WIND AND SOLAR ENERGY POTENTIALS AROUND SOUTHERN SINDH & SOUTHERN BALUCHISTAN PROVINCES, ESPECIALLY KARACHI OF PAKISTAN

Electrical energy has a vital place as it amounts to be the basic necessity of sustainable life and necessitates itself for the development of human capital leading to general economic uplift of a nation. 
Pakistan has remained in the serious shortage of electric power leading to adverse effects on the state. Around 70 percent of Pakistanis are living without a stable electric supply. Those who are lucky enough to have access to electricity undergo around 12 to 14 hours of load- shedding. Pakistan is always in the lack of enough conventional sources of energy. Adding to this it is the fact that Pakistan has not made any significant steps to tap renewable energy resources like wind and solar energy. It seems very natural for Pakistan to employ the natural resources of energy which are yet to be tapped and are coming into the fulfillment of the shortage in the supply of energy. In this paper, the existing potential of renewable energy resources is studied as a viable alternative to the current state in the energy supply and demand. Southern Pakistan is presented to hold key renewable resources such as wind and solar energy to address the energy shortfall. Southern Pakistan, mainly coastal regions, possesses wind and solar potentials. The paper chooses selected areas in southern Pakistan containing an adequate level of wind power. The paper attempts to argue that renewable energy resources can meet the energy demand of the southern regions mainly coastal ones. The paper attempts to look at the current and future challenges in the transition to wind and solar power.


INTRODUCTION
Comparing with other developing countries, Pakistan is facing serious energy crisis since the past several decades leading to an ever-increasing energy demand necessitating making it seriously dependent on import of pricy fossil fuels. In the villages of Pakistan, there is almost no electricity & cities are facing bitter load shedding problems (Ashfaq & Ianakiev, 2018). Load shedding is 14-18 hours in villages and 8-12 hours in cities. The customers located in residential, industrial and commercial sectors are badly affected making it an immense challenge for the government sector power infrastructure to ensure sustainable power. If we do not encounter these burning issues of electrical energy on a priority basis, then in future there will be the worst situations of electricity in Pakistan. A large number of research attempts is needed to explore the renewable energy (RE) resources to attend the gap between the supply and need. However, the renewable energy sector is yet to penetrate in the present conventional energy infrastructure predominantly located in northern and central regions (Kamran, 2018).
Pakistan has energy resources, renewable and non-renewable. Renewable energy is considered environment-friendly while the non-renewable energy is harsh for the environment. The sources of renewable energy are solar, wind, tidal, geothermal, biomass, hydro and thermal. Mostly the developed countries of the world depend on non-renewable energy resources to meet the energy demands. Also, the developing countries especially Pakistan still rely on the expensive fossil fuel based energy system which is expected to deplete shortly (Sher, Murtazs, Addoweesh & Chiaberge, 2015;Tahir & Asim, 2018). The non-conventional energy resources have been exploited to reduce fossil fuel-based local and commercial consumption bit by bit. As such, energy has earned the best quantity of attention globally than ever before. The energy crisis is already affecting the developing countries like Pakistan. Pakistan has 93.5% electricity rely on the oil, natural gas, hydropower, nuclear energy, coal and a little bit on the RE. Pakistan is mostly dependent on expensive fossil fuel. Pakistan utilizes 25.7% of natural gas, 37.2% of oil, 30.7% of hydropower, and 4.8% of nuclear energy (Index Mundi, 2018). 0.1% of coal and only 0.8% of it is based on the RE to fulfil the energy demand of Pakistan up to 2015 as shown in Figure 1. The past and the present attempts aimed at curtailing the existing energy crisis rendering the most of the urban areas suffering from power outages for 12 hours on a regular basis. According to the International Energy Agency, Pakistan has a vast proportion of its population which does not have access to energy. The most population of the country is even not connected to the national electricity grid. The population with access to on-grid electricity is enduring load shedding on a daily basis. This illustration is shocking which requires immediate attention. The policymakers are required to feature such type of energy resources that overcome the current demand of the country (Best & Burke, 2018;Wakeel, Chen & Jahangir, 2016;Asif, 2009;Harijan, Uqaili, Memon & Mirza, 2009).
The geography of Pakistan is blessed with a lot of solar and wind energy throughout the year. In normal days Pakistan gets 7.5 hours of sunlight each day having 6 kWh/m2 average solar radiations along with most of the territory of the country. In earlier days, Pakistan never utilizes the energy potential but later 1991 the government acquires an interest in the technologies. Then different departments, boards, companies & corporates are working in developing technologies.
Pakistan is highly relying on foreign expensive fuels. It is, therefore, time to utilize the available rich potential of the renewable energy resources within Pakistan. The solar, wind and biomass are excessively available in Pakistan. These renewable energy resources are economical and environmentally friendly and highly careful regarding sustainability. The renewable energy resources are very much encouraged able at the position of the expensive fossil fuel-based resources. The available unchecked renewable resources can meet the current energy demands that facilitate to conserve the standard of current resources that are early decreasing. This paper provides a detailed description of the unchecked areas in Pakistan where there is a high potential for renewable energy. The proposed research aims to explore the RE potential. The southern Sindh and southern Baluchistan provinces especially Karachi have a lot of opportunities in wind & solar energies. In this paper, these potentials will be explored with the help of real-time analysis of solar & wind measurements (Halacy, 1980;Kumar, 2017;Usman, Hussain, Ahmad. & Javed, 2015;Baloch, Kaloi & Memon, 2016).
There is square measure virtually no grid interconnection of the alternative energy at the established stage. The dynamic circumstances are significantly changing from the conventional power resources to the non-conventional energy resources. Solar and wind are the best resources to contribute to the national grid in the current situation. Pakistan government constructs the three wind farms interconnection network and lots of others in the pipeline. The federal policy on wind energy system has recently modified for the future task. The continued schemes of the wind park have gotten slow because of low maintenance. The planned analysis paper gives detail developments within the wind energy sectors of the country. Additionally, the suggestions which will contribute to boosting the penetration of wind energy within the national sector are highlighted in Pakistan (Shahzada, Nawaz &Alvi, 2018;Farooq & Kumar, 2013).
The wind and solar energy are the cost-effective non-conventional sources of energy. Pakistan has a high potential for renewable energy due to its geographical location. Pakistan has unlimited potential of RE, e.g., 2,900,000MW of solar, 346000 MW of wind, 3000MW of biogas, 2000MW of tiny hydropower and 1000MW from waste. Pakistan has high RE potential but still relies on expensive fossil fuel. Pakistan has so much noted area like southern Sindh and southern Balochistan where there is the great potential of renewable energy to alleviate the current increasing demand. Pakistan is still unable to use these noted sites of the two provinces of the country. The Sindh and Baluchistan have the potential to fulfil the current demand of the country. The proposed study is based upon the potentials of wind and solar energy around southern Sindh and southern Baluchistan Provinces of Pakistan (Mirjat, et al., 2017;Wakeel, et al., 2016;Sadiqa, et al., 2018;Yuan, et al., 2018). This ly among 250 Km of the southeastern and 800 Km of the southwestern regions of Asian nation. The annual wind speed information is reported for variable heights of those predictable sites. The wind energy around these areas that represent to possess an associate degree. The annual average wind speed of 6.63 m/s and 5.33 m/s correspondingly. The facility of yearly generation from these noted locations of two provinces is 7.653 GWh, and 5.456 GWh. This study conjointly elaborates the benefits and side effects. The generation of electricity from the wind and solar within the selected remote zones areas will offer the economical and relatively best implementation to the national off-grid system. The findings of this research can facilitate the government, local and industrial sector. The proposed acceptable research will attract the investment for the wind and solar energy to eradicate the on-going electricity crisis within the country (Moretto, Branca & Colla, 2018;Ishaque, 2016;Ashfaq & Ianakiev, 2018).
In the past, there were no such real-time data of solar and wind measurements in Pakistan. The planner has worked on solar and wind energies in Pakistan. The real-time measurements of solar and wind energies are highly good from all orientation. The Karachi is the biggest city of Pakistan, has great potentials of solar and wind energies. Previously, there is no data available for wind and solar measurements of the megacity. The proposed research sources are depending on the World Bank (WB) data. In Pakistan, WB has started to gather data of solar measurements of different cities from April 2015 & wind measurements from September 2016. But in Pakistan, there is no coordination with these real-time data (Ashfaq & Ianakiev, 2018;Shoaib, et al., 2017).

