Improvement of Thermal Energy Storage by Integrating PCM Into Solar System (original) (raw)
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The fast growing problem of the depletion of the available non renewable energy resources has focused the world's attention on the need of proper use and harvesting of the renewable energy resources. One of the important renewable energy resources is solar energy. In recent times the use of PCM (phase change materials) for storage of thermal energy in solar water heaters has come forward as an efficient way for trapping and storing solar energy. This paper is a summary of the analysis made on how efficiently thermal energy can be stored using PCM in thermal energy storage systems of solar water heaters. The solar water heater is so constructed that it is a combination of two working systems, the first of the two absorbing systems is the solar water heater and the second is TES (thermal energy storage system). TES systems which have paraffin as the PCM are under study here. These systems trap and store the solar energy during daytime with the help of PCM (paraffin) which can later be used during night time to heat water. This heated water can then be used for domestic as well as industrial purposes. TES with PCM has been termed as an effective way to store thermal energy on the basis of the recent experimental studies highly due to their large heat trapping capacity and also because of their isothermal characteristics. These systems are examined properly to check their efficiency.
This study proposes a phase change material for use in radiant cooling panels integrated with thermoelectric modules (PCM-TERCP) and evaluates its performance characteristics during the solidification and melting process of phase change materials in design conditions. The PCM-TERCP consists of phase change materials (PCMs), thermoelectric modules (TEMs), and aluminum panels. TEMs operate to freeze the PCM, and PCM stores the cooling thermal energy to maintain the constant surface temperature of the panel for radiant cooling. The main purpose of thermal energy storage systems is the shift of the electricity consumption from daytime to night-time during the summer season. Therefore, PCM-TERCP can implement off-peak operation according to which energy is expected to be saved. The melting temperature of PCM and the target surface temperatures of the bottom panels of PCM-TERCP were designed to be 16°C. Additionally, the room temperature and mean radiant temperature (MRT) was set to 24°C, while the thickness of the PCM pouch was 10 mm. As a result, the solidification process required 4 h and the total input power was 0.528 kWh. Correspondingly, the melting process can operate passively over a period of 4 h. In most cases, the operating temperature was lower than 19°C, which validates the temperature response of PCM-TERCP.
IJERT-Investigation of Solar Water Heating System with Phase Change Materials
International Journal of Engineering Research and Technology (IJERT), 2018
https://www.ijert.org/investigation-of-solar-water-heating-system-with-phase-change-materials https://www.ijert.org/research/investigation-of-solar-water-heating-system-with-phase-change-materials-IJERTCONV6IS10012.pdf Thermal energy storage has always been one of the most critical components in residential solar water heating applications. Solar radiation is a time-dependent energy source with an intermittent character. The heating demands of a residential house are also time dependent. However, the energy source and the demands of a house (or building), in general, do not match each other, especially in solar water heating applications. The peak solar radiation occurs near noon, but the peak heating demand is in the late evening or early morning when solar radiation is not available. Thermal energy storage provides a reservoir of energy to adjust this mismatch and to meet the energy needs at all times. It is used as a bridge to cross the gap between the energy source, the sun, the application and the building. So, thermal energy storage is essential in the solar heating system. Therefore, in this paper, an attempt has been taken to summarize the investigation of the solar water heating system incorporating with Phase Change Materials (PCMs).
DESIGN AND DEVELOPMENT OF SOLAR WATER HEATING SYSTEM USING PHASE CHANGE MATERIAL
IRJET, 2023
Solar energy is readily available almost all year long and can be used to generate electricity and heat. Over time, interest of public and government in solar energy has skyrocketed. However, it has the drawback of not producing as intended during off-seasons. A useful method of storing thermal energy that offers the benefit of high energy storage density and isothermal storage is by the usage of a latent heat storage system with PCM. Energy is stored using PCM, which is then used to heat water for domestic usage at night. This makes sure that hot water is accessible all day long. This system consists of solar water heating setup along with a PCM based tube in shell heat exchanger is designed in this work which will be integrated with solar water heating system.
