The city of Salamanca is preparing for a profound change in how it produces and consumes thermal energy. The Regional Government of Castile and León, through the Public Infrastructure and Environment Company (SOMACYL), has begun preliminary work to deploy a sustainable heating network based on forest biomass which aspires to become a key part of the regional energy strategy.
This strategic project will combine Economic savings for users, reduction of polluting emissions and job creation, with an infrastructure designed to serve thousands of homes and public and private buildings in the city of Salamanca. Although physical construction has not yet begun, the technical definition phase is already underway and will set the pace for the following stages.
A large-scale project for the city of Salamanca
The future district heating network of Salamanca is conceived as a benchmark infrastructure in Spain, with a estimated total investment of 35 million euros, co-financed with European FEDER 2021-2027 funds. The design anticipates that the network will be able to supply heating and domestic hot water to approximately 8.900 homes and 75 buildings in the service sector, among which are included educational, health and administrative facilities.
The goal is to replace numerous individual heating systems with one more efficient and cleaner centralized solutionThis will allow users to reduce their energy bills and avoid the cost of replacing or maintaining their own boilers. The Regional Government presents this initiative as a clear commitment to an energy model with a lower environmental impact, but also as a way to ease the financial burden on residents in the medium and long term.
The overall infrastructure design has included a thermal power plant The plant, with a capacity of up to 48 megawatts (MW), is located on Mariano RodrÃguez Sánchez Avenue, from where heat will be distributed through an urban network of underground pipes. This configuration will allow access to different neighborhoods and areas of the city, progressively connecting new communities and buildings.
The network layout will be deployed around approximately 50 kilometers of pipesThe project is divided into three main sectors that will be developed in phases. Each sector will be incorporated into the system as the civil engineering and connection work progresses, with the aim of adding consumers without having to wait for the complete project.
Sector 1: the start in the university and healthcare environment
The first concrete step towards making Salamanca's heating network a reality is the drafting of the construction project for the pipelines of the so-called Sector 1SOMACYL has promoted these technical works with a base budget of 198.800 euros plus VAT, an investment intended to precisely define the layout, characteristics and construction details of the pipes and initial connections.
This Sector 1 is destined to be the initial core of the deployment of a biomass-fueled heating networkThis project will serve the university campus, the hospital complex, and various public and private buildings in the surrounding area. These are areas with high thermal demand and intensive use of heating and hot water, making this first phase crucial for demonstrating the system's technical and economic viability.
At this stage, the execution of large-scale visible works is not yet contemplated, but the engineering work is fundamental: the following must be determined: pipe diameters, connection points, materials and coordination with other existing urban infrastructure. This detailed planning will minimize surface impacts when the construction phase begins.
At the same time, the basic project of the renewable generation plant which will supply thermal energy to the entire network. This work has been awarded for 68.900 euros plus VAT and includes the design of the main biomass plant, as well as the definition of the equipment and systems necessary to operate safely and efficiently.
Biomass power plant: technology and emissions control
The heart of the network will be a Forest biomass thermal power plant of up to 48 MWThe facility will be located on Mariano RodrÃguez Sánchez Avenue. It will be equipped with moving grate boilers, a well-established technology in the biomass sector that facilitates stable combustion and efficient fuel use.
To ensure that the plant complies with the more demanding environmental standardsThe design incorporates advanced gas purification systems, including multicyclone units and electrostatic precipitators. These technologies allow for the retention of particles and minimize emissions into the atmosphere, aligning the project with European air quality regulations.
The main fuel will be forest biomass from sustainable harvestingThis implies orderly forest management and a reduction in fire risk, as well as converting waste or byproducts into energy resources. Because it is a renewable source, the COâ‚‚ emissions balance throughout its life cycle is much lower than that of conventional fossil fuels.
The plant will be equipped with control and monitoring systems that will allow adjust heat production to the actual demandThis intelligent management optimizes performance and detects potential issues early. It is key to maintaining service stability, preventing energy waste, and ensuring continuous operation during periods of peak heating demand, such as winter.
A 50-kilometer urban network in three sectors
Heat distribution will be achieved through a urban network of approximately 50 kilometers of buried pipelines, designed to transport hot water from the biomass plant to the exchange substations of each connected building or group of buildings.
