Evacuated Tube Research Articles

Thermal Modeling of Water-in-Tube Type Evacuated Tube Solar Collectors to Predict Outlet Water Temperature: An Experimental Validation

Abstract Thermal model is developed to predict the outlet water temperature with respect to time for water-in-tube type evacuated solar collector connected in series. Developed mathematical expression is validated for the single collector and two collectors connected in series. In each collector, there are 20 evacuated tubes connected to the storage tank. Coefficient of determination (R2), reduced chi-square (χ2), and root mean squared error (RMSE) have been calculated to show the prediction accuracy of the developed model. For single and two collectors connected in series, R2 is 99.73% and 99.90%, χ2 is 0.46 °C and 0.39 °C, and RMSE is 0.70 °C and 0.65 °C, respectively. Predicted value shows good agreement with the experimental value. At a constant mass flowrate, the maximum outlet temperature reaches 53.10 °C and 71.50 °C for single and two collectors in series, respectively. The maximum energy for the single collector is 4.12 kW and 4 kW, while for two collectors connected in series, the maximum energy is 7.08 kW and 6.69 kW. Average thermal efficiency is 4.45% and 4.51% and average exergy efficiency is 9.66% and 15.17% for single and series-connected collectors, respectively. Developed model can design energy-efficient “water-in-tube type evacuated tube collector” for domestic and industrial applications.

Mapping the development of various solar thermal technologies with hype cycle analysis

This paper focuses on the technological development of solar thermal technologies through the analysis of patent records and search traffic. First, various solar thermal technologies are reviewed and discussed. Then, the related published patents are analysed. To improve the accuracy of patents retrieval, a new framework is proposed and employed based on the combination of keywords and keycodes. In this new framework, the proposed methodology can enhance the retrieved patent pool resolution by eliminating the patent with the relevant title but irrelevant technology scopes. Furthermore, new technological features such as technology attractiveness and acceleration are introduced and applied to solar thermal technologies. These two introduced features help to recognize interested areas by industrial players in the technological field. The pace of technology being developed and becoming matured could be identified by how fast the industry invests in technology by protecting its intellectual properties. The logistic S-curve is employed for assessing the current state of solar technologies on the technology life cycle. The market diffusion of each solar thermal technology is assessed by developing adoption curves using search traffic. Finally, the hype cycle of solar thermal technologies is demonstrated by combining the two technological assessment graphs. Through the proposed methodology, 8740 related patents are retrieved and screened. The analysis shows that Photovoltaic-thermal has the highest share in published patents and the parabolic trough and evacuated tube collectors are in their maturity phase. The parabolic dish collector is identified as one of the highest accelerated technologies and also located near the maturity phase. Therefore, it can be predicted that the next technology reaching the maturity phase would be the parabolic dish collector. Overall, all solar-heat driver cycles are in their growth stage, but the Rankine cycle is more developed. Text analysis determines the main challenge with cycles is the operation and maintenance that should be overcome to meet the maturity phase.

Modeling of evacuated tube solar collector involving longitudinal fins and nanofluids

In this research, the thermal characteristic of a thermosyphon evacuated tube collector for domestic application was examined, and the structure of the collector was modified by employing longitudinal fins within the absorber to raise the thermal efficiency. The efficacy of water-based Cu and MWCNT nanofluids in different volume fractions on the collector’s performance was investigated using computational fluid dynamics. Moreover, the alteration in the fluid flow structure and average tank temperature for various solar radiation incidence angles on the absorber surface was also discussed. A comparison has been made for distributions of velocity and temperature of the modified model and the conventional type along the different cross-sections of the absorber during the one-hour time period. Regarding the solar radiation incidence angle, the fluid flow pattern undergoes an alteration while the incidence angle changes to 30° and 60° in relative to the y-axis. However, tank mean temperature possesses the highest value, and the heat transfer improves when solar radiation is normal to the absorber surface. Moreover, the thermal analysis demonstrated the increment of the system’s thermal efficiency up to 65.21 % when longitudinal fins were employed along the evacuated tube. The comparison of simulated cases using nanofluids in different volume fractions revealed that applying 5 % MWCNT nanofluid for the finned case shows the greatest heat transfer improvement with the useful heat gain of 116.11 kJ and the optical efficiency of 67.61 % compared to unfinned, and finned cases using Cu nanofluids.

