نتایج جستجو برای: chinese solar greenhouse
تعداد نتایج: 287780 فیلتر نتایج به سال:
In greenhouse horticulture, energy costs form an increasingly larger part of the total production costs. Energy is primarily used for temperature control, reduction of air humidity, increase of light intensity and CO2 supply. Use of fossil energy can be reduced by limiting the energy demand of the system and decreasing energy losses, by intelligent climate control, by increasing the energy effi...
In order to improve the thermal insulation and storage performance of Chinese solar greenhouses in winter, a novel assembled greenhouse (ACSG) without energy supplement cold climatic areas was designed evaluate compare its with that conventional (CSG). The properties both were tested field on winter days Ningxia, China. results indicated land utilization rate ACSG 19.3% higher than CSG. On typi...
The purpose of this study was to determine and compare the performances of conventional and heat pump systems for cooling open and closed loop (confined) greenhouse systems. A dynamic simulation model was developed and validated to predict energy and mass exchanges in a greenhouse as a function of dynamic environmental factors. The model has options to evaluate the effects of location, time of ...
In this paper we discuss the role of solar electricity as well as the relative importance of concentrating solar power (CSP) and photovoltaics (PV) for reaching cost-optimal energy related greenhouse gas abatement under the constraint of a 2°C climate protection target. We use the hybrid energy-economy-climate model ReMIND to analyze the use of solar electricity to understand which parameters d...
For better understanding and forecasting of solar activity, high resolution observations for the Sun are needed. Therefore, the Chinese Large Solar Telescope (CLST) with a 1.8-m aperture is being built. The CLST is a classic Gregorian configuration telescope with an open structure, alt-azimuth mount, retractable dome, and a large mechanical de-rotator. The optical system with an all reflective ...
Forests play an important role in regulating the global climate by storing carbon that would otherwise be released as CO2 to the atmosphere, and affecting the global energy balance through absorption of solar radiation. Forests are also affected directly by the impact of increased CO2 levels and temperatures on ecosystem processes, and indirectly by human responses seeking to mitigate the net e...
Abstract Knowing crop evapotranspiration at any time is very important in management of irrigation systems for greenhouse. Changes in evapotranspiration during the crop growth period are described by crop coefficient (Kc), which is defined as the ratio between crop evapotranspiration and reference evapotranspiration. This study was conducted to determine the evapotranspiration of cucumber, tom...
The objective of this work was to study the effect of shading screens, normally used during the day for cooling purposes, on the night-time climate of unheated greenhouses. For this purpose, f irst a number of experimental measurements were taken during cold nights to characterise the greenhouse climate both with and without an aluminised external screen. Secondly a Computational Fluid Dynamic ...
Chinese-American composer Chen Yi has been praised as “the most internationally renowned female Asian composer of contemporary music today,” and she “has in particular become a prominent figure in music circles in the United States and China.” Besides her successes in writing orchestral and chamber music, Chen Yi has also written numerous vocal compositions including some art songs. This docume...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید