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South Africa ’ s integrated energy planning framework , 2015 – 2050

The Integrated Energy Plan (IEP) was designed to consider South Africa’s energy needs from 2015 to 2050, as a guide for energy structural savings and the development of energy policy. The main aim of the Department of Energy is to ensure the security of energy supply. The current energy situation in the country has its gains and challenges. With the growing population and infrastructural development, the country requires prudent measures to meet the country’s energy needs for 2020–2050. The country’s energy is currently dominated by coal-fired plants, which represent about 70% of the total installed capacity, crude oil contributes about 21%, with only 9% from all other energy sources, including renewables. This paper examines the scope of the IEP framework, key objectives of the IEP, the methodology applied to achieve those objectives, and the projections made for attaining the framework target. The paper further reviews the energy requirements for the key sectors of the economy and analyses the effects of CO2 emissions and the benefits of job creation for the entire period. Despite substantial renewable potential in South Africa, at present it contributes as little as 2% of the energy mix. The global renewable energy policy on CO2 emissions reduction, improvement of energy efficiency and deployment of renewable development are not met in the IEP framework.


Introduction
The Integrated Energy Plan (IEP) is South Africa's overall energy plan of action for electrical power, gas and liquid fuels. The Integrated Resource Plan (IRP), on the other hand, as a component of the IEP gives an elaborate strategy for energy requirements. The IEP is responsible for the energy demand forecasts for a certain period and provides alternatives as to how these demands can be supplied [1,2]. It includess four scenarios that give rise to different stages of energy demand; however, the IRP uses the Council for Scientific and Industrial Research (CSIR) electricity demand projections [3]. In 2016, the South African Cabinet approved and promulgated the final IRP policy, thereby giving a legal backing for the energy ministry to decide the required capacity to be added onto the grid system. The revised edition of the IRP energy policy was published in 2019, but the CSIR's initial assessment indicated that the document plans for the short term and does not provide energy policy beyond 2030 [4,5]. Technological disturbance makes it difficult to plan beyond 2030, but long-term energy planning is needed in this instance [70].
The lifeblood of every economy largely depends on energy for all sectors. The IEP is, therefore, needed to make sure that energy service requirements are met in the most efficient, affordable, and sustainable way, while curtailing negative influences on the environment [6]. A dearth of planning for the energy sector can lead to under-investment in the desired energy infrastructure. The main objectives and purpose of the IEP are clearly stated in SA Act No. 34 of 2008 on energy [7]. The IEP is also a complex, long-term energy plan with many aims. It is therefore imperative to develop a workable mechanism for energy policymakers to measure and provide answers to the challenges the energy sector may encounter [4,8].
The IEP includes an exhaustive investigation into the gains as well as inadequacies of the entire energy scheme [9,10]. The IEP is therefore intended not only to ensure that the required energy is supplied, but also that the cross-sectorial influences are investigated and dealt with methodically [11]. Accordingly, it is vital to consider the broader objectives of the country and outside influences that typify the sector in the energy planning process [12]. This paper, therefore, reviews the entire IEP framework and proposes future directions, with a specific focus on renewable energy sources (RES) and CO2 emission reduction.

Methodology
Content analysis [69] was used as the main methodology for the paper. Seven criteria were identified from the ten papers in reputed journals (selected from the seventy-one listed references), presented in Table 1. Directed content analysis [69] was used  where existing theory or prior research studies were observed, and the unit of observation was the use of renewable energy and the IEP. Wright et al [15] explained and thoroughly discussed the shortfalls of the 2016 IRP and the need for the implementation of the 2019 IRP. The cost-competitiveness of solar and grid integration were discussed by Quansah et al [7]. Adom et al [21] quizzed the variance/uncertainties in prices of electricity in the African context. Paska et al [32] worked on RES with regards to the EU energy policy and its impact on energy planning systems in Africa. Optimal integration and other economic considerations like hydrogen-based energy storage systems were discussed by Serra et al [35]. Benavente-Peces et al [38] analysed energy efficiency and classification of energy usage in various sectors. Revenues and impacts of invest-ment costs were discussed by Zhang et al [42]. Both Tucki et al [45] and Zoundi et al [56] worked on CO2 emission reduction and, finally, Akom et al [70] suggested energy policy direction guidelines and framework.

Panorama of energy planning
The IEP reflects on the steadiness of the national energy demand and supply, and suggests other plans for capacity development, according to the varying sets of expectations and constraints. It gives details on grid systems and electricity transmission and distribution -controlled by Eskom [14,16]. Other areas covered by the IEP are the Gas Utilisation Master Plan (GUMP), checks on the bottlenecks and volume, and restraints of the natural gas structures. All the aforementioned had to be considered in the IEP to allow general progress via sporadic iterations to guarantee alignments [17,18].