Performance enhancement of a dual heat pipe array based evacuated tube solar water heater for north eastern India climatic condition: A numerical approach

Heat pipes have been employed widely in solar collectors for more efficient heat transfer process. In recent times, heat pipes have been modified and micro heat pipe array has been developed with higher heat transfer characteristics. Current investigation adopted the new innovations to develop a micro heat pipe array based evacuated tube solar water heater. Outputs of solar collectors are dependent on fluctuating solar radiation, which needs to be accounted for in the analysis. To simulate the practical condition, a transient numerical study was carried out to assess the performance of such a collector with special reference to the location of Silchar, North-East India and hence actual solar radiation data for different months is considered for the analysis accounting the seasonal variation over the year. Results indicate that the efficiency is low in the morning session but eventually stabilized around 70–80% for the most part of the day. The output water temperature of the solar collector follows the same trend of the solar radiation curve where February month yields the highest output temperature and June month registering the lowest with approximately 5 K temperature difference between them at their respective peak points. There is unutilized heat trapped inside the evacuated tube collector, which the micro heat pipe array is unable to extract. One novel geometrical modification is adopted in the present study by incorporating two micro heat pipe arrays inside the evacuated tube collector, and the simulated results show that double micro heat pipe arrays could effectively penetrate the high temperature region to extract energy. The addition of one additional micro heat pipe array could result in 15–20% efficiency enhancement.

Performance analysis of solar water heater system with heat pipe evacuated tube collector on Moha soft drink industries in Ethiopia

Hot water is a crucial demand for many of Ethiopia's industrial and household heating systems. Most industries are using boilers powered by conventional energy sources to meet the demand for hot water. Due to the environmental impact of conventional energy sources usage and the rise in fossil fuel prices, the utilization of solar energy as a source of energy become a promising candidate for various applications. We use MATLAB/SIMULINK software to carry out this study of solar water heating systems with heat pipe evacuated tube collectors. Comparisons of total solar radiations were made at various optimum tilt angles for the selected locations. The adjustment of tilt angles has a great impact on the collection of useful energy. The maximum average annual energy savings are 1.21E+06 kWh/year for Addis Ababa at monthly and seasonal optimum tilt angles, 1.26E+06 kWh/year for Dire Dewa at a monthly optimum tilt angle, and 1.21E+06 kWh/year for Hawassa at a monthly optimum tilt angle. This means it will reduce 326,700 kg of CO 2 , 340,200 kg of CO 2, and 326,700 kg of CO 2 emissions per year respectively. The efficiency increases as the heat transfer fluid flow rate increases. The maximum annual cost savings are at monthly optimum tilt angles of the collector (6.12E+04 $/year, 6.36E+04 $/year, and 6.11E+04 $/year for Addis Ababa, Dire Dewa, and Hawassa cities, respectively with a payback period of 6.43 years, 6.18 years and 6.44 for Addis Ababa, Dire Dewa and Hawassa cities, respectively.

The compressive study of energy security prospects in India through Solar Power

Abstract Energy security depends upon the supply and demand of electricity. Power supply volatility is a challenge in India power sector. India is mainly dependent on coal, which is not a viable long-term option. Hence the future of energy supply in India is renewable energy, and solar energy is the most prominent and reliable source of renewable energy. The solar power plant is classified as a low, medium, and high temperature based solar power plant. The low- temperature solar power plant, the collectors, are unglazed plates. In contract, medium-temperature collectors are flat plates, and high-temperature collectors concentrate sunlight using mirrors and lenses, achieving temperature and pressure up to 3000 °C and 20 bar. This article discusses the existing total energy scenario, current solar energy developments, supportive solar energy policies, and solar energy prospects. The tactics, availability, perspectives, potential, and successes of solar energy in India are discussed in this study. The authors compared the barriers to solar energy acceptance and examined the topic of social dissimilarity from a broad theoretical perspective. The study offers policymakers at the federal and state levels, as well as investors, a perspective on issues that may lead to investments in this area. The study states that solar energy could meet above 50% of electricity sector demand in India in 2040. This study determined that solar energy incidence in India is around 5000 trillion KWh (kilowatt-hours) each year. The solar energy accessible in a single year surpasses the energy output from the petroleum derivative. The average energy from the solar power plant is 0.30 kWh per m2 equal to the 1400–1800 peak rated capacity. India has many solar power facilities, making it one of the top producers of renewable energy power.

Performance improvement and advancement studies of mixed-mode solar thermal dryers: a review.

