Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. IX
Written by Georgi KOMITOV, Violeta RASHEVA, Georgi VALTCHEV
Increasing energy efficiency and reducing greenhouse gases is a central issue in the European energy strategy. The challenge of significantly reducing in primary energy consumption is great. It can only be achieved if we all work together and share good experiences and practices. Vegetables are undoubtedly one of the healthiest foods with high energy content. They are rich in amino acids, easily digestible sugars, enzymes, minerals, vitamins, chlorophyll, organic water and other nutrients. Therefore, the production of fresh vegetables is a vital necessity, even in winter. Naturally, winter production of vegetables requires that they be grown in heated greenhouses. Energy costs for greenhouse heating and ventilation form a significant share of their total production costs. The purpose of this paper is to identify the incoming and outgoing energy flows from a glass greenhouse for vegetables production and to propose a methodology for defining the energy for the greenhouse heating while providing the necessary parameters of the environment for fresh vegetables growing.
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