The scope of the IEP
The IEP framework considers every energy transporter, every technological possibility and every important national energy policy necessity and suggests alternative policy recommendations of the energy mix [4,15]. Figure 1 indicates the scope of the IEP framework that covers all the important features of the national energy valuechain [19], done to ensure the attainment of the energy sector objectives in an optimum manner.

Objectives
The development of the IEP started with a comprehensive review of the previous policies such as the National Development Plan (NDP), the New Growth Plan (NGP), the National Transport Master Plan (NTMP), the Climate Change Response Policy, and the carbon tax proposals. All these overarching national policies were reviewed thoroughly and put together to form the IEP as a single document to provide a roadmap of the future energy sector landscape for South Africa. Nine key objectives were identified in the IEP: the assurance of energy security; affordable energy supply; diversification of energy sources; regular access to energy; CO2 emission reduction; energy efficiency improvement; localisation and job creation; conservation of water resources; and technology transfer [4,14,20]. Figure 2 indicates three main thematic areas: economic development, social development, and environmental sustainability. These are key sectors of the country's energy development and the development of the IEP. The IEP's overall objective was to make sure that sufficient, maintainable, and dependable forms of energy for the consumers are provided. A sufficient backup margin of about 19% for power generation should be adopted for the energy sector, business and all other aspects of the economy as well as for citizens to ensure an affordable energy supply.

Scenarios
Four scenarios were created by the IEP to identify possible future energy generation for South Africa; they are [5,20]: • To assume the implementation of the existing policies and to make sure the country benefits from it financially. • The constraint of resources was identified as a result of high prices of the fossil fuel used for the generation • The country will pay more for externality costs coupled with constricted emission restrictions in order to create environmental awareness. • The NDP can only be implemented for high economic growth by shifting from primary minerals to industrialisation.

Assumptions
The IEP considers the rate of GDP growth as essential when future energy demands are calculated for economic assumptions. The assumptions were classified into three stages -for short-, medium-and long-term planning. The IEP assumptions on microeconomics are seen in the upper part of Table 2a [21]. Here, the figures are obtained from the recent National Treasury estimates of in-house growth data, while the figures at the bottom line of Table 2b were obtained from the November 2016 presentation made by the Treasury [22]. Both tables include some projections on GDP growth based on current statistics.    [17].

Overview of the energy sector
In 2014, South Africa was placed 83 rd on the Energy Sustainability Index of129 countries by World Energy Council [46]. However, in 2020, South Africa improved its performance to 74 th position [46]. The supply of South Africa's energy is dominated by coal, which represents about 70% of the total installed capacity; crude oil, natural gas and nuclear power contribute about 29%, with less than 2% from renewables [49,50], as indicated in Figure 3. A further check-in [47,51] discloses that coal contributes about 90% of the power generated, 3% of nuclear, Natural gas 5%, and other RES such as biomass, wind, solar, bagasse, and landfill gas together contribute only 2% of the total energy mix, which falls below the global standard.

Key policy issues
The major challenges facing the South African energy sector, such as energy security assurance, CO2 emissions reduction, and energy efficiency enhancement in the economy, can never be resolved by market activity alone [24]. For proper delivery of service to the general public, government intervention in some cases, through policies and directives, is needed to attain certain policy goals [29]. The 2016 IEP framework was developed with all sectors of the economy in consideration with the existing policies. Though several policies of government have impacted positively on the energy sector, some strategies ought to be technologically advanced in energy usage on petrol, electricity, gas, and coal. Another important element that was identified through the IEP process was to safeguard alignment and recognise collaborations made with other government strategies [5,32]. This section also recognises some of the important strategy subjects that have been well thought-out in the IEP process and sector plan as indicated by Szabo et al (2013) [33].

Demand and supply energy forecast and analysis 9.1 Demand
To ensure energy security is the first aim of the 2016 IEP, to make sure that South Africa is not short of energy supply within the time frame [37]. To achieve this target, broader consultations were made between the energy and the economic sectors, such as commerce, transport, industry, agriculture, and residential [38]. Each sector was mandated to provide the policy planners with a breakdown of energy consumed in 2010 on cooling, heating, pumping, petrol, electricity, gas, and coal. They also collected figures on energy used from 1993 to 2010 as well as pro-jected figures from 2010 to 2050 [39]. Energy projections up to 2050 for all sectors were presented, as shown in Figure 5. The green shoot scenarios were exempted. In their estimations, energy demand will rise more steadily in all scenarios with time until 2030 and 2035 levels, which were presumed higher [41,42].
The numbers shown in Table 3 indicate a big increase in projected demands from 2015 to 2050. The outcome of Environmental Awareness (EA) is mostly identical to the Resource Constraint (RC) of the resources available. This is as a result of the ecological internalised cost of model treats moving at the same level of increase in price treats, regardless of the benefits gained from the reduced pollution. Table 3 further shows that the IEP planners were only interested in the three scenarios: implementation of existing policies, cost of fossil fuel for energy generation, and external cost on CO2 awareness, this is what we termed RC/EA scenarios [4].

