Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados CIGR Journal (2) Autor Nimmermark, Sven (2) Maslak, Katarzyna (1) Palavra-chave Greenhouses (2) Agricultural Engineering Thermal energy use (1) Energy (1) Measurements (1) Modelling (1) Ornamental plants (1) Tomatoes (1) Wind speed (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2015 (1) 2014 (1) País China (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Thermal energy use in three Swedish greenhouses – the outdoor temperature-dependent variation and the influence of wind speed under no-sunlight conditions CIGR Journal Maslak, Katarzyna; Nimmermark, Sven. Thermal energy is used in greenhouses for the temperature and humidity control.  In the North of Europe, energy expenditures have a significant share in the total greenhouse production cost.  A study was performed to quantify and analyze the use of thermal energy in three Swedish commercial greenhouses (two with tomatoes and one with ornamental plants), to test the hypothesis that substantial amounts of heat are used at higher outdoor temperatures, and to investigate the influence of the wind speed on the energy use under no-sunlight conditions.  Hourly climate data were registered by means of Priva control systems.  The use of thermal energy was computed based on the readings from the flowmeters and the temperature of the inlet/outlet water to/from the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural Engineering Thermal energy use; Greenhouses; Tomatoes; Ornamental plants; Wind speed. Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2923 Measured Energy use in a Greenhouse with Tomatoes Compared to Predicted use by a Mechanistic Model Including Transpiration CIGR Journal Nimmermark, Sven. In regions with a colder climate the use of heat energy for climatization of greenhouses can be significant. Beside outdoor temperatures and climate also transpiration affects the use of heat energy since heating and ventilation or dehumidification may be required in order to keep the humidity in the greenhouse below levels which may lead to plant diseases. A reliable model is a powerful tool to predict energy use for greenhouse cultivation. Thus, a mechanistic model including transpiration and energy use for dehumidification and hourly output data was developed from an older simpler model. To be reliable, modelled data must fit with real data. The aim of the present study is to compare measured and modelled use of heat energy. Thus, energy use for a... Tipo: Info:eu-repo/semantics/article Palavras-chave: Greenhouses; Energy; Measurements; Modelling. Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3100 Registros recuperados: 2 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco