International Journal of Air-Conditioning and Refrigeration
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Virtual design on the heat pump refrigeration cycle: challenges and approaches
International Journal of Air-Conditioning and Refrigeration - Tập 32 Số 1
AbstractVirtual product design (VPD) of the refrigeration cycle has long been a
major subject of many engineers and manufacturers. Issues should be the question
of how simulation gets close to the real world in virtual ways. It is especially
true when we consider variable refrigerant flow (VRF) heat pumps, having various
types of indoor unit combinations, long and complicated piping configurations...
Ventilation methods to prevent the spread of airborne pathogens from teachers to students
International Journal of Air-Conditioning and Refrigeration - Tập 31 - Trang 1-12 - 2023
This study investigates different ventilation systems to prevent the spread of
airborne pathogens from teachers in an elementary school classroom setting. The
analyzed systems include a general mechanical ventilation system and a hybrid
ventilation system. The hybrid ventilation system used a combination of natural
ventilation, general mechanical ventilation, and local mechanical ventilation
syste...
Performance analysis of a novel ejector-assisted condenser outlet split dual-evaporator refrigeration system
International Journal of Air-Conditioning and Refrigeration - - 2024
The performance of an ejector-assisted condenser outlet split dual-evaporator
cycle is compared with a conventional dual-evaporator cycle albeit consisting a
pressure reducing valve. The cycles do not employ any separator due to its
inability to efficiently separate the liquid and the vapor phases. The
comparison of both the cycles has been made for the same cooling capacity in
low-temperature eva...
Tối ưu hóa việc thu hồi nhiệt của bộ trao đổi nhiệt dạng ống và bó ống với các baffle xoáy liên tục cho hệ thống thông gió bằng khí Dịch bởi AI
International Journal of Air-Conditioning and Refrigeration - Tập 32 - Trang 1-16 - 2024
Chúng tôi báo cáo một đánh giá định lượng về tác động của baffle xoáy liên tục
lên hiệu suất thu hồi nhiệt của các bộ trao đổi nhiệt dạng ống bó theo chiều đối
lưu. Góc nghiêng của baffle đã được thay đổi từ $$11^{\circ }$$ đến $$22^{\circ
}$$. Do lưu chất chảy qua bó ống theo một góc do dòng chảy xoáy bên trong vỏ, bộ
trao đổi nhiệt hoạt động theo chế độ đối lưu chéo. Các mô phỏng bằng phần mềm
F...
#bộ trao đổi nhiệt #baffle xoáy #thu hồi nhiệt #hiệu suất #thông gió
Design optimization of cross-counter flow compact heat exchanger for energy recovery ventilator
International Journal of Air-Conditioning and Refrigeration - Tập 30 - Trang 1-15 - 2022
Energy recovery ventilators (ERVs) are the key equipment to fresh air
ventilation, which is helpful for the control of respiratory diseases like
COVID-19. In this paper, design optimization of the compact heat exchanger in a
proposed heat recovery ventilator of the energy efficient building has been
carried out and discussed. Appropriate theoretical models are required to
evaluate system performan...
Effect of gas spacing and resonance frequency on theoretical performance of thermoacoustic refrigerators
International Journal of Air-Conditioning and Refrigeration - Tập 31 - Trang 1-14 - 2023
In this paper, the design and analysis of 500 W thermoacoustic refrigerators for
the temperature difference of 28 K using helium and air are discussed. Helium is
the best working gas, but air is chosen to study the possibility of replacing
helium for the future cost-effective refrigerator since it is much cheaper than
helium. Heat and work flow equations of thermoacoustic refrigerators are
discuss...
Investigating the impact of indoor temperature on the performance of the retail commercial refrigeration system
International Journal of Air-Conditioning and Refrigeration - Tập 30 - Trang 1-27 - 2022
Commercial food outlets in the UK are responsible for 3% of the UK total energy
consumption, with refrigeration systems account for 29% of this total. In this
paper, a validated model that simulates a commercial refrigeration system
installed over 2000 sq. ft to mimic a real express store installed at the
Riseholme Refrigeration Research Centre at the University of Lincoln, UK, is
presented. Inves...
Computational fluid dynamic simulation of packed bed drying process: impact of particle properties, drying conditions, and lateral edge heating modes on drying kinetics
International Journal of Air-Conditioning and Refrigeration - Tập 32 Số 1
AbstractIn this work, a two-dimensional computational fluid dynamic (CFD) model
is developed to describe the drying process of a packed bed made of spherical
particles. The volumetrical evaporation rate inside the bed is computed from the
pressure difference between the particle surface and the airflow. By using the
thermal equilibrium assumption, the heat conservation equation is derived. The
CFD...
Experimental study of the influence of pad angle on the thermal performance of a direct evaporative cooling system
International Journal of Air-Conditioning and Refrigeration - Tập 31 - Trang 1-12 - 2023
One of the most important parts of direct evaporative cooling systems is the
cooling pad. Pads vary in materials and construction features. The parameters
studied in the performance of the pads are air speed, pad thickness, geometrical
characteristics, and its configuration and the provided water flow rate. The
performance of the pads is usually determined through saturation efficiency,
pressure d...
Introduction to magnetic refrigeration: magnetocaloric materials
International Journal of Air-Conditioning and Refrigeration - Tập 31 - Trang 1-13 - 2023
This work presents a review of research work on the magnetic refrigerator, of
which different research is presented. The principle of magnetic refrigeration
at room temperature and its interests has been shown. The phase transitions,
first-order and second-order, have been shown with the advantages and
disadvantages of both. Indeed, the first-order materials benefit from high
magnetic entropy and ...
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