According to international forecasts, global demand for air-conditioning is projected to triple over the next 30 years, with most of this demand emanating from developing countries. Meeting this demand will be expensive, according to the “Cooling our World” study released by Strategy& Middle East, part of the PwC network. To keep costs under control, the study recommends deploying district cooling where appropriate in developing countries as this could lead to over US$1 trillion in energy savings worldwide through 2035.
Among the factors for this rise in demand are higher population growth, greater household disposable income, higher living standards and rapid urbanization. The growth of urban areas, in particular, leads to “heat islands” that are much warmer than surrounding rural areas because appliances and machinery generate heat when used and increase the local temperature. Although international forecasts anticipate that improvements in the energy efficiency of traditional cooling technologies can prevent unsustainable electricity demand, the volume of additional demand may simply be too great, which is why developing countries should consider district cooling.
According to the Strategy& Middle East report, district cooling is an efficient means of providing cooling in appropriate areas. District cooling aggregates demand and uses the most energy efficient technology to cool high-density developments, whilst using less energy than even the most efficient stand-alone systems.
Speaking about the benefits of district cooling, George Sarraf, Partner and Managing Director of Strategy& Middle East, said: “Gulf Cooperation Council (GCC) countries have been early adopters of district cooling, and can be the benchmark for other countries. We estimate that worldwide, increased adoption of district cooling could reduce energy consumption by up to 5,000 terawatt-hours over the next 16 years, representing $1 trillion in cost savings by 2035, assuming that energy prices are $0.20 per kilowatt-hour. This is a significant reduction and builds the case for using district cooling because it is energy efficient method and cost effective.”
District cooling systems consume 20 to 30 percent less power than the most efficient conventional cooling solution, and 60 to 80 percent less power than the average conventional cooling system. Additionally, district cooling can reduce peak power capacity by up to 30 percent on average (with an additional 20 percent reduction that can be unlocked through thermal energy storage).
“A key advantage of district cooling comes from aggregating demand, ideally among multiple buildings that combine residential and commercial spaces. The result is a higher cooling density — a measure of the maximum amount of energy required to cool a specific area, directly related to the population density and the type of occupied space in the area to be cooled. As cooling density grows, the unit cost of district cooling decreases, while the cost of conventional technologies remains relatively flat,” said Christopher Decker, Senior Executive Advisor, Strategy& Middle East.
Interestingly, the penetration rates of both district cooling and stand-alone air or water chillers are higher in GCC countries than in the rest of the world, representing 15 percent to 25 percent of the total installed cooling capacity in the region. This high adoption rate stems from two factors: recent real estate development, and the need to minimize the cooling load during the hot summer days, when cooling load could represent up to 70 percent of peak electricity demand in some countries. Furthermore, Strategy& Middle East forecasts of urban plans show that district cooling is feasible in about 40 percent of new-build communities. The percentage is even higher for the mega-developments in GCC countries, which are ideal candidates for district cooling.
Strategy& Middle East outlines the environmental and real estate benefits of district cooling, which include:
Building a regulatory framework for District Cooling
“Governments play a critical role in the adoption of district cooling, because it requires significant planning to aggregate demand, protect customers, and ensure that the economic benefits are equally distributed along the value chain. Governments need to develop a holistic regulatory framework, similar to those for electricity and water utilities, as this will address the commercial, legal and technical aspects of district cooling”, said Dr. Raed Kombargi, Partner, Strategy& Middle East.
“The six part regulatory framework is vital because the necessary aggregation of demand, protection of customers, securing of the significant capital required, management of financial and demand risks, and surmounting of other challenges will not happen through an unregulated market,” he added.
Based on the experience of GCC countries, Strategy& Middle East has developed a six-part regulatory framework, will all six elements to be implemented simultaneously:
“As developing countries worldwide face growing demand for comfort cooling, merely improving the energy efficiency of the existing solution will probably not suffice. Developing countries need to increase the adoption of district cooling at a national level. To ensure that this occurs to the maximum possible extent, these countries should emulate GCC countries by drafting and implementing district cooling policies,” concluded Jad Moussalli, Principal with Strategy& Middle East.