Abstract
In the present investigation, the heat transfer coefficient inside a horizontal pipe is analytically studied in order to know its behavior during the transition from the liquid phase to the vapor phase of refrigerant R600a. A hydrocarbon type refrigerant is used due to its characteristics, a low Ozone Destruction Potential (ODP) and low Global Warming Potential (GWP). Currently, natural refrigerants have managed to gain space within the industries and have been used in different investigations, in order to create awareness about the reduction of the use of substances that affect environmental conditions. Several countries worldwide meet the objectives set out in the Kyoto and Montreal protocols, with the intention of reducing the use of substances that affect the ozone layer and caring for the environment. The experimental tests were carried out using a collector/evaporator, a component of a solar-assisted direct expansion heat pump (DX-SAHP), which is used in applications such as heating systems, air conditioning, heating of water, among others. DX-SAHP systems have become a favorable alternative to replace conventional water heaters due to their low energy consumption, since they use incident solar radiation as an energy source, thus reducing the use of fossil fuels and emissions of carbon dioxide (CO2) into the atmosphere. In addition, it merges the collector and the evaporator into a single unit, reducing space, costs and increasing the energy efficiency of the system. The mathematical model selected for the analysis of the heat transfer coefficient was that of Kanizawa, during the analysis the effect STUDY OF THE HEAT TRANSFER COEFFICIENT IN A HORIZONTAL PIPE USING A HYDROCARBON TYPE REFRIGERANT2 of incident solar radiation, wind speed, ambient temperature. In addition, different parameters were used, such as: mass velocity, steam quality, heat flux and saturation temperatures. The results obtained show a heat transfer coefficient that fluctuates between 2 and 10 kg·s-1·m-2, considering a heat flow between 391.44 and 488.27 W·m-2 and a steam quality between 0.2 and 0.99.
| Translated title of the contribution | Study of the Heat Transfer Coefficient in a Horizontal Pipe Using a Hydrocarbon Type Refrigerant |
|---|---|
| Original language | Spanish (Ecuador) |
| State | Published - 16 Sep 2021 |
| Event | Encuentro Internacional de Educación en Ingeniería ACOFI (EIEI ACOFI 2021) - CO Duration: 21 Sep 2021 → 24 Sep 2021 https://www.acofi.edu.co/eiei2021/ |
Conference
| Conference | Encuentro Internacional de Educación en Ingeniería ACOFI (EIEI ACOFI 2021) |
|---|---|
| Period | 21/09/21 → 24/09/21 |
| Internet address |
Keywords
- Heat transfer coefficient
- Refrigerant
- Solar energy
CACES Knowledge Areas
- 517A Mechanics and allied metalworking occupations
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