Renewable energy deployment to combat energy crisis in Pakistan
© The Author(s). 2016
Received: 10 September 2015
Accepted: 3 June 2016
Published: 22 June 2016
The huge deficiency of electricity due to heavy reliance on imported fuels has become a significant impediment to socio-economic development in Pakistan. This scenario creates an increase in local fuel prices and limits potentials in the establishment of new industrial zones. The current gap between the demand and production of electricity in Pakistan is approximately 5000–8000 MW with a constant increase of 6–8 % per annum. Hence, more sustainable and renewable energy sources are required to overcome the existing problem. Pakistan is endowed with potential renewable energy resources such as wind, solar, hydro, and biomass. These resources have the capacity to be major contributors to future energy production matrix, climate change reduction efforts, and the sustainable energy development of the country. This article reviews the availability of alternative energy resources in Pakistan and associated potentials for full-scale development of sustainable energy systems. It also discusses exploitation strategies to increase the distribution of indigenous energy resources.
KeywordsEnergy crisis Sustainability Renewables Biomass Pakistan
The acute shortfall and burden imposed by oil importation creates a huge economic constraint for the country [5, 6]. Various efforts have been made by different governmental organizations and international bodies such as Asian Development Bank (ADB) and World Bank to stabilize the energy situation. They share similar objectives to enhance fossil fuel production for electricity generation. Unfortunately, governmental efforts to address concerns relating to energy security, climate change, and sustainable development have been minimal. Whilst little effort is put into increasing domestic fossil fuel (gas, coal, and oil) based electricity, the search for alternative fuel sources which are more sustainable and renewable should be a major national priority. Renewable energy in Pakistan was reported to be <1 % in 2010. However, Pakistani government has targeted to achieve 5 % of renewable energy by 2030 [7, 8]. The article reports on the potential and exploration of renewable energy as a major contributor to future sustainable energy pursuits in Pakistan.
Renewable energy potential in Pakistan
It has been projected that Pakistan will contribute up to 10,000 MW to its energy mix through renewable energy resources by 2030 . Therefore, timely and appropriate progress to exploit the potential of different natural energy resources will have a tremendously influence in meeting future projections.
Moreover, significant wind speeds were identified in the costal part of Baluchistan, particularly in Swat and some of the Northern areas. Out of 42 examined sites, seven have a capacity factor ranging from 10 to 18 % and are appropriate for Bonus wind turbines (Model 600/44 MK IV) . However, the potential of these sites is still being explored although the capacity is not enough to contribute to the national grid. NREL, together with the United States Agency for International Development (USAID), has identified a total gross wind resource of 346,000 MW in Pakistan, where approximately 120,000 MW can be technically exploited to power the national gird . Recently, a wind project with 500 MW capacities has been completed in 2013 . In addition, more than 18 wind turbine companies are approaching AEDB to install 3000 MW wind project . At the moment, the first phase of the Zorlu wind project generating 6 MW is in operation whilst a 56 MW plant is yet to be installed. Different wind power projects with a cumulative capacity of approximately 964 MW are at different phases of construction and would be completed in the near future. The Pakistan Council of Renewable Energy Technologies (PCRET) has installed nearly 150 small wind turbines ranging between 0.49 and 9 kW with a cumulative power output of 160 kW at the different areas of Sindh and Baluchistan, powering 1569 homes including 9 security check posts . Also, thousands of small wind turbines with a capacity of 300–1000 W have been installed by different Non-Governmental Organizations (NGOs), electrifying rural areas of Sindh province. Most recently, three villages of Baluchistan have been powered using a wind/PV hybrid system . With further investment and development, wind energy could become a major component of sustainable energy future in Pakistan.
Running cost evaluation for different energy sources 
Fuel cons: (USD/h)
Maint: cost (USD/h)
Solar panel (1 kVA)
Gas generator (1 kVA)
Wind turbine (1 kVA)
AEDB has estimated that Pakistan has about 2,900,000 MW (2900 GW) of solar power potential . The main obstacles to full-scale exploitation include (1) high cost, (2) lack of technology, (3) socio-political behaviors, and (4) governmental policy conflicts.
