04/02166 Thermal modelling and experimental validation of ground temperature distribution in greenhouse

The initial ground temperature (IGT) is one of the most important parameters in designing a ground source heat pump (GSHP) system and evaluating its performance. In this paper, three initial ground temperature test methods are introduced. Except the shallow zone, the ground temperature distribution measured from direct and indirect testing method has very small difference. In direct test, the temperature sensor must be embedded when burying the tube in the borehole which is hard to operate in engineering applications. Thus the direct testing method is suggested to be applied in the scientific research. The indirect testing method could be used in engineering applications. The mean ground temperature could be calculated from temperature distribution except the shallow zone temperature. The results from three calculating methods have a quite small difference. Therefore, the arithmetic average method is suggested for scientific and engineering application to calculate the mean ground temperature. The mean ground temperature is also gotten in TRT conveniently. In the condition of velocity 0.7m/s, water was circulated in the tube system with no heat source for 30 minutes. The average water temperature could be regard as the mean ground temperature with sufficient accuracy.

Download Full-text

A Thermal Modelling Approach and Experimental Validation for an Oil Spray-Cooled Hairpin Winding Machine

IEEE Transactions on Transportation Electrification ◽

10.1109/tte.2021.3067601 ◽

2021 ◽

pp. 1-1

Author(s):

Fengyu Zhang ◽

David Gerada ◽

Zeyuan Xu ◽

Chuan Liu ◽

He Zhang ◽

...

Keyword(s):

Experimental Validation ◽

Thermal Modelling ◽

Winding Machine ◽

Modelling Approach

Download Full-text

Converting a food oven into a thermal sanitizer for Personal Protective Equipment against COVID-19: Computational Fluid Dynamics simulation

10.46354/i3m.2021.foodops.001 ◽

2021 ◽

Author(s):

Eleonora Bottani ◽

Roberto Montanari ◽

Andrea Volpi ◽

Giulio Di Maria ◽

Federico Solari ◽

...

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Temperature Distribution ◽

Personal Protective Equipment ◽

Experimental Validation ◽

Dynamics Simulation ◽

Protective Equipment ◽

Computational Fluid Dynamics Simulation ◽

Food Sector ◽

Know How

COVID-19 brought several management problems, and among these surely the topic of Personal Protective Equipment (PPE) turned out to be crucial. Indeed, in the light of mandatory measurements adopted by governments both for private individuals and companies, their demand has rapidly increased, thus generating shortages, increased waste and unbalanced prices. In response to that, many industrial fields offered their tools and know-how for trying to partly face this issue, and in this paper part of a solution of this kind is presented. Specifically, it is meant the redesign of a food oven produced by an Italian company operating in the food sector (Nilma S.p.A.) for thermal sanitization against the virus in question. In this paper, the simulation of the temperature distribution inside the chamber is simulated, with subsequent experimental validation at 95°C.

Download Full-text