Experimental investigation of the effect of using water and ethanol as working fluid on the performance of pyramid-shaped solar still integrated with heat pipe solar collector

Solar Energy ◽  
2020 ◽  
Vol 207 ◽  
pp. 10-21 ◽  
Author(s):  
Rasoul Fallahzadeh ◽  
Latif Aref ◽  
Nabiollah Gholamiarjenaki ◽  
Zeinab Nonejad ◽  
Mohammadreza Saghi
Keyword(s):  
Experimental Investigation ◽  
Heat Pipe ◽  
Solar Collector ◽  
Working Fluid ◽  
Solar Still

An Experimental Investigation of Heat Pipe Flat-Plate Solar Collector with Water-Ethanol Mixture as a Working Fluid

2014 ◽  
Vol 592-594 ◽  
pp. 1413-1417
Author(s):  
Pravin R. Harde ◽  
Ashok T. Pise ◽  
Balasao D. Kusure
Keyword(s):  
Experimental Investigation ◽  
Heat Pipe ◽  
Flow Rate ◽  
Solar Collector ◽  
Filling Ratio ◽  
Maximum Efficiency ◽  
Working Fluid ◽  
Condenser Section ◽  
Ethanol Mixture ◽  
Flat Plate Solar Collector

The objective of the present study is to investigate the performance of solar collector with serpentine shape of heat pipe and water-ethanol as a working fluid. Serpentine shape is easy of manufacturing and also to reduce cost of manufacturing. In this work, heat pipe is made from copper tube having ID 10mm and OD 12mm.The tube is bent in serpentine manner and filled with Water-ethanol as a working fluid with 70% filling ratio. The length of evaporator, adiabatic and condenser section was 480mm, 50mm and 65mm respectively. The test is conducted for coolant flow rate 4.5 kg/hr different angle of collector 20°, 31.5°, 40°, 50°, 60°. Result shows that water-ethanol collector gives better performance than collector with water as a working fluid. Maximum efficiency is observed at 31.5° inclination.

Theoretical and experimental investigation of plate screen mesh heat pipe solar collector

2014 ◽  
Vol 87 ◽  
pp. 428-438 ◽  
Author(s):  
Taoufik Brahim ◽  
Mohammed Houcine Dhaou ◽  
Abdelmajid Jemni
Keyword(s):  
Experimental Investigation ◽  
Heat Pipe ◽  
Solar Collector ◽  
Screen Mesh

Study on Heat Transfer Characteristics of Loop Heat Pipe for Solar Collector

2012 ◽  
Author(s):  
Shota Sato ◽  
Shigeki Hirasawa ◽  
Tsuyoshi Kawanami ◽  
Katsuaki Shirai
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Heat Transfer Rate ◽  
Solar Collector ◽  
Transfer Rate ◽  
Thermal Conductance ◽  
Filling Ratio ◽  
Working Fluid ◽  
Loop Heat Pipe ◽  
Single Tube

We experimentally study the thermal conductance of single-tube and loop heat pipes for a solar collector. The evaporator of the heat pipe is 1 m long, 6 mm in diameter and has 30° inclination. The thermal conductance is defined as the heat transfer rate divided by the temperature difference between the evaporator-wall and the condenser-wall. Effects of heat transfer rate, saturation temperature of the working fluid, liquid filling ratio, inclination angle, and position of the evaporator on the thermal conductance are examined. We found that the thermal conductance of the 30°-inclined loop heat pipe with an upper-evaporator is 40–50 (W/K), which is 1.8 times higher than that of the vertical loop type and 3 times higher than that of the single-tube type. Thus, the inclined loop heat pipe is preferable for a solar collector. There is an optimum liquid filling ratio. When the liquid filling ratio is too small, a dry-out portion appears in the evaporator. When the liquid filling ratio is too large, the liquid flows in the condenser to decrease heat transfer area. Also we numerically analyze the thermal conductance of a vertical loop heat pipe.

An Experimental Investigation of Three-Dimensional Flat-Plate Oscillating Heat Pipe

2009 ◽  
Author(s):  
Scott M. Thompson ◽  
Hongbin Ma ◽  
Robert A. Winholtz ◽  
Corey Wilson
Keyword(s):  
Experimental Investigation ◽  
Flat Plate ◽  
Heat Pipe ◽  
Three Dimensional ◽  
Neutron Imaging ◽  
Heat Fluxes ◽  
Working Fluid ◽  
Oscillating Heat Pipe ◽  
Oscillatory Pattern ◽  
Thermal Oscillations

An experimental investigation on the effects of condenser temperatures, heating modes and heat inputs on a miniature, three dimensional flat-plate oscillating heat pipe (3D FP-OHP) was conducted visually and thermally. The 3D FP-OHP was charged with acetone at a filling ratio of 0.80, had dimensions of 101.60 × 63.50 × 2.54 mm3, possessed 30 total turns, and had square channels on both sides of the device with a hydraulic diameter of 0.762 mm. Unlike traditional flat-plate designs, this new three-dimensional, compact design allows for multiple heating arrangements and higher heat fluxes. Transient and steady-state temperature measurements were collected at various heat inputs and the activation/start-up was clearly observed for both bottom and side heating modes during reception of its excitation power for this miniature 3D FP-OHP. The neutron imaging technology was simultaneously employed to observe the internal working fluid flow for all tests directly through the heat pipe’s copper wall. The activation was accompanied with a pronounced temperature field relaxation and the onset of chaotic thermal oscillations — all occurring with the same general oscillatory pattern at locations all around the 3D FP-OHP. Qualitative and quantitative analysis of these thermal oscillations, along with the presentation of the average temperature difference and thermal resistance, for all experimental conditions are provided. The novelty of the three-dimensional OHP design is its ability to still produce the oscillating motions of liquid plugs and vapor bubbles and, more importantly, its ability to remove higher heat fluxes.

Experimental investigation on the thermal performance of heat pipe solar collector (HPSC)

2020 ◽  
Vol 26 ◽  
pp. 3569-3575 ◽  
Author(s):  
N. Jayanthi ◽  
R. Suresh Kumar ◽  
Gopalu Karunakaran ◽  
M. Venkatesh
Keyword(s):  
Experimental Investigation ◽  
Heat Pipe ◽  
Thermal Performance ◽  
Solar Collector
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