Solar thermal dryers are solar-operated gadgets utilized to dehumidify various products, especially food items and rubber sheets. This article provides detailed design, parametric studies, and an in-depth review of mixed-mode solar dryers (MMSD) with a case study of fish drying near coastal lines. Due to several advantages compared to open sun drying and prominent performance index compared to indirect and direct type solar dryers, mixed-mode solar dryers have large adaptability on the field. Moreover, mixed-mode solar thermal dryers with different augmentations are reviewed, for instance, mixed-mode solar dryers with evacuated tube collectors, phase change materials, ultraviolet rays stabilized housing, and dehumidifiers. The case study of fish drying near the coastal line of Gujarat, India has been carried out to study the present scenario of the drying activities. Hence, the objective of this review is to identify the capable mixed-mode solar dryer with heat recovery systems. Substantial reviews within the article suggest an essential need to implement the hybrid mixed-mode solar dryer cum distiller technology for small-scale enterprises that can simultaneously provide potable water near coastal lines along with drying of fishes from the solar dryer. Furthermore, future research demands such hybrid mixed-mode solar drying systems that strongly fulfill the requirements of local communities near coastal lines involved in fish drying activities.

Parametric study of evacuated tube collector solar air heater with inserted baffles on thermal network for low-temperature applications

The great challenge in the evacuated tube solar air heater for the industrial application is choosing the optimum thermal networks to get target temperature for the desired air flow rate. In this work, theoretical analysis is done to investigate the influence of the significant design parameters such as evacuated tube length, diameter and number of tubes in a collector on the thermal performance and to design a thermal network model for achieving the desired temperature at specified flow rate of air for industrial process heat applications. Further, establishing an empirical correlation to simplify the thermal network design process. Based on the results of design parametric study, optimal parameters identified for a collector system are 20 numbers of evacuated tubes having dimensions of 1.8 m length, 58 and 47 mm outer and inner diameters. It is noticed that a considerable drop in temperature rise attained in each collector while increasing the number of collectors in series network. The enviro-economic analysis reveals that the overall useful energy gain per annum can be achieved around 8252 kWh which will reduce 17.16 tonne of carbon dioxide emission through the utilization of a thermal network comprising six modules working at 500 kg/h mass flow rate of air. The correlation relates the attainable effective thermal with the non-dimensional operating parameters such as mass flow number, temperature ratio, and number of collectors. The correlation can be used to design a solar evacuated tube thermal network and the proposed solar evacuated tube thermal network can be effectively employed for fulfilling the industrial process heating applications require hot air between 80 and 120 °C.

Recent advances on the evacuated tube solar collector scrutinizing latest innovations in thermal performance improvement involving economic and environmental analysis

Solar energy plays the most pivotal role in providing energy demand among all renewable energy resources in today's world. Hence, significant advances are being made to harness solar energy by using ever-evolving technologies such as solar collectors. Evacuated tube collectors have been in the center of attention due to high thermal efficiency and desirable performance in unfavorable weather conditions. This paper provides new insight into how ETSC has changed drastically to improve thermal performance. A full-scale comparison has been drawn between thermosyphon vacuum tube and flat plate units at the commencement to demonstrate the competency and uniqueness of evacuated tube collectors. At the next step, numerous numerical and experimental investigations have been compiled and presented to cover the latest innovations and developments in thermal modifications of evacuated tube collectors concerning the use of PCM, working fluids, and design parameters. Furthermore, to evaluate the thermal efficiency of collectors, mathematical modeling is also presented based on single-tube and the whole collector. Evacuated tube collectors have various residential and industrial applications for water heating, solar drying, solar desalination, and air conditioning which have been discussed extensively. In addition, challenges and obstacles in utilizing evacuated tube collectors have been identified and need to be tackled to reach higher thermal performance. Last but not least, an economic-environmental analysis is presented, which consequently demonstrated that evacuated tube collectors are cost-effective and impose less danger to the environment than flat plate collectors.

Techno-economic and GHG mitigation analyses based on regional and seasonal variations of non-concentrating solar thermal collectors in textile sector of Pakistan

SDG implementation in the industrial sector of Pakistan is significant for its economic growth, sustainable industrialization, innovation, and sustainable production. Integration of solar thermal collectors in the textile industry will encompass sustainable development goals (SDG 7,9,12,13). Meeting these goals in the thermal sector of Pakistan is becoming increasingly challenging due to the limited resources and harmful emissions from conventional fuels. In this study, the technical feasibility of two non-concentrating collectors, Flat Plate Collector (FPC) and Evacuated Tube Collector (ETC) was investigated for the application of preheating of feedwater of boilers. Choosing the better performing collector for a range of regional and climatic variations across Pakistan, a comparative analysis of three fuels (coal, oil, and natural gas) has been carried out by using TRNSYS and RETScreen for economic analysis and GHG emission mitigation, respectively. The overall best results have been observed in Quetta. For this city replacement of coal has shown the highest GHG emission mitigation potential of 182,326 tonnes of CO2 and the highest NPV for oil (1509.4 million PKR) among the three fuels studied. Based on the results, it can be deduced that this work can be further extended to concentrating thermal technologies as well. Since real-time industrial data has been used, the insights will promote solar thermal technology in Pakistan.