In 2003, the chief minister of Punjab launched the “UJAALA” program, where 30 W PV panels were distributed among university students throughout the country. This program aimed at encouraging people to utilize alternative energy and cut-down their dependency on the national gird. Another project introduced by the government was the “Quaid-e-Azam solar park.” This solar park is built to produce 2000 MW of electricity by 2015 . It is projected that the largest solar photovoltaic electricity production will be established after 2020 . PCRET has set up approximately 300 solar PV units of 100 kW capacities to power 500 homes, colleges and mosques, including street lighting . AEDB has powered 3000 families by installing 200 kW PV system together with 80 W solar charged lighting systems . Many NGOs are effectively working to install PV units in several parts of the country. The solar street lamps and solar charging lights for households are particularly of major interest. Pakistan has a target of electrifying approximately 40,000 villages via solar PV by 2015 .
Solar water heating
The solar water heating technology has been extensively applied in Pakistan with an annual growth rate of 245 % during the last four years [35, 36]. AEDB has started a Consumer Confidence Building Program (CCBP) to promote solar water heating system in Pakistan. The main objective of this program is to create awareness and build-up consumer confidence thorough various incentives. At present, there are 55 companies importing solar geysers, including 25 local manufactures . The main factors contributing to growth pattern are heftiness, affordability, technological reliability and increasing scarcity of natural gas. It is estimated that approximately 9500 of solar water heating units will be operated in the country by 2015, and projected to be 24,000 units by 2020 without any governmental subsidies . According to Han et al. , utilizing solar water heating technology instead of natural gas or conventional sources has significant advantages on economic, environmental, and social sustainability.
Solar water desalination
Solar desalination is a new and cost-effective technology to remove salt and other minerals from water for daily life applications. The technology desalinates brackish water or seawater either using solar distillation or an indirect method whilst converting the solar energy into heat or electricity [39–41]. It is an environmentally advantageous and cost-effective technology; hence, it is much patronized by communities in rural regions . Arjunan et al.  described the design layout and functioning principles of an installed solar water desalination unit in Awania, India. They reported that the distillation of brackish water using solar energy is an effective way to provide potable water for rural communities in arid and semi-arid zones. This makes it a potential technology to be employed in different areas of Pakistan where fresh water availability is limited such as Thar deserts and Cholistan regions. Most of the regions in the country have brackish subsoil water which is not appropriate for human and other living inhabitants ; hence, desalination by means of solar energy will be beneficial and sustainable in providing portable water for the rural areas of Sindh, Baluchistan, and Punjab  The government of Balochistan has installed two solar plants in Gawadar, comprising 240 stills and each plant has the capacity to treat up to 6000 g day−1 of sea water. Projects to develop the same solar plant system have been initiated in different areas of Balochistan and other province of Pakistan . The Pakistan Institute of Engineering and Applied Sciences (PIEAS) has fabricated a single basin solar still with an optimized efficiency of 30.62 %, being comparable to stills used globally.
Industrial solar water heating
Apart from domestic use, solar water heating system is also used in various commercial and industrial applications including laundries, hotels, food preparation and storage, and general processing and manufacturing. In the textile industry for example, water heating for dyeing, finishing, drying, and curing consumes approximately 65 % of the total energy . Processing and manufacturing industries also require water heating for various operations such as sterilization, distillation, evaporation, and polymerization. Solar thermal technology is one of the most effective solutions to achieve the desired temperature and productivity for the aforementioned applications . Pakistan is the fourth largest producer of cotton in the world; hence, this technology will contribute significantly to meet the water heating requirements of the cotton industry sustainably. As a major contributor to the economy of Pakistan, the textile industry is facing serious challenges in maintaining the global environmental standards. The industry is energy intensive; thus, high energy costs and persistent shortages in demand and supply impact negatively on the production and competitiveness of the industry. Full-scale operation of industrial solar water heating systems would contribute significantly to resolved energy problems faced by the industry. Energy is a crucial commodity on the international market, and its production and competitiveness are the functioning indicators [43, 44]. Water heating is an energy-intensive process and conventionally relies on the use of fossil fuels energy. Solar water heating technology can benefit textile industries in Pakistan by providing an economical choice and a potential alternative to conventional fossil-based routes. Mass implementation of solar water heating systems will also reduce the environmental impacts associated with fossil fuels significantly. Muneer et al.  reported a payback period of 6 years for solar water heating systems incorporated into Pakistan textiles industries. Muneer et al.  also examined the prospect of solar water heating system on Turkish textile industry and estimated a payback period of ~5 years.
