Performance of wickless heat pipe flat plate solar collectors having different pipes cross sections geometries and filling ratios

Hussein, H.M.S.; El-Ghetany, H.H.; Nada, S.A.

doi:10.1016/j.enconman.2005.08.009

Cited by 97 publications

(42 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental and theoretical results indicated that the number of wickless heat pipes has a significant effect on the collector efficiency. Furthermore, Hussein et al [1] investigated experimentally the effect of wickless heat pipe cross section geometry and its working fluid filling ratio on the performance of flat plate solar collectors. The experimental results indicate that the elliptical cross section wickless heat pipe flat plate solar collectors have better performance than the circular cross section ones at low water filling ratios.…”

Section: Introductionmentioning

confidence: 99%

“…A variety of flat plate solar collectors and evacuated tubular solar collectors have been produced and applied around the world. However, these conventional solar collectors suffer from some drawbacks, such as reversed cycle during cloudy periods of the day and the night, high heat capacity, limited quantity of heat transferred by the fluid, high pumping requirements, scale formation, freezing and corrosion [1]. Heat pipes offer a promising solution to these problems.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Theoretical investigation on thermal performance of heat pipe flat plate solar collector with cross flow heat exchanger

Xiao

Zhang

et al. 2012

Heat Mass Transfer

View full text Add to dashboard Cite

Based on the heat transfer characteristics of absorber plate and the heat transfer effectiveness-number of heat transfer unit method of heat exchanger, a new theoretical method of analyzing the thermal performance of heat pipe flat plate solar collector with cross flow heat exchanger has been put forward and validated by comparisons with the experimental and numerical results in pre-existing literature. The proposed theoretical method can be used to analyze and discuss the influence of relevant parameters on the thermal performance of heat pipe flat plate solar collector.List of symbols C p Specific heat capacity at constant pressure (J kg -1 K -1 ) DHeat pipe diameter (m) G Mass flow rate of heated fluid, (kg s -1 )

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical investigation on thermal performance of heat pipe flat plate solar collector with cross flow heat exchanger

Xiao

Zhang

et al. 2012

Heat Mass Transfer

View full text Add to dashboard Cite

show abstract

“…It behave like thermal diode. Fig 23. Shows the schematic diagram of the evacuation and charging rig of wickless heat pipe and Fig 24. Cross sectional views of the prototype wickless heat pipe flat plate solar collector [40]. …”

Section: Micro Tubes Flat Plate Collectormentioning

confidence: 99%

“…Similarly [39] shows that the increase in number of wickless heat pipe gives a significant effect on the collector efficiency. [40] examine the heat pipe for three different geometry that are circular, elliptical and semicircular. The result shows that the elliptical geometry gives better performance than the other does.…”

Section: Micro Tubes Flat Plate Collectormentioning

confidence: 99%

A Review on Revolution of Flat Plate Collector for Solar Water Heater

Patil¹

2018

IJRASET

View full text Add to dashboard Cite

Energy is the significant need of the world either for nutrition or for development of the society. The power bank of the earth is the sun, which has tremendous amount of energy in it and will never exhaust. The conversion of solar energy to thermal energy is the function of collector. Flat plate collector (FPC) are cost effective and more convenience in all collectors. The paper reveals the different design of the flat collectors used to enhance the efficiency of the collector. Effect of using phase change material, nanofluids, heat pipe, different geometry of the tubes and absorber discussed. This review deals with the suggestion for the research work in flat plate collector. Keywords: FPC Design; Solar Collectors; different collectors for SWH; Design of SWH I. INTRODUCTIONEnergy is the most important and a key factor in day-to-day life. The keen interest is towards the solar energy which is a pure green energy and available in plenty. The energy of Sun used to heat the water, which is the great need of each human being for various purposes. During review it is found that the various solar water heating system were made by many researchers with relatively high efficiency and reasonable cost, but the system does not meet the requirement of other countries due to climatic conditions and many other reasons. Today environment is the major issue and the awareness regarding the environment is increasing this promote solar and renewable energy system in world and decreases the dependencies' on fossil fuels. The solar water heating system consist of riser tubes, absorbers a dark surface plate, insulation and glazed glass. The system when exposed to the sun, the absorber absorbs the solar radiation and transfers a part of it to the fluid flowing over/under it [3][4][5][6][7]. The more is the collector area more will be the energy, but the law of thermodynamics state that no machine can gives 100% output therefore we even cannot get the 100% percent conversion. Now, the design goals were to have the collector that can convert the maximum solar energy to heat energy with a lesser amount of losses; and cost. The objective for the review of solar water heating system is to get the various designs available and invented by researchers at one place to get the idea of possible development in it with the future of design in Solar Water Heater (SWH). The review is limited to the flat plate collector and other similar to it. There are two broad categories of SWH (passive and active), each of them operating in either direct or indirect mode. The active systems give 35%-80% efficiency higher than those of the passive systems [3].

show abstract

“…The evacuated tube solar collectors are famous for their good optical characteristics (Ma et al, 2013) and insignificant heat losses (Badar et al, 2011). For the heat transfer in the evacuated tube solar collectors are mostly used closed heat pipes the effectiveness of which depends on the heat pipe structure (Sivaraman and Krishna 2 Mohan, 2005), the composition of the used agent (Hussein et al, 2006) and the flow-rate of the heat-transfer agent of the system (Sivakumar et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Energy Characteristics of Evacuated Tube Heat-Pipe Solar Collector System

Kavolynas

Drejeris

2015

Proceedings of the 7th International Scientific Conference Rural Development 2015

View full text Add to dashboard Cite

Evacuated tube heat-pipe solar collector system with closed heat pipe has been experimentally investigated. Experiments have been fulfilled using the solar imitator whose energy irradiance on the surface of the solar collector at the constant ambient conditions is 800 W/m². Energy characteristics of the solar collector system with different flow -rates of the heat-transfer agent have been investigated using various flow-rate speeds of the heat-transfer agent. It has been stated that the increase of the flowrate of the heat-transfer agent in the system from 0.01 to 0.12 kg/s would minimize the average collector efficiency from 0.81 to 0.55. When the reduced flow-rate of the heat-transfer agent has been used in the system, the higher temperature of the hot water is reached in the storage tank and at the same time the temperature of the heat -transfer agent in the system is increased. Thus, more energy has been lost in the pipeline and hot water storage tank, but less energy is used for the circulation of the heat -transfer agent energy. Increasing the agent flow-rate speed in the system has reduced the heat losses in the pipeline, but more energy is used for the energy circulation of the heat-transfer agent. Therefore, the medium efficiency of the solar collector system has changed insignificantly (0.47 ± 0.01).

show abstract

Performance of wickless heat pipe flat plate solar collectors having different pipes cross sections geometries and filling ratios

Cited by 97 publications

References 14 publications

Theoretical investigation on thermal performance of heat pipe flat plate solar collector with cross flow heat exchanger

Theoretical investigation on thermal performance of heat pipe flat plate solar collector with cross flow heat exchanger

A Review on Revolution of Flat Plate Collector for Solar Water Heater

Experimental Investigation of Energy Characteristics of Evacuated Tube Heat-Pipe Solar Collector System

Contact Info

Product

Resources

About