Wang Yu

Bio: Wang Yu is an academic researcher from China University of Petroleum. The author has contributed to research in topics: Heat exchanger & Condenser (heat transfer). The author has an hindex of 1, co-authored 3 publications receiving 9 citations.

Discontinuous fin-separated heat pipe new fan and production method thereof

Abstract: The invention relates to the field of new fan machinery, in particular to a discontinuous fin-separated heat pipe new fan The discontinuous fin-separated heat pipe new fan comprises a condenser and a evaporator The condenser is located above the evaporator The upper end of the condenser is connected with the upper end of the evaporator through a steam riser The lower end of the condenser is connected with the lower end of the evaporator through a condensate downcomer Each of the exhaust opening of the condenser and the new air feed inlet of the evaporator is provided with an axial flow fan The fins of the condenser and the evaporator are divided into two parts which are in left-right staggered arrangement, and the part with more fins is disposed on the air inlet side By dividing the fins into two parts in left-right staggered arrangement, air turbulence can be generated at the staggered parts of the fins, air speed is reduced, turbulence heat exchange intensity is increased, heat exchange is intensified, and good heat exchange effect of the whole heat exchange element is achieved while metal consumption and heat exchange area are not increased; air speed is lowered to increase heat exchange time, and air and work medium heat exchange efficiency is increased

Discontinuous-fin separating type heat tube fresh air machine

Abstract: The utility model relates to the field of fresh air machinery, in particular to a discontinuous-fin separating type heat tube fresh air machine The discontinuous-fin separating type heat tube fresh air machine comprises a condenser and an evaporator, wherein the condenser is arranged on the top of the evaporator, the upper end of the condenser is connected with the upper end of the evaporator through a steam ascending tube, the lower end of the condenser is connected with the lower end of the evaporator through a condensate descending tube, an exhaust outlet of the condenser and a fresh air supply opening of the evaporator are respectively provided with an axial flow fan, fins of the condenser are divided into two portions and are arranged in a left-and-right staggered mode, fins of the evaporator are divided into two portions and are arranged in a left-and-right staggered mode, and each portion with the fins larger in number is arranged on the air inlet side Due to the fact that the fins are designed to be of two-portion structure in the staggered mode, air turbulence can be generated at the staggered positions of the fins, the air speed is reduced, the turbulent flow heat exchange strength is improved, heat exchange is enhanced, and finally a whole heat exchange component can have the better heat exchange effect on the premise that metal consumption and the heat exchange area are not increased; the air speed is reduced, so that the heat exchange time is prolonged, and efficiency of heat exchange between air and media is improved

Experimental and Simulation Studies on Thermoelectric Cooler: A Performance Study Approach

Abstract: The current experimental and simulation studies focus on two distinctive approaches on developing performance specifications on a typical thermoelectric cooler. The performance specifications considered for the current study involves cooling capacity, voltage, and current for different temperature ranges on hot side of the module. Simulation studies were carried out using COMSOL Multiphysics software for analyzing the coefficient of performance (COP). Thermoelectric cooler’s performance was simulated for the module’s hot side temperature ranges of about 303.15–333.15 K with a stipulated temperature interval of around 5 K. COP is evaluated at various temperature ranges (20 K, 40 K, and 60 K) over the module for each temperature prevailing on the hot side. The whole system is numerically modeled and the final attained results were correlated with the results obtained from simulation. Factors considered for modeling includes Seebeck coefficient, thermal conductivity, and resistivity variation of the Peltier elements.

An innovated method to monitor the health condition of the thermoelectric cooling system using nanocomposite‐based CNTs

Abstract: Many crucial applications use the thermoelectric coolers (TECs) system because they have some desirable properties, including durability, reliability, simple structure, and quietness. However, the performance of TECs is sensitive to any form of change and needs to be monitored constantly to ensure that they are working at their optimal. This paper proposes a novel approach for condition monitoring. This novel approach, unlike other attempts, does not need additional sensors but is directly carried out through the exploitation of the multi‐wall carbon nanotubes (MWCNTs) piezoresistive property. For the suggested approach, a polyurethane (PU) resin was altered using various MWCNTs concentrations with the aim of constructing self‐sensing nanocomposites sensors whose electrical conductivity is high. To investigate the electrical properties and microstructure of the constructed sensor, electrical resistance measurement, and scanning electron microscopy were used. From the results, it can be concluded that as the thickness increased, conductivity exhibited a monotonic increase. The peak electrical conductivity was 2.55 S.cm−1 for the 3.1 mm‐thick MWCNTs sensors. This is approximately 5.1 above that of the 0.6 mm‐thick MWCNTs sensors. Added to this, the MWCNT/PU sensors exhibited a high‐temperature sensitivity with a negative temperature coefficient of resistance. The normalised resistance obtained from the sensor with the uppermost MWCNTs concentration is lower in comparison to the sensors with lower concentrations of MWCNTs. Additionally, the TEC cooling temperature influence on the tunnelling distance between MWCNTs was analytically estimated. This study's numerical results indicate that there is a potential correlation between TEC cooling generated temperature and the variations noted in the tunnelling distance between MWCNTs with an explicit impact on the general nanocomposite sensors changes in electric resistance when the TEC system is in service.

Performance study of thermoelectric cooler using multiphysics simulation and numerical modelling

Abstract: This paper focuses on two different methods of obtaining performance parameters of a thermoelectric cooler. Based on the simulation results using COMSOL Multiphysics the performance parameters, suc...