In view of the existing enormous potential, solar energy offers a promising and useful option for Pakistan in various commercial applications. The government needs to consider this technology as an important source of energy and promote massive and rapid investments to meet the supply of power in rural regions such as Balochistan, Thar Desert, and Cholistan, where grid connectivity is not accessible.
Biomass is typically derived from plants, animals, and agricultural wastes. It has been in used for various applications such as cooking, heat, fuel, and electricity in rural areas. Broadly, biomass is classified into four major groups: (i) agricultural waste, (ii) municipal solid waste, (iii) animal residue, and (iv) forest residue . However, plants and animals are the main sources of biomass production. Almost 220 billion tons of biomass is produced globally each year from these sources, which is capable of producing substantial amount of energy without releasing high concentrations of carbon dioxide (CO2) and other greenhouse gasses compared to fossil fuels [48, 49]. Technically, they can be converted into different products either using thermochemical or biochemical methods. However, each of the conversion methods has its own pros and cons and process conditions such as characteristics of biomass feedstock and the desired end product . Biomass could be appropriate and effective for commercial exploitation to generate electricity throughout world, due to its characteristics for high value fuel products .
Biogas technology is highly advanced in China and India. More than 6 million domestic plants and nearly 950 small and medium units were installed in China by 2007, with an estimated production of 2 million m3 of clean burning fuel to meet 5 % of its total gas energy needs . A domestic biogas plant was launched in Tibet, China to explore the potential of cattle manure as feedstock, and this has been successfully implemented to improve the social and economic conditions of the region . Efforts have been made to implement biogas technology in Pakistan. The first biogas plant was constructed in 1959 to process farmyard manure (FYM) in Sindh . However, only in 1974 did the government of Pakistan start putting efforts into the implementation of residential biogas technology as an alternative source of energy. Plants with fixed dome, portable gas digesters, and small tanks/bags are the three most frequently used designs for biogas operating plants in Pakistan . Currently, Pakistan has more than 5000 installed biogas plants to meet its domestic fuel needs. These plants are efficiently producing up to 2.5 million m3 of biogas annually together with 4 million kg year−1 of bio-fertilizer [1, 61]. The total estimated nationwide biogas potential is about 13–15 million m3 day−1 [48, 62]. There are opportunities to utilize biomass to produce biogas in the country’s remote regions through community biogas plant networks. Almost 57 million animals exist in Pakistan with an annual growth rate of 10 % [60, 61]. The number is capable of producing enough biomass to generate over 12 million m3 day−1 of biogas, which is sufficient to meet the energy needs of more than 28 million peoples in the rural areas, along with approximately 21 million tons day−1 of bio-fertilizer [47, 63]. The collaboration between the Ministry of Petroleum and Natural Resources and the Directorate General of New and Renewable Resources (DGNRER) enabled the installation of more than 4000 biogas plants by 1974 to 1987. The plants were intended to produce about 3000 to 5000 ft3 day−1 of biogas for lighting and cooking applications . The scheme was divided into three stages. In stage 1, around 100 Chinese fixed-doom type plants were installed by DGNRER for demonstration purposes on grant-basis. In stage 2, the budget expenses for sponsorship was shared between the recipients and government, and in stage 3, all the economic sponsorships were withdrawn by the government though free technical supports continued but not reliable. However, the scheme failed due to the following reasons: (i) withdrawal of financial sponsorship by the government, (ii) technology was expensive to invest in and maintain, (iii) less technical awareness/training offered to the locals, (iv) lack of incentives, (v) low patronage or participation by the peoples, and (vi) ineffective demonstration . Pakistan Council of Appropriate Technology (PCAT) also collaborated with GDNRER to develop a renewable energy technology strategy under the Ministry of Science and Technology. In 2001, PCAT merged with the National Institute of Silicon Technology to form Pakistan Council of Renewable Energy Technologies (PCRET). The council develops and disseminates biogas plants and other suitable options of renewable energy generation into communities in the remote