Comparative thermal analyses of solar milk pasteurizers integrated with solar concentrator and evacuated tube collector

Solar-based milk pasteurization enables decentralized maintenance of milk in remote areas of developing countries like Pakistan. Two innovative and efficient medium temperature range solar techniques; solar concentrator (SC) and evacuated tube collectors (ETC) were employed and compared based on theoretical and experimental analyses for an expedient and effective milk pasteurization. The detailed thermal analyses of both techniques were conducted to investigate the useful energy and losses during pasteurization. The available energy was estimated to be 8.11 and 5.63 kWh at the aperture areas of SC, ETC, respectively. Theoretically, it was also evident that SC, ETC require 4.68 and 4.22 kWh, respectively for a temperature difference of 35–40 °C during pasteurization for the designed milk batch size. However, under practical conditions, heat energy consumed for the milk pasteurization system coupled with SC, ETC was recoded to be 3.56 kWh and 3.91 kWh respectively; this value lies from 3.78–4.32 kWh to pasteurize 100-liters of milk for a temperature difference of 35–40 °C. The predicted value of efficiency for SC, ETC was found to be 57.71 and 74.88% respectively. The efficiency values under field conditions for SC, ETC were found to be 54 and 71.41% respectively. Generally, both systems performed exceptionally however, ETC outperforms SC theoretically and practically attributing to significantly reduced optical and thermal losses. This study concluded that ETC is efficient, simpler in design, stable, compact and cost-effective which provides an excellent opportunity for decentralized milk pasteurization.

A Numerical Investigation Into the Flow Development and Heat Transfer Characteristics for Different Tube Geometry Configurations in a Water in Glass Evacuated Tube Solar Water Heater

Abstract This study aims to numerically assess the heat transfer performance of water-in-glass evacuated tube solar water heater (WGET-SWH) for various parameters. It is observed that the natural circulation flowrate, velocity, and temperature distribution are strongly dependent on WGET-SWH geometry and operating conditions. The natural circulation flowrate is found to be increasing with tube length, diameter, inclination angle, and circumferential heat input. However, the heat transfer rate decreases with an increase in aspect ratio. The average Nusselt number increases with an increase in inclination angle till 45 deg and then decreases. Also, the study shows that thermal stratification in reservoir fluid is greatly influenced by circulation flowrate, flow momentum, collector outlet temperature, thermal acceleration, and buoyancy effect.

Energetic and Exergetic Analysis of a Solar-Driven Single-Effect Absorption Refrigeration System Using LiBr + LiCl/H2O Solution Mixture

Abstract Comprising an eco-friendly blueprint, absorption refrigeration systems have attracted a lot of interest as they can use biomass, solar and geothermal energy sources which can mitigate climate change. The current study presents a methodology based on energy and analysis for solar-driven single-effect absorption refrigeration systems, which offer a 50-kW cooling capacity. This study proposes a new mixture ratio of LiBr + LiCl (mass ratio of 2:1)/H2O solution and compared it to LiBr/H2O thermodynamically. Based on the climate data of Kocaeli province in Turkey, an evacuated tube collector is employed to benefit from solar energy to meet the generator heat load of the system. Although at an evaporator temperature of 5 °C, enhanced thermodynamic performance is evident with the use of the LiBr + LiCl/H2O system, and a diminished solar collector area is required compared to the system utilizing LiBr/H2O; there is a level of attrition relating to the impact of the former with a single degree rise in evaporator temperature. However, this remained at a greater value than for the latter system. The final results pointed out that LiBr + LiCl/H2O has a 48.93% lower circulation ratio, 8.81% higher coefficient of performance (COP) of chiller, 8.88% higher solar COP, 8.96% higher exergy efficiency of chiller, 8.90% higher exergy efficiency of solar-driven system, 8.92% lower solar collector area, and 8.91% lower storage tank volume than LiBr/H2O system in the investigated operating temperature ranges. The final results of the present study can be safely tested in the experimental design of single-effect absorption chillers.