2.1.SOLAR MODELS
The photovoltaic model provides long-term averages of solar radiation such as global, diffuse and direct normal. The given models are signifying solar efficiency. The solar thermal energy technologies, on the other hand, for example, the Concentrated Solar Power (CSP) and Concentrated Photovoltaic (CPV) rely on Direct Normal Irradiation (DNI). Terrain elevation determines the best site and concert for the solar PV as described in Eq.1.
Eq.1 DNI is the relevant photovoltaic concentrating technologies as Eq. 2.
Eq. 2 DHI is the solar irradiation component as given below in Eq. 3.

Eq. 3
GHI is considered as a climate reference as it enables comparing individual sites or regions as referring to Eq. 4.

Eq.4
Air temperature is taken at 2 meters above the ground. Air temperature, in o C or o F, determines the temperature of PV cells and modules. The air temperature and also some other meteorological parameters are an important part of each solar energy project calculation as they define the functional circumstances and working proficiency of the solar PV as given in Eq.5.
Eq. 5 Photovoltaic, generally, is the most applied and versatile technology. The Atlas continually indicates the estimation of yearly average values of power generation for PV systems that enormously use the World Bank parameter for installation of the solar power plant. The PV electricity simulation program, based on an algorithm, is combined within the atlas which always provides a secondary approximation of the potential electrical occurrence energy, which may be made at any location ruled by the interactive map as given below in Eq. 6.

WIND MODELS
Pakistan is the country in the world where there are great wind energy potentials. Electricity, in large quantities, can be produced by taking advantage of the available renewable energies.

