The Experts below are selected from a list of 18 Experts worldwide ranked by ideXlab platform
Greenberg, Brian H - One of the best experts on this subject based on the ideXlab platform.
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Vortexing Off A Common Suction Header
DigitalCommons@CalPoly, 2017Co-Authors: Caceres, Ryan J, Langlois, Brett R, Greenberg, Brian HAbstract:This project is the first iteration of a testing rig to determine the critical submergence of a vortex off a main Suction Header. The rig was designed with supplies purchased and provided by PG&E, including 4-6” schedule 40 PVC pipe and fittings, a large water tank, a pump, and a flowmeter. PG&E at Diablo Canyon Power Plant presented their problem to the Cal Poly Mechanical Engineering Senior Project class, and three mechanical engineers took up the project. The following report details the ideation, design, build, and test processes used during the 2016-17 academic year to create the vortex testing rig. We determined through testing that the location of hydraulic jump can be influenced by how open or closed the branch line valve was, which in turn influenced when gas ingestion to the pump occurred
Caceres, Ryan J - One of the best experts on this subject based on the ideXlab platform.
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Vortexing Off A Common Suction Header
DigitalCommons@CalPoly, 2017Co-Authors: Caceres, Ryan J, Langlois, Brett R, Greenberg, Brian HAbstract:This project is the first iteration of a testing rig to determine the critical submergence of a vortex off a main Suction Header. The rig was designed with supplies purchased and provided by PG&E, including 4-6” schedule 40 PVC pipe and fittings, a large water tank, a pump, and a flowmeter. PG&E at Diablo Canyon Power Plant presented their problem to the Cal Poly Mechanical Engineering Senior Project class, and three mechanical engineers took up the project. The following report details the ideation, design, build, and test processes used during the 2016-17 academic year to create the vortex testing rig. We determined through testing that the location of hydraulic jump can be influenced by how open or closed the branch line valve was, which in turn influenced when gas ingestion to the pump occurred
Langlois, Brett R - One of the best experts on this subject based on the ideXlab platform.
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Vortexing Off A Common Suction Header
DigitalCommons@CalPoly, 2017Co-Authors: Caceres, Ryan J, Langlois, Brett R, Greenberg, Brian HAbstract:This project is the first iteration of a testing rig to determine the critical submergence of a vortex off a main Suction Header. The rig was designed with supplies purchased and provided by PG&E, including 4-6” schedule 40 PVC pipe and fittings, a large water tank, a pump, and a flowmeter. PG&E at Diablo Canyon Power Plant presented their problem to the Cal Poly Mechanical Engineering Senior Project class, and three mechanical engineers took up the project. The following report details the ideation, design, build, and test processes used during the 2016-17 academic year to create the vortex testing rig. We determined through testing that the location of hydraulic jump can be influenced by how open or closed the branch line valve was, which in turn influenced when gas ingestion to the pump occurred
Xiaohua Liu - One of the best experts on this subject based on the ideXlab platform.
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Experimental study on refrigerant maldistribution in a fin-and-tube evaporator for a direct expansion air-conditioning system
Energy and Buildings, 2020Co-Authors: Haida Tang, Tao Zhang, Xiaohua LiuAbstract:Abstract In this paper, the design concept of the face split evaporator with a retrofitted Suction Header and choked flow in the capillary tubes was adopted to improve a direct expansion air-conditioning system with a designed air flow rate of 20,000 m3/h. The novel design of the direct expansion air-conditioning system was experimentally tested and validated. Face split evaporator reduced the refrigerant pressure drop in the Suction Header and the choked flow design limited the maximum flow rate across each branch circuit, which both contributed to the uniform refrigerant flow distribution of the improved system. Consequently, the cooling capacity and COP of the improved system was 10.5% and 13.4% higher than the original system. With the refrigerant mass flow rate of the improved system varying from 1.33 kg/s to 2.05 kg/s, the measured cooling capacity ranged 240–350 kW and the ratio of the system COP to the ideal COP of the reversed Carnot cycle with the same evaporating and condensing temperatures maintained at 0.72–0.74. The experimental results demonstrated that the improved system performed a relatively uniform refrigerant flow distribution among the branch circuit of the evaporator regardless of the refrigerant mass flow rate. This study is beneficial to the optimization design of the multi-circuit evaporator for a direct expansion air-conditioning system with a large air flow rate in engineering applications.
Haida Tang - One of the best experts on this subject based on the ideXlab platform.
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Experimental study on refrigerant maldistribution in a fin-and-tube evaporator for a direct expansion air-conditioning system
Energy and Buildings, 2020Co-Authors: Haida Tang, Tao Zhang, Xiaohua LiuAbstract:Abstract In this paper, the design concept of the face split evaporator with a retrofitted Suction Header and choked flow in the capillary tubes was adopted to improve a direct expansion air-conditioning system with a designed air flow rate of 20,000 m3/h. The novel design of the direct expansion air-conditioning system was experimentally tested and validated. Face split evaporator reduced the refrigerant pressure drop in the Suction Header and the choked flow design limited the maximum flow rate across each branch circuit, which both contributed to the uniform refrigerant flow distribution of the improved system. Consequently, the cooling capacity and COP of the improved system was 10.5% and 13.4% higher than the original system. With the refrigerant mass flow rate of the improved system varying from 1.33 kg/s to 2.05 kg/s, the measured cooling capacity ranged 240–350 kW and the ratio of the system COP to the ideal COP of the reversed Carnot cycle with the same evaporating and condensing temperatures maintained at 0.72–0.74. The experimental results demonstrated that the improved system performed a relatively uniform refrigerant flow distribution among the branch circuit of the evaporator regardless of the refrigerant mass flow rate. This study is beneficial to the optimization design of the multi-circuit evaporator for a direct expansion air-conditioning system with a large air flow rate in engineering applications.