areas . Currently, approximately 1250 biogas plants have been installed with 50 % of the cost shared between the recipient and PCRET . On top of that, three community based plants were installed in the remote parts of Islamabad, supplying energy to about 20 homes. Sahir and Qureshi  suggested that by installing pilot size plants, the available biomass can be used to operate high level biogas plants based on crops and dungs in the remote regions and street wastes in the urban areas. A biogas plant of 1000 m3 capacity has recently been set up in the area of Cattle Colony, Karachi , and the trials and preliminary operations of the project were sponsored by New Zealand Aid (NZAID). There are 400,000 cattle in the area, producing wastes as the feedstock for the biogas plant. The initial generation capacity is ∿250 kW of power, and this will be increased to 30 MW with 1450 tons day−1 of fertilizer. Another biogas plant at Shakarganj Mill, with the capacity to produce up to 8.25 MW, is still under construction through the help of AEDB . In addition, PCRET aims to provide alternate renewable energy system in rural households/villages by installing 50,000 medium-scale biogas plants at various locations in the country by 2015, with total annual biogas generation capacity of 110 m3 [1, 48]. Biogas productivity and quality is greatly influenced by the waste type, waste composition, and operational parameters such as temperature, feeding rate, retention time, particle size, water/solid ratio, and C/N ratio . A temperature range between 30 and 40 °C is found to be optimal for high biogas production rate . Feedstock available and batch loading are also important parameters for efficient biogas plant operation and help to maximize biogas yield. However, over or under loading of feedstock and water affects the overall efficiency of the process. It has been observed that carbon is consumed 25 times faster than nitrogen during anaerobic fermentation by microorganisms. Therefore, to meet this requirement, microbes require 25–30:1 carbon to nitrogen ratio with most of the carbon degraded within the minimum retention time [68, 69]. Retention time refers to the digestion period for which the waste remains inside the digester. It is estimated to be average 10 days to few weeks depending on the waste composition, process parameters location of plant and atmospheric conditions . The digestibility of waste is essential to promote its decomposition into simple organics and biogas products. The digestibility is usually enhanced by treatments using calcium hydroxide, ammonia, and sodium hydroxide. Water and urea can also improve waste digestibility .
Bioethanol and biodiesel
Pakistan has a considerable potential to produce biofuels such as bioethanol and biodiesel. The establishment of these biofuels will help reduce the oil demands of the country of which 82 % is sourced by importation. Various initiatives have been commenced by the government to increase biofuel production. Pakistan Sugar Mills Association (PSMA) is the agency responsible to develop bioethanol production in the country. Sugar millers offer incentives and materials such as fertilizers and pesticides to sugarcane growers to enhance crop production and maximize bioethanol production . In 2007, only 6 out of 80 sugar mills in the country had the facilities to convert raw molasses . With the existing production rate of sugarcane, Pakistan has the potential to produce more than 400,000 tons year−1 of ethanol. However, only about a third (120,000 tons) is produced currently . Though several small projects have been carried out to evaluate the commercial applications of bioethanol, significant efforts to develop and promote bioethanol are still lacking due to ineffective government policies and lack of infrastructure for large-scale manufacturing. Also, a major portion of the limited bioethanol produced is traded in different forms such as alcohol and molasses.
A significant potential to produce biodiesel also exists in Pakistan through the use of castor bean, a self-grown crop found in different parts of the country. It is estimated to produce more than 1180 kg oil ha−1, which is significantly higher than other biomass such as corn (140 kg oil ha−1), soybean (375 kg oil ha−1) and sunflower (800 kg oil ha−1) . Due to its high oil content, castor bean can be a promising alternative feedstock for biodiesel production. Castor oil has the advantage of being soluble in alcohol under ambient temperature conditions, and this is beneficial to biodiesel production. It is an untapped resource in the country; thus, utilization for biodiesel production will not only contribute to meeting the energy demands of the country but also emerge as a value-adding process that can promote economic, social, and environmental sustainability of the country.