Eq. 12
The wind energies of southern Sindh and southern Baluchistan of Pakistan especially Karachi have been investigated with the help of available World Bank data.
The wind energies of the selected regions give the commendable measurement which can be exploited to generate the great amount of wind energy. Eq. 13 Eq. 14 The required parameters like turbulence intensity, min. wind speed, max, wind speed, mean wind speed & wind speed standard deviation have been studied to extract the wind energy. According to the analysis of the World Bank data, these parameters are based upon the World Bank wind calculations. The parameters are used to show the data of the provinces especially Karachi. The World Bank chooses these parameters to calculate the wind potential of Pakistan as shown in Eq. 12 to Eq. 14.

SOLAR RESULTS FOR SOUTHERN SINDH
In solar energy, some parameters like global horizontal irradiance (ghi), DNI (direct normal irradiance, DHI (diffuse horizontal irradiance), air temperature and relative humidity have been analyzed. According to the analysis, these two provinces including Karachi have the great solar energy potentials as shown in Figure 2. The solar panels in large quantities can be installed in these noted areas to get the maximum amount of electrical energy. Also, the solar potential of the Hyderabad shown the great potential as refer Figure 3.

SOLAR RESULTS FOR SOUTHERN BALOCHISTAN
In solar energy, some parameters like global horizontal irradiance (GHI), DNI (direct normal irradiance, DHI (diffuse horizontal irradiance), air temperature and relative humidity have been analyzed. According to the analysis, these regions including southern Sindh and southern Balochistan have great solar energy potentials. This is proved to form the result of the World Bank group. The solar potential of the southern Balochistan is shown in the Figures 4-5. The solar panels in large quantities can be installed in these noted areas to get the maximum amount of electrical energies.

WIND RESULTS FOR SOUTHERN BALOCHISTAN AND SOUTHERN SINDH
Pakistan is one of the countries in the world where there are great wind energy potentials. Electricity, in large quantities, can be produced with the help of these renewable energies.
In this study, the potentials of wind energies of southern Sindh and southern Baluchistan especially Karachi have been analyzed. The real-time data measurements of wind energies of the regions have been examined as shown in Figures 6-9. In wind energy, some parameters like turbulence intensity, min. wind speed, max, wind speed, mean wind speed, and wind speed standard deviation have been investigated. According to the analysis, these provinces especially Karachi have abundant wind potentials. It is proved from the Figures 8-9 that the wind potential of the southern Sindh provinces is more than the southern Balochistan. Wind turbines can be installed in these areas to get a lot of electrical energies. The parameters for the wind installation are the following: • T I = a20_turbulence_intensity • ws_max = a20_wind_speed_max • ws_min = a20_wind_speed_min • ws_mean = a20_wind_speed_mean • ws_sd = a20_wind_speed_stddev     The below map as shown in the Figure 11 describes the ghi for the Karachi. It is clear from the map that there is very good ghi condition in the selected areas especially Karachi. The map defines the huge amount of irradiation as 1967 KWh/m2 per year which will play a significant role for the power generation.  If work is planned to install the solar power project in these noted areas, then the country will never be more dependent on the existing expensive fossil fuel. The southern Sindh and southern Baluchistan have high potential to generate the abundant economy for the country. It is clear from the Solargis model that Pakistan is a geographically rich country and it is the need to fulfil the existing demand by utilizing the proposed study.

WIND POTENTIAL ANALYSIS
Pakistan is one of the countries in the world where there are great wind energy potentials. The potentials of wind energies of southern Sindh & southern Baluchistan of Pakistan especially Karachi have been analyzed with the help of available World Bank data. The wind energies of the selected regions have been analyzed. The southern Sindh and southern Balochistan have a respectable amount of the wind that can be utilized to generate valuable electricity for the country.
The analysis of proposed study rediscovers the energy potentials of two provinces especially Karachi of Pakistan. The southern Sindh and southern Balochistan have great wind energy potentials as shown in the Figure 13. There is a need to plan to install the wind turbines in these areas to get a lot of electrical energies. The wind speed in the coastal area of southern Sindh and southern Baluchistan describes the more availability of the wind energy in these areas as shown in the Figure 13. The below map describes the power density at height 100m for wind measurements in the Sindh province of Pakistan. Also, the map defines the wind power density potential in Pakistan. It is clear from World Bank data that there are a lot of wind energy potentials and overall good wind speed condition in noted areas of Pakistan as shown in the Figure 14.

CONCLUSION
The solar and wind energy potentials have been observed in southern Baluchistan and southern Sindh especially in Karachi region of Pakistan. However, southern Pakistan, mainly coastal region possesses great wind and solar potentials. Also, it has an adequate level of wind as well as solar power generation due to its geographical status. The wind resources can meet the energy demand of the southern regions mainly coastal areas. The southern Sindh and southern Baluchistan regions can generate valuable energy by the installation of small and large renewable power plants. The generated renewable energies can be added to the main grid stations to overcome the shortage of electrical energies. The planners need to focus on the proposed areas for renewable energy generations.