Supply
The IEP's liquid fuel and electricity options for model supply after demand projections in each scenario involve installing new plants to replace the old ones in the power sector to increase energy supply. The process is expected to yield a considerable growth in energy generation capacity from about 50 GW in the base case to 165 GW between the 2015 and 2050. However, 120 GW will be recorded in RC and EA with green shoots value of 85 GW. By 2030, all scenarios are expected to sharply increase to 70 GW to reflect the projections in demand. The completion of Kusile and Medupi plants will see a major boost in energy production and perhaps create a surplus in capacity [23,46].  The programme organised by the independent power producers (IPPs) indicated that renewable energy is now preferable in terms of cost. International prices recently also confirm that RE prices are lower, and expected to come down more [47]. However, both IEP and IRP still rely on coal-fired generation even after Kusile and Medupi agreements. The IEP is, however, optimistic that South Africa still stands a chance of hitting an incomparable jackpot with coal or shale gas or both. The largest cost component of the entire energy system for 2014 to 2050 is imported fuel, but slightly cheaper than the current fuel and oil import cost [48][49][50][51].

Renewable energy and the role of IPPs
in the IEP South Africa has a relatively infant but growing RE industry. This industry is expected to increase the contribution of RE to a total of 18.2 GW by 2030, about 42% of the country's installed capacity. Table  4 shows the criteria given to the RE IPPss to produce RE for the country. The total capacity of bids received was 2127.66 MW, about 66.5% of preferred bidders. Twenty-eight bidders passed with the expectation of providing RE to the tune of 3 625 MW, representing 39% of the total energy mix [10,17]. It is interesting to note that all those details as indicated in Table 4, which were part of the previous policy, were not factored into the 2016 IEP framework.

Energy statistics classifications used in South Africa
The major stakeholders in South Africa's energy sector are the Department of Minerals and Energy (DME), Stats SA, and Eskom. DME and Stats SA depend on Eskom as their main source of electricity data [52]. The South African economy comprises five major sectors as classified by the DME [53]: Industrial, commercial, agricultural, residential and transport. The IEP covered all five sectors, with particular emphasis on the energy demand per sector. [4]. Details of current demand and future projections are given in Table 5. The table shows the industrial sector, which has eight sub-sectors, and is one of the three major consumers of energy. The biggest users of electricity in the commercial sector are machines used in offices. Urban and rural areas make up the residential sector. The main source of energy for the transport sector is liquid fuels. It is the second highest consumer of electricity in South Africa [4,[54][55][56][57][58].

Potential job creation
Constructional and, to a lesser degree, operational jobs are the two main work opportunities that the IEP can offer. Comparing this with the 33 000 workforce at Sasol and the 1.5 million job potential at a shale gas extraction firm within the same period [59]. Figure 6 shows a decline between 2040 and 2050. This is a period of methodology and modelling which only requires a skilled labour force. At this point, the engineers only rely on technical competence [59][60][61]. The new gas-to-liquid plant and shale gas exploitation were estimated to create 90 000 and 2 575 jobs respectively in the IEP by 2040, but they are no longer considered economically viable options [62,63]. Instead, technological developments such as electrification of transport, the use of hydrogen-based power in industry, electrical storage, and distributed energy generation are currently seen as economically viable options [35]. This has dramatically altered the framing of centralised planning, with particular emphasis on the evolution of demand modelling. The job potentials of the IEP were categorised as indicated in Table 6, which indicates the category of job creation, definitions, and types of jobs created.  Construction workers, bricklayers and plant operators.
2 Supplier jobs Jobs resulting from first-level suppliers during construction and/ or operation.
Turbine manufacturers, cement producers, and steel manufacturers.
3 Indirect jobs Jobs resulting further down the value chain during construction and/ or operation. i.e. suppliers to suppliers.
Iron ore miners and smelters 4 Induced jobs Jobs resulting from more money in the economy because of the project.
Restaurants, transportation services and medical facilities.

Permanent jobs
These jobs have a longer duration and are more permanent in nature. Services are usually established in-house within the organisation.
All operation jobs are considered to be permanent jobs. Estimated per unit of capacity installed.

