. It is a system that supplies air indoors by heat treatment of outdoor air through the OAP, as a number of indoor units and OAPs are connected to the outdoor unit in the VRF system simultaneously. This paper conducted experiments with regard to changes in efficiency and the cooling capabilities of each unit and system according to supply air temperature in the OAP using a multicalorimeter. Based on these results, an algorithm that controlled the temperature of the supply air in the OAP was developed considering indoor and outdoor temperatures and humidity. The algorithm was applied in the test building to verify the effects of energy reduction and the effects on indoor temperature and humidity. Loads were then changed by adjusting the number of conditioned rooms to verify the effect of the algorithm according to various load conditions. In the field test results, the energy reduction effect was approximately 15–17% at a 100% load, and 4–20% at a 75% load. However, no significant effects were shown at a 50% load. The indoor temperature and humidity reached a comfortable level.},
doi = {10.3390/en11010049},
journal = {Energies},
number = 1,
volume = 11,
place = {United States},
year = {Wed Dec 27 00:00:00 EST 2017},
month = {Wed Dec 27 00:00:00 EST 2017}
}
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Works referenced in this record:
Integration of variable refrigerant flow and heat pump desiccant systems for the cooling season
journal, June 2010
- Aynur, Tolga N.; Hwang, Yunho; Radermacher, Reinhard
- Applied Thermal Engineering, Vol. 30, Issue 8-9
Energy performance of direct expansion air handling unit in office buildings
journal, July 2014
- Yun, Geun Young; Choi, Jongdae; Kim, Jeong Tai
- Energy and Buildings, Vol. 77
Simulation comparison of VAV and VRF air conditioning systems in an existing building for the cooling season
journal, November 2009
- Aynur, Tolga N.; Hwang, Yunho; Radermacher, Reinhard
- Energy and Buildings, Vol. 41, Issue 11
Energy simulation in the variable refrigerant flow air-conditioning system under cooling conditions
journal, February 2007
- Zhou, Y. P.; Wu, J. Y.; Wang, R. Z.
- Energy and Buildings, Vol. 39, Issue 2
Modeling and energy simulation of the variable refrigerant flow air conditioning system with water-cooled condenser under cooling conditions
journal, September 2009
- Li, Yueming; Wu, Jingyi; Shiochi, Sumio
- Energy and Buildings, Vol. 41, Issue 9
Experimental evaluation and simulation of a variable refrigerant- flow (VRF) air-conditioning system with outdoor air processing unit
journal, July 2017
- Park, Doo Yong; Yun, Gyeong; Kim, Kang Soo
- Energy and Buildings, Vol. 146
Dynamic target high pressure control of a VRF system for heating energy savings
journal, February 2017
- Yun, Geun Young; Lee, Je Hyeon; Kim, Inhan
- Applied Thermal Engineering, Vol. 113
Evaluation of energy savings potential of variable refrigerant flow (VRF) from variable air volume (VAV) in the U.S. climate locations
journal, November 2017
- Kim, Dongsu; Cox, Sam J.; Cho, Heejin
- Energy Reports, Vol. 3
Development and application of the load responsive control of the evaporating temperature in a VRF system for cooling energy savings
journal, March 2016
- Yun, Geun Young; Lee, Je Hyeon; Kim, Han Jun
- Energy and Buildings, Vol. 116
Simulation and optimization of multi-split variable refrigerant flow systems
journal, December 2018
- Alahmer, Ali; Alsaqoor, Sameh
- Ain Shams Engineering Journal, Vol. 9, Issue 4
Control and energy simulation of variable refrigerant flow air conditioning system combined with outdoor air processing unit
journal, March 2014
- Zhu, Yonghua; Jin, Xinqiao; Du, Zhimin
- Applied Thermal Engineering, Vol. 64, Issue 1-2
Field performance measurements of a heat pump desiccant unit in dehumidification mode
journal, January 2008
- Aynur, T. N.; Hwang, Y. H.; Radermacher, R.
- Energy and Buildings, Vol. 40, Issue 12
Integration of variable refrigerant flow and heat pump desiccant systems for the heating season
journal, April 2010
- Aynur, Tolga N.; Hwang, Yunho; Radermacher, Reinhard
- Energy and Buildings, Vol. 42, Issue 4
Integration of variable refrigerant flow and heat pump desiccant systems for the cooling season
journal, June 2010
- Aynur, Tolga N.; Hwang, Yunho; Radermacher, Reinhard
- Applied Thermal Engineering, Vol. 30, Issue 8-9
Simulation and optimization of multi-split variable refrigerant flow systems
journal, December 2018
- Alahmer, Ali; Alsaqoor, Sameh
- Ain Shams Engineering Journal, Vol. 9, Issue 4
Field performance measurements of a heat pump desiccant unit in dehumidification mode
journal, January 2008
- Aynur, T. N.; Hwang, Y. H.; Radermacher, R.
- Energy and Buildings, Vol. 40, Issue 12
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