Resumen: In the present context of energy transition towards a carbon neutral society, residential sector plays an important role to combat climate change since it represents about 40% of the global final energy consumption and 30% of direct CO2eq emissions in the European Union. Polygeneration systems, facilitating the integration of renewable energies, are a feasible alternative enabling efficient use of natural resources with low environmental impact. This work analyzes the economic viability, in terms of net present value (NPV), and environmental benefit (CO2eq emissions) of an energy supplier company playing the role of an aggregator for both demand and supply. As an owner of a polygeneration system, optimally designed through a MILP approach, it delivers various energy services (electricity, space heating, domestic hot water and cold) to several customers (50 dwellings). The analysis is performed, considering three different business models, in two different locations, Zaragoza (Spain) and Marseille (France), with different energy demands, energy mixes and energy regulations. The optimal configuration obtained, consisting of cogeneration module, PV, reversible heat pump, boiler and thermal energy storage has shown to be very resilient and cost-effective in the scenarios analyzed. Results indicate that the proposed scheme represents an added value for both the supplier company (aggregator), with a positive, and the final customers (owing savings greater than 30%), with significant reduction of CO2eq emissions. Idioma: Inglés DOI: 10.1016/j.energy.2023.127019 Año: 2023 Publicado en: Energy 272 (2023), 127019 [21 pp.] ISSN: 0360-5442 Factor impacto JCR: 9.0 (2023) Categ. JCR: THERMODYNAMICS rank: 3 / 78 = 0.038 (2023) - Q1 - T1 Categ. JCR: ENERGY & FUELS rank: 24 / 171 = 0.14 (2023) - Q1 - T1 Factor impacto CITESCORE: 15.3 - Pollution (Q1) - Renewable Energy, Sustainability and the Environment (Q1) - Modeling and Simulation (Q1) - Management, Monitoring, Policy and Law (Q1) - Civil and Structural Engineering (Q1) - Industrial and Manufacturing Engineering (Q1) - Energy (all) (Q1) - Electrical and Electronic Engineering (Q1) - Mechanical Engineering (Q1) - Energy Engineering and Power Technology (Q1) - Fuel Technology (Q1) - Building and Construction (Q1)