A Comparative Thermal Performance Assessment of Various Solar Collectors for Domestic Water Heating

Growing population, depleting fossil fuels, economic expansions, and energy intensive life style demand are resulting in higher energy prices. We use energy as of heat and electricity, which can directly be obtained from sun using thermal collectors and solar cells. Solar thermal systems are gaining attention for water and space heating applications due to green aspects of solar energy. A solar thermal collector is a vital part of solar thermal energy system to absorb radiant energy from the sun. In this study, a solar water heating (SWH) system has been designed and simulated in the TRNSYS ® software using thermal and chemical properties of heat transfer fluids using REFPROP for dwellings located on ±31° latitudes (+31 Lahore in Pakistan and -31° Perth in Australia). We present an efficiency parametric optimization-based model for water and space heating. Simulation results for four types of solar thermal collectors are presented, and performance is analyzed on the basis of output temperature ( T out ), solar fraction ( f ), and collector efficiency ( η ). This study evaluates the comparative performance of evacuated tube collector (ETC), flat-plate collector (FPC), compound parabolic concentrator (CPC), and thermosiphon-driven systems. Our findings conclude the evacuated glass tube collector achieves the highest solar fraction, i.e., 50% of demand coverage during August in Pakistan and February in Australia, with an overall average of 43% annually.

Pilot-Scale Evaluation of Concentrating Solar Thermal Technology for Essential Oil Extraction and Comparison with Conventional Heating Sources for Use in Agro-Based Industrial Applications.

The conventional steam-distillation method requires a high amount of saturated steam and as a result, a lot of energy. Besides being energy-intensive, conventional steam-distillation processes emit carbon dioxide into the atmosphere. The energy demand in essential oils processing and related agro-based processes can be alleviated by using concentrating solar thermal (CST) technologies. Most of the solar plants installed in South Africa use flat plate collectors and evacuated tube collector systems with temperatures below 100 °C, which is ideal for only a low-temperature process application. This paper investigates the use of a low-cost CST technology, the parabolic trough collector (PTC), for steam-distillation in an extraction process. The PTC-powered system was built and tested for extracting essential oil from citrus peels. For comparison, the extraction process was carried out on a laboratory scale, a pilot gas-powered system, and PTC. Essential oil yields for orange, lemon, and mandarin were 0.65, 0.44, and 1.17%, respectively, using gas-powered steam-distillation. The yields for PTC were 0.67, 0.53, and 1.09%, which were all within the expected ranges. Gas chromatography results for the PTC experiment showed the presence of key components such as limonene (90%) in the essential oils. The PTC achieved a significant overall system efficiency of 54.99%, even though some parts of the device were not thermally insulated. The results showed that PTC can compete with gas-powered systems. Furthermore, the essential oil yields were comparable to those obtained in laboratory experiments. All of this demonstrates that PTC is suitable for use in agro-based industrial applications.

Flat plate and evacuated tube collectors solar water heater system – A comparative study

Renewable energy for the sustainable energy application in the buildings are increasing day-by-day. The aim of this study is to compare flat plate and evacuated tube collectors system in solar water heating of urban building. The two types of solar water heater systems were designed and evaluated based on the requirements of the urban building dwellers. The F-chart method along with commercial software was used to study the performance efficiency of the solar water heater system at an operating temperature of 65 °C. An economic analysis was also carried out using the same tool for both types of collectors with the desired designed parameters. The performance efficiency results of flat plate and evacuated tube collector are 77 % and 67.3 %, respectively. The economic analysis showed that flat plate collector is cost-effective for the solar water heater system due to its steadiness and lower maintenance costs.

Energy and Exergy Based Thermal Analysis of a Solar Assisted Yogurt Processing Unit

Energy and exergy based thermal analysis was conducted for a solar assisted yogurt processing unit capable of performing required heating and cooling processes in a single container. The system consisted of a round-shaped fermentation chamber connected with a hot water storage tank coupled with an evacuated tube collector and a pillow plate at the bottom of the chamber for cooling through a PV-operated refrigeration unit. Experiments were conducted using three different volumes of cow’s raw milk (30, 40, and 50 L). Energy analysis showed that 40% of the total energy was consumed during the heating process of raw milk in all cases, with an overall heat transfer efficiency of more than 80%. The specific product energy was calculated to be lower (485 kJ/kg) for the higher volume of milk (50 L). The exergy losses in the compressor of the refrigeration unit were calculated almost constant (1.0037 kW), while the exergy recovered during the refrigeration process was found in the range of 0.48–4.54 kJ/kg, 1.35–3.96 kJ/kg, and 0.84–6.18 kJ/kg for 50, 40, and 30 L of batches, respectively. Out of the total available power (2218 W) at the evacuated tube collector, 69.70% of energy was available for milk heating. The study is useful for designing optimization based on the distribution of energy and losses at various system components.