Experimental Analysis of Solar Water Heating System using Phase Change Material
International Journal For Reseacrh In Applied Science And Engineering Technology, 2020
Energy one of the basic need of human being for existence. It plays important role in development and progress. The main source of energy is fossil fuels but sources are depleting now days. So we are forced to move on to another renewable energy sources like sun, wind, tidal etc. India is also investing heavy amount of money into non-renewable energy sources. Considering about the solar energy it can be utilise in two ways either converting it into electrical energy using solar cell or use as a thermal energy. The second method is being use form ancient time for house hold purpose like drying food, cloths etc. in U.S. the use of solar water heater is dated back to 1900. Solar energy apparatus which we use need a efficient and proper thermal storage unit. Therefore, it largely depends on the method and apparatus which we will use to store thermal energy. The property of latent (PCM) should be such that it can store large amount of latent heat while changing its phase and also release the heat during night time. It is obvious that any energy storage systems incorporating PCM will comprise significantly smaller volume when compared to other materials storing only sensible heat. A further advantage of latent heat storage is that heat storage and delivery normally occur over a fairly narrow temperature range the phase change temperature. Solar water heater is one of the most popular methods to utilise the solar energy. Solar water heater accounts for 80% of the solar thermal market. But the limitation of solar thermal energy is that we can only use it in day time. So to overcome this limitation we can use the solar heating setup with additional setup of PCM (Phase Change material). The property of PCM is that is changes its phase during heat addition and store the heat in the form of latent heat and when temperature decreases it again changes the phase and release the heat energy. In this research we will analyse that this method is how much efficient. The following paper deals with the experimental investigation of effectiveness of a parabolic collector and its results have been verified experimentally.
Investigation of Solar Water Heating System with Phase Change Materials
International journal of engineering research and technology, 2018
Thermal energy storage has always been one of the most critical components in residential solar water heating applications. Solar radiation is a time-dependent energy source with an intermittent character. The heating demands of a residential house are also time dependent. However, the energy source and the demands of a house (or building), in general, do not match each other, especially in solar water heating applications. The peak solar radiation occurs near noon, but the peak heating demand is in the late evening or early morning when solar radiation is not available. Thermal energy storage provides a reservoir of energy to adjust this mismatch and to meet the energy needs at all times. It is used as a bridge to cross the gap between the energy source, the sun, the application and the building. So, thermal energy storage is essential in the solar heating system. Therefore, in this paper, an attempt has been taken to summarize the investigation of the solar water heating system in...
Solar Water Heating System with Phase Change Materials
Thermal energy storage has always been one of the most critical components in residential solar water heating applications. Solar radiation is a time-dependent energy source with an intermittent character. The heating demands of a residential house are also time dependent. However, the energy source and the demands of a house (or building), in general, do not match each other, especially in solar water heating applications. The peak solar radiation occurs near noon, but the peak heating demand is in the late evening or early morning when solar radiation is not available. Thermal energy storage provides a reservoir of energy to adjust this mismatch and to meet the energy needs at all times. It is used as a bridge to cross the gap between the energy source, the sun, the application and the building. So, thermal energy storage is essential in the solar heating system. Therefore, in this paper, an attempt has been taken to summarize the investigation of the solar water heating system incorporating with Phase Change Materials (PCMs).
Conceptual Design of Experimental Solar Heat Accumulation System with Phase Change Materials
2015
The research on solar heating systems often is faced with choice of carrying out experiments in real systems with changing parameters or to use modelling software with constant parameters but many undefined parameters or assumptions. The design of experimental system for simulating solar heat accumulation is proposed in this paper. The proposed design allows testing of phase change materials which provide higher thermal density compared to water. Results from computational fluid dynamic simulations carried out by other studies have been analysed for implementation into designing of the tank. All of these factors have been taken into account to create a system that resembles real case and can simulate for a long periods of time.
2017
Solar energy is clean and sustainable but intermittent in nature. Efficient storage of solar thermal energy is critical for its wider applications. This paper presents design and research on a thermal energy storage unit using phase change material (PCM). Aprototype of PCM heat exchanger with a helical coil tube was designed and fabricated for solar thermal energy storage, and was tested on a solar thermal experimental apparatus. This paper discusses the design concepts, selection of materials, as well as heat transfer analysis with the CFD tool Ansys Fluent. Keywords-Thermal; Energy Storage; Heat Exchanger; Design; Phase Change Material; Heat Transfer; Simulation; Testing.
On Enhancing Efficiency of Solar Water Heater Using Phase Change Material
The effective use of solar energy is hindered by the intermittent nature of its availability (5 to 8 hours/day), limiting the use and effectiveness in domestic application. The present work has been undertaken to study the feasibility of storing solar energy using Phase Change Materials (PCMs) and utilizing this energy to heat water for domestic purposes. The system consists of two simultaneously functioning heat absorbing units. One of them is a solar water heater sensible heat storing unit and the other a latent heat storage unit consisting of Phase Change Materials (Paraffin Wax). This paper presents a novel method of storing heat in Phase Change Materials, during (charging) the day time and supplying hot water even at night time, when solar radiation is not available. The performance of this PCM based thermal energy storage system is compared with, conventional sensible heat storage system and the conclusions drawn from them are presented here. Keywords: Heat transfer fluid, thermal energy storage, latent heat storage, sensible heat storage, phase change material.