6
Temporary jobs These are jobs that have relatively short duration. Services are usually contracted.
The base case again of Table 6 has permissible emission of power generation from 2020 to 2050 of 7 857 Mt. Additional 10 years will increase the emissions to about 10 400 Mt. With a permissible rate of 45% power generation will give PPD full period by putting emissions value at the upper limit of 4 o C by 2050 and more afterward. Emissions decrease from power generation in fosile fuel may lead to zero emissions in 2050 [49]. Thus, the emission proportion credited to the power sector must sharply reduce to the required target. The second scenario of DoE was implementation of renewable energy policy, which moved higher from 2020 to 2050, to 7.37 Gt from 5.09 Gt. These figures will bring the national emissions figures to 16.37 for the PPD's full period [65].
For the RE scenario, 8, 430 MW with 1.59 Gt emission is produced within the period of 2020 to 2050. Therefore, it seems that building the same amount within the same period of renewable's budget in 2020-2050 will produce an emissions value of 4.79 Gt. The implications are that PPD's full period will produce 7.07 Gt and, as a result, the national emissions figure will be 15.71Gt. But both renewables and gas should produce 6.43 Gt emission according to the least cost of CSIR for the full period. [66]. The 2016 IEP projections on CO2 reduction as compared to the South Africa and Paris agreement on renewable energy was a total departure in areas like transport electrification, modern electrical storage systems, application of hydrogen energy, generation transmission and distribution of energy and their impacts on various sectors of the economy. The 2012 CO2 emission was projected to reduce by 96% as compared to 40% in the 2016 IEP, by 2050m as stated in the Paris Agreement. A total decarbonised energy sector is critical for electrification trends in urban transportation system and residential housing in accordance with the Paris Agreement temperature limit. The 2016 IEP therefore should be revised to adopt these technologies [71].

Costs
The cost of energy systems is made up of different components from the primary energy supply to the energy delivered to the consumers [5,67]. The modules and the analysis for the five sensitivity costs are provided in Figure 7. The total cost covers 2015 to 2050 of the IEP. It includes imports of refined products, imports of crude oil, production of existing refineries, production and capital of new builds, and fuel for gas and coal. The total cost for the base case was estimated at R2793.70 bn. Figure 7 further reveals the green shoots scenario as having the highest cost for the entire project, at an estimated R3090.70bn. The cost of RE and CO2 emission reduction was not prominently featured in the discounted costs.

Observations and remarks
South Africa's energy supply is dominated by coal, which represents about 70% of the total installed capacity, while crude oil contributes about 22%. Natural gas, renewable energy and nuclear power, including biomass and hydro contribute only 9% of the installed capacity. The IEP did not add any new method of energy production pattern, but with a little on RES and CO2 reduction. The country aimed at reducing CO2 emissions to 40%, while maintaining coal-power generation as the main source of energy up to 2050. The major challenges facing the South African energy sector are: energy security assurance, CO2 emission reduction, and energy efficiency enhancement, which cannot be resolved by market activity alone. For proper delivery of service to the public, government intervention, in some cases through policies and directives, is needed to attain certain policy goals. Though several policies of government have in one way or another had a serious impact on the energy sector, some strategies have more considerable effect on energy policies that ought to be technologically advanced. Another important element that was identified through the IEP process was to safeguard alignment and recognise collaborations made among other governmental  strategies. Figure 8 shows a proposed method designed to help identify the various models and the scope of the IEP framework, by introducing the renewables and integrating them with the grid systems, thereby reducing reliance on fossil fuels. Figure 8 further illustrates the key models, such as the main objectives of the framework, key assumptions, and policy issues where renewable energy and energy efficiency were put in perspective. The measurable effects of CO2 emissions and the benefits of potential jobs to be created during the period as well as cost analyses are all presented in Figure 8.

Conclusion
The 2016 IEP framework of South Africa was designed with input from the various sectors of the South African economy and the 2016 IRP. South Africa's demand for energy renaissance and its legal commitment to total reduction of emission-producing energy by 2050 demands placing resource efficiency at the centre of a future industrial strategy on energy efficiency, modern storage systems and total utilisation of the RES available in the country. The primary energy supply in South Africa is dominated by coal-fired energy that represents about 70% of the total installed capacity and crude oil contributes about 22%. Natural gas, renewable energy and nuclear power, including biomass and hydro have a lesser role in the total energy mix, totalling 9%. However, global energy policy proposes a 50% dependence on renewable energy in order to reduce CO2 emissions, improve energy efficiency, and to support renewable en-ergy development. The poor performance in ecological sustainability is as a result of the energy sector's heavy dependence on coal-fired energy. This shows a shortfall with regard to the global energy policy standard. The IEP development should be a continuing process and should be reviewed from time to time, in order to keep abreast with the current changes in the macroeconomic settings, improvements in new technologies, and changes in national energy obligations. The IEA publication further emphasised modern storage systems and the implementation of hydrogen energy for transportation system to improve energy efficiency and economic benefits.

Author roles
K. Akom conducted the literature survey, and the writeup. T. Shongwe and M. Joseph (who conceptualised the study) supervised and guided on which literature to include, and read and corrected the manuscript.