Technical, environmental and ranking analysis of using solar heating: A case study in South Africa

The process of heating water consumes a lot of energy. In South Africa (SA) up to 40% of household energy consumption is utilized for water heating. In this regard, the use of renewable energies, especially solar, can help reduce the energy crisis in this country. In this study, applying the solar water heaters (SWHs) in home-scale has been explored for the first time, by using climatic information for 21 cities in South Africa. The techno-environmental assessment was performed by TSOL PRO 5.5 on two types of the evacuated tube (ET) and flat plate (FP water heaters). Furthermore, these cities are ranked using GAMS 24.1 and two types of DEA methods. The results indicate the efficiency of evacuated tube SWHs is better than that of flat plate SWHs at all cities and if we use the FP water heater, the average solar fraction is 95.93%, which prevents about 23.5 tons of CO2 emissions annually. These values for ET water heaters are 99.16% and 24.4 tons per year, respectively. For the FP collector, the findings indicate Beaufort West, Mmabatho and Welkom cities are preferable cities in both models, DEA-CCR and DEA-Additive models.

A novel intelligent strategy-based thermodynamic modeling and analysis of solar-assisted vapor absorption refrigeration system.

In recent times, solar energy has been utilized for refrigeration systems due to its efficiency and clean form of energy. Moreover, the evacuated tube collector (ETC)-assisted vapor absorption refrigeration system plays a significant role in the modern industrial world compared to the traditional electrical system. However, the conventional vapor absorption refrigeration system design is complex in nature and causes corrosion in the system. Therefore, in this research, novel Generalized Approximate Reasoning-Based Intelligent Control (GARIC) and Hybrid Ant Colony African Buffalo Optimization (HACABO) methods based on an ETC-linked 5-kW vapor absorption refrigeration system are proposed depending on lithium bromide-water (LiBr-H2O). Primarily, the Haryana region's solar radiation and weather parameters were taken over a year to simulate the ETC system. ETC collects the solar energy for the refrigeration cycle, and the efficiency of the ETC is estimated using the GARIC method as per the input of solar radiation, collector area, and used solar energy. Moreover, the efficiency of the ETC is optimized using the proposed HACABO method. The modified polynomial fits curved equation is utilized for performance analysis. The simulation model of the solar cooling absorption system is carried out in the MATLAB platform. The coefficient of performance (COP) rate of the absorption cycle has gained 0.82% with the help of HACABO. Compared to other recent associated models, the proposed model has maximized the COP in the finest range.

Experimental evaluation of a solar-driven adsorption desalination system using solid adsorbent of silica gel and hydrogel.

Nowadays, the world is facing a shortage of fresh water. Utilizing adsorbent materials to adsorb air moisture is a suitable method for producing freshwater, especially combining the adsorption desalination system with solar energy devices such as solar collectors. The low temperature of solar collectors has caused some water to remain in the adsorbents in the desorption process and has reduced the possibility of using these systems. In this research, for the first time, an evacuated tube collector (ETC) is used as an adsorbent bed so that the temperature of the desorption process reaches higher values and as a result, more fresh water is expected to produced. In this study, two adsorption desalination systems (ADS) are experimentally investigated. In the first system, a laboratory experimental setup using silica gel and hydrogel adsorbents is used to investigate freshwater production using each of the two adsorbents. The effect of different parameters such as variable adsorption and desorption time, variable temperature and humidity of inlet air, and variable adsorbent mesh sizes on the desalination process is evaluated. Then, in the second system, an innovative configuration of the solar-driven adsorption desalination system with an ETC full of silica gel is studied. In the laboratory experimental setup, the maximum amount of water produced by silica gel is 0.36 L/kg and by hydrogel is 0.58 L/kg. In the solar-driven adsorption desalination system, the largest amount of accumulated water production, daily efficiency, and cost per liter (CPL) of produced water are 1.518kg/m2 day, 11.25%, and 0.0699 $/L, respectively. Therefore, this new configuration for an adsorption desalination system seems feasible.