Hydropower in Pakistan
Based on the flow of water, hydropower power plants are classified into small and large. Large hydro power plants require large dams together with water flow control mechanism [75, 76], whereas small hydro power plants (SHPPs) are used to extract energy from low volumes of water flow such as canals, rivers, and streams . SHPPs are run-of-river systems, and thus do not require any extensive structures such as dam to store water, leading to significantly low environmental impacts [77, 78]. Hence, SHPPs are considered ideal renewable energy generation. Hydropower is one of the most established and reliable renewable energy, contributing approximately 20 % to worldwide energy market . Hydropower plays a leading role in the total energy mix of several countries in the world. Norway accounts for more than 95 % of its power generation from hydropower and Brazil is almost 88 %. Similarly, Canada produces 70 % and Austria produces 65 % of hydropower to meet their energy needs . India incorporated domestic fluvial systems by integrating its main rivers to improve hydrological control and to increase their hydropower production to 54,000 MW in 2012 [78, 79]. Hydropower is also a major energy source in China, and it is projected to contribute 27,000 MW of the total energy by 2020 . The technology is ongoing in 27 countries in Asia, and countries such as India, Iran, Bhutan, Japan, Kyrgyzstan, Tajikistan, Turkey, Vietnam, and Pakistan [79, 80].
In addition, WAPDA have completed a feasibility study of run-of-river hydro projects with combined installed capacity of approximately 21,000 MW at various locations in the country. This includes Bunji (7100 MW), Tarbela fourth extension (1399 MW), Kohala (1095 MW), Lower Palas Valley (660 MW), Mahl (599 MW), and Lower spat Gah (495 MW) [14, 81]. Apart from these run-of-river projects, there is also a high potential for large-scale reservoir projects (dams) including Diamer Basha (4400 MW), Dasu (4250 MW), Munda (735 MW), Kurram-Tangi (80 MW), and Kalabagh dam (KB) (3600 MW). Apart from electricity generation purposes, dams are also used to control flood in Pakistan. One of the dams used for that purpose is Kala-bagh (KB). At the provincial level, there are some objections for its construction; however, the perception has changed when the dam was used to control flood and saved lives during 2010’s flood . On that incident, over 2000 people were killed; $ 9.7 billion loss of economy and more than 20 million people were highly affected in terms of their lives, homes, and crops [84, 85]. Sindh and Khyber Pakhtunkhwa provinces were the worst affected, those suffered immense losses . This massive destruction resulted long-lasting impacts not only on social human life and economy but it has also resulted in destruction of natural environment posing land erosion, killing of wildlife and other natural resources .
The feasibility study of the KB dam showed the construction of a 260-ft high rock-fill dam that would be able to store approximately 7,400,891,131.92 m3 of water . The dam consists of two spillways for effective distribution of flood water for instant and appropriate water disposal. During probable floods, these spillways are able to discharge more than 2 million cusecs of water . The mean annual river flow at KB is high, approximately 111,013,366,978.8 m3 due to the additional nullahs and other tributaries that join the Indus River between KB dam and Diamer Bhasha dam. So, the approximate volume of flood to be managed at KB dam is around 2,200,000 cusecs . Therefore, the development of KB dam is important to the government for flood management which capable in preventing future flood risks and combat energy crisis. To realize the full benefits of hydropower generation systems in Pakistan, crucial policy reforms are obligatory to develop hydropower by enhancing sustainable generation capacity.
Summary of all renewable energy resources and their current status
Technically exploitable potential
5 commissioned projects
9 projects under construction
Projects under feasibility study
Technically exploitable potential
Quaid-e-Azam solar park (commissioned)
6 projects under development
3 projects under development
22 projects under development
Technically exploitable potential in 2010
Sugar Mills Ltd (Unit-II) at Rahim Yar Khan (Operational)
Sugar Mills Ltd (Unit-III) at Ghotiki (Operational)
13 projects under development (at different locations in country)
Technically exploitable potential
7 projects under development
9 projects under feasibility study
This work has been supported by the Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, Malaysia.
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