Integration of Geothermal Heating Technologies into Agricultural Structures: A Smart Greenhouse Approach

The escalating global climate crisis driven by global warming, wars, mass migration movements, and rapid population growth has emerged as a fundamental threat to humanity’ssecure access to food. This process not only exerts increasing pressure on agricultural production systems but also poses a serious risk to the sustainable use of natural resources. According to the United Nations’ World Population Prospects report, the global population is projected to reach 8.6 billion by 2030, 9.8 billion by 2050, and exceed 11.2 billion by 2100 [1]. This upward trend necessitates a re-evaluation of existing production and consumption models, the strengthening of food security policies, and the adoption of more sustainable approaches to natural resource management.

In Turkey, greenhouse cultivation stands out as a significant agricultural production area that reduces seasonal dependency and enhances crop diversity. The total area of greenhouse farming across the country amounts to 776,110 decares, of which 7.2% consists of glass greenhouses (55,949 da), 58.4% of plastic greenhouses (452,907 da), 13.4% of high tunnels (103,978 da), and 21% of low tunnels (163,276 da) [2].

The Food and Agriculture Organization (FAO) of the United Nations projects that by 2050, the global population will reach approximately 9.1 billion, emphasizing that such demographic growth will exacerbate global challenges related to food access and adequate nutrition. According to FAO, mitigating the adverse effects of this trend requires countries to develop holistic, sustainable, and inclusive food policies. The organization further indicates that global food demand is expected to increase by more than 60% by 2050, necessitating a significant expansion of agricultural production capacity and food supply [3], [4]. These projections clearly demonstrate that the agricultural sector must not only increase production volumes but also enhance the efficiency, environmental sustainability, and energy performance of production processes. In this context, the effective utilization of geothermal energy resources in agricultural production particularly in greenhouse cultivation and rural heating applications emerges as a sustainable alternative solution. Geothermal energy holds strategic importance for the future of agricultural production systems due to its potential to reduce dependence on fossil fuels, lower production costs, and minimize carbon emissions. Consequently, achieving food security and addressing the climate crisis successfully depend on the integrated adoption of innovative agricultural technologies, climate-friendly production methods, and renewable energy sources such as geothermal energy within the agricultural sector.

Greenhouse cultivation, while being one of the most effective methods for maximizing agricultural productivity by increasing yield per unit area, is also considered one of the most energy-intensive subsectors within agricultural production systems due to its high energy demand, investment costs, and operational expenses [5]. In modern greenhouse enterprises, where environmental conditions are artificially controlled, energy consumption can account for up to 78% of total production costs. A substantial portion of this consumption approximately 65-85% of the primary energy requirement is directed toward heating and cooling processes aimed at maintaining the optimal temperature and humidity balance of the plant growth environment [6]. This situation underscores the importance of renewable energy solutions that enhance energy efficiency for the sustainability of greenhouse operations. In this context, the utilization of geothermal energy resources for heating in greenhouse cultivation presents a critical alternative that reduces dependence on fossil fuels while contributing to both economic and environmental sustainability.

With technological advancements, recent years have witnessed the increasing adoption of smart greenhouses characterized by enhanced energy efficiency, high levels of automation, and precise monitoring of environmental parameters [7]. These new-generation greenhouse systems, through optimized control mechanisms, not only reduce energy consumption but also improve product quality and productivity. Smart greenhouses provide controlled agricultural production environments that ensure sustainable cultivation throughout the year by integrating sensor-based climate management, automated irrigation, and nutrient dosing systems.

These developments, in contrast to traditional greenhouse cultivation, highlight the growing importance of innovative approaches such as digital monitoring, data-driven decision-making, and renewable energy integration in production processes. In this context, smart greenhouse systems integrated with geothermal energy represent an innovative engineering approach that enhances energy efficiency in agricultural production, minimizes environmental impacts, and strengthens climate change adaptation capacity. The integration of Turkey’shigh geothermal potential with digitally monitored and automated greenhouse infrastructures is considered a strategic necessity for developing sustainable agricultural production models, enhancing food security, and promoting rural development. Through these systems, environmental variables can be monitored in real time, production processes can be managed through automation-based operations, and decision-making mechanisms can be executed more rapidly and with higher accuracy. For instance, in smart greenhouse systems integrated with sensor technologies, climate parameters such as temperature, humidity, light intensity, and carbon dioxide (CO₂) concentration are continuously monitored. Based on the analysis of the collected data, climate control systems are dynamically adjusted to ensure optimal growing conditions.