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SUSTAINABLE ENERGY RESOURCES

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Introduction

The assignment highlights the essence of storing energy in solving the energy problem. There are different types of energy storage devices or storage methods, a few of which are already active, while others are still in the phase of development. This report will look at the principal characteristics of the various techniques of electricity storage in the battery and their application field (short-term storage, longer power required and permanent or portable). These characteristics will help in making the comparison in judging the best technique for several types of applications.

Principal characteristics of the techniques of energy storage

There are several methods of storing the energy, which contributes to sustainable energy resources (Tateno and Jsv, 2016). These storage methods can also be classified further according to the following criterion:

a)    Application type - whether its portable or permanent

b)   Duration of storage - whether its long or short term

c)    Production Type - whether there is a requirement of maximum power or not

Hence, it is of that much necessity to judge and analyze the same on the basic characteristics (economical and technical) of these systems to bring contrast criteria in opting for the good technology (Twidell and Weir, 2015). However, the good characteristics of these storage systems depend on the following factors:

  Capacity of storage

Storage capacity is the number of energy available in the battery after it is fully charged. Though discharge is often incomplete, hence, it is stated with reference to the storage of total energy. The energy, which is usable, gets limited according to the discharge depth, and it represents the depth of discharge limit (least-charge state). In the context of fast discharge or charge, the efficiency continuously weakens and this retrievable energy can be much lesser than the power of storage (Ellabban et al. 2014). In the other side, it is a very weakening issue under a tremendous slow regime.

    Power Available

This is the power, which retrieves the size and constitution of the battery in the long chain of stored energy. According to Akhtar and Rehmani (2015), it is written as the average value, as well as the high value, which is quite often calculated to present the highest power of discharge or charge, Pmax (W).

   Discharge depth or transmission rate of power

The storage of energy is a much slower process, which must release energy quickly on demand in a continuous process (Luthra et al. 2015). However, the discharge or power output may evolve to be a reducing factor termed as the rate of transmission of power. This speed of delivery finds and calculates the total time required to extract the energy stored in the battery.

Discharge time depends on the constant power, operational conditions, discharge depth of the battery, and becomes a unique feature of the competency of the battery, which is needed in running certain applications. The problem in distinguishing the energy and power dimensions of the whole battery makes it quite problematic in choosing a constant optimum time in several storage batteries.

    Efficiency

This equation may look critical; however, it can be oversimplified as it depends on a lone operating point. Yet, batteries have self-discharge, losses too. Efficiency has a defining factor termed as instantaneous power. In order to make the storage battery to become more sustainable, it should have a good efficiency, which means that the transfer of power chain must have a limited loss while transferring energy and during self-discharge. This measure of conservation energy is a key issue for load-leveling network applications.

   Durability

Durability implies to the accumulated peroiod of cycles the unit storage which is able to release the level of energy after each recharge as it was designed for, has been represented as the maximum number of periods “N” 

   Autonomy

Autonomy implies to the highest duration of time that the battery requires emitting energy continuously. It is defined by the ratio of the capacity of energy and highest discharge power, which is represented by, the below given mathematical expression:

Problems with the batteries

A battery needs to cope up with several factors such as:

  Combating with the climatic changes

The usage of these energy storage devices such as batteries can substantially decrease the production of the greenhouse gas by enhancing the substantial generation of renewable power. It would simply lower the hooking up cost of these resources and thereby manage the variability of the generation.

       Making renewable energy more and more viable

The major issue with the renewable energies is the fleeting nature of these energy storage systems. As the wind blows or the sunshines, the produced electricity is, must be lost or may be used up. On the other hand, when the weather is a bit cloudy or the wind is not blowing, a power supply may not be readily available in order to meet the demand. These batteries address this severe problem by holding excess forms of energy during the time of releasing it at leaner times and productive times.

Recommendation

While using a battery as a storage device, it should be kept in mind that these storage devices can create various problems. It is highly recommended that the power should always be available for delivery at any time, even during peak hours, which means that if the amount of energy used is significant, then it represents a design of a non-optimum system or even a limit of the storage batteries. On the other side, when the weather is a bit cloudy or the wind is not blowing, a power supply may not be readily available in order to meet the demand. These batteries address this severe problem by holding excess forms of energy during the time of releasing it at leaner times and productive times.

Conclusion

This assignment had highlighted the main principal characteristics of battery storage systems, whether it really solve the problems relating to energy or not. These characteristics include storage capacity, available power, discharge depth or transmission rate of power, discharge time, efficiency, durability, and autonomy had been thoroughly discussed along with a proper analysation. In order to discuss this issue, several characteristics of these batteries are analysed with its drawbacks and limitations. This report had looked at the principal characteristics of the various techniques of electricity storage in the battery and their application field (short-term storage, longer power required and permanent or portable). These characteristics will help in making the comparison in order to judge the best technique for several types of application.

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