The system will be organized into three major sectorsThese phases will be developed progressively. The first will focus on the university and healthcare environment; subsequent phases will extend the service to other neighborhoods with more users of the service sector, as the works progress and agreements to join the network are finalized.
The pipes will be properly insulated for reduce heat losses During heat transfer, one of the technical aspects that most influences the overall efficiency of this type of network, the installation of valves, inspection chambers, and distributed control systems is planned to facilitate maintenance and daily operation.
Each building will be connected via a interchange substationwhere heat from the mains is transferred to the building's internal circuit without mixing the water from both systems. In this way, users maintain their internal heating and hot water system, but no longer depend on individual or room boilers fueled by fossil fuels.
Energy, environmental and social impact
One of the project's strengths is its contribution to the reduction of polluting emissions in SalamancaTechnical estimates indicate that, once fully operational, the heating network will prevent approximately 39.000 tons of COâ‚‚ per yearby replacing fossil fuels such as diesel or natural gas with renewable biomass.
This decrease in emissions translates into a improvement of air quality This project directly contributes to the energy transition and climate change mitigation goals set by the European Union and national and regional governments. It also aligns with the urban decarbonization strategies being implemented in many European cities.
From an economic and social point of view, the Salamanca district heating network is emerging as a driving force of activity for the city and the rural environmentDuring the construction phase, approximately 70 direct jobs are expected to be created, related to civil works, equipment assembly, and associated tasks. Once operational, the system will require around 20 permanent positions for operation and maintenance.
To these jobs we must add around 120 jobs linked to biomass supplyprimarily in forestry operations, fuel preparation, and logistics. This rural component reinforces the project's territorial dimension by generating economic opportunities in less active areas and promoting more active forest management.
Planned schedule and current status of the works
Currently, the performance is in a key phase of drafting projects and environmental studiesOn the one hand, the technical definition of the pipelines in Sector 1 is progressing; on the other hand, the basic project for the generation plant is being developed and the environmental analyses required by the regulations are being carried out.
The planning of the Junta de Castilla y León foresees that the works of the biomass plant and the pipeline network will be carried out in successive phasesso that different sections can be connected in stages. The timeframe set by the regional government places the commissioning of Salamanca's district heating network around the year 2028provided that the technical, administrative and financing deadlines are met.
Until that date arrives, it will be necessary to complete the environmental processing, the tendering of construction contracts and equipment supplyas well as coordinating with potential users to formalize their incorporation into the system. This process is usually gradual, as homeowners' associations and entities in the service sector study the economic and technical conditions before taking the final step.
Despite the ambitious timeline, the progress of Salamanca's district heating network is part of a broader plan. broader regional strategy for renewable heat networks which has been running for more than a decade in Castilla y León, providing prior experience and concrete references from similar projects already in operation.
Context: renewable heating networks in Castile and León
The Salamanca initiative didn't start from scratch. For over ten years, the Regional Government of Castile and León, through SOMACYL, has been promoting biomass-based heating networks in different locations within the community. Currently, the count is 19 networks in operationwhich together have an installed renewable power of 99 MW.
These infrastructures accumulate around 91 kilometers of pipes These projects represent an investment of approximately 85 million euros. Thanks to them, thermal energy is supplied to 4.517 homes, 147 commercial buildings, and 9 industrial users, significantly reducing fossil fuel consumption in these areas.
Among the most notable projects are those such as the University of Valladolid heat network, the industrial network of the Villalonquéjar industrial park in Burgos or the Valladolid West network, which serve as an example of the potential of these energy solutions in both urban and industrial environments.
Looking to the future, SOMACYL plans to invest close to 135 million euros in new projects and expansions Over the next few years, the goal is to reach an installed renewable capacity of 230 MW by 2030 and extend the pipeline network to approximately 182 kilometers. Salamanca is thus integrated into a regional roadmap that is firmly committed to renewable district heating networks as a tool for moving towards an energy model less dependent on fossil fuels.
With all these elements on the table, Salamanca's sustainable district heating network is emerging as one of the city's most important energy initiatives in the coming decades: a large-scale infrastructure that combines biomass, efficiency, emissions reduction and job creation, and which is based on the experience accumulated by Castilla y León in the development of renewable heat networks in other parts of the community.
