Application of Swimming Pool Heating with Solar Energy     

HUANG Lin chao  YOU Quan  TIAN Sheng yuan 《保鲜与加工》2002,(8):96-99

Solar energy sourcei s regenerative source,reasonable use of it is an effective way to solve the problem of exiguousness of the traditional energy. But the usage of the solar energy is limited. To achieve the satisfactory effect, we must use a reasonable system style combined with the traditional energy. Through the application of swimming pool heating with solar energy. It is pointed out that more attention should be puid to reason dispose the collectors,store up heating tank,assistant thermal resource and dependable auto control. Solar energy can take place of the traditional energy, it is obviously that the solar energy can save the money and the energy and protect the environment.  相似文献   

穿流引风组合加热式蔬菜脱水机的改进设计     

孙延鹏  孙传祝 《农产品加工．学刊》2007,(12):83-87

现有平流组合加热式蔬菜脱水机存在热交换不充分和干燥速度慢等问题。对现有设备进行了穿流组合加热技术改造:将送风管和引风管连接管的直径自上而下依次减小,满足了各层干燥箱对送风量和引风量的不同要求;采用冲孔板制造输送链板,满足了穿流供风的要求;采用供风管变截面供风技术,提高了供风的均匀性。设备改造后,分别对胡萝卜和甘蓝两种蔬菜进行了脱水干燥对比试验。结果表明,采用穿流组合加热时,不仅干燥速度快,而且其平均单位脱水的能耗分别由平流组合加热的7.03,7.29MJ/kg下降为6.83,6.65MJ/kg。  相似文献   

农村住宅采暖技术试验研究          下载免费PDF全文

罗振涛  娄炳刚  师连生  范国锋 《农业工程学报》1991,7(3):75-80

本文叙述了以太阳能采暖房为主体,利用连炕节柴灶余热作热源、吊炕为散热器的农村住宅采暖技术,它比仅靠太阳能采暖,室温提高3.49℃,12℃的采暖保证率达到90.33％。文中同时给出了该种采暖型式的热工参数设计模型和建筑结构模型。可供其它多种太阳能一常规能源综合采暖参考。  相似文献   

微型冷库复合加热循环除霜系统的研制与试验     

赵松松  杨昭  陈爱强  张娜  陈明锋  刘兴华 《农业工程学报》2015,31(2):306-311

针对冷冻冷藏库传统除霜方法高能耗、冷库温湿度波动大等缺陷,通过设计系统除霜结构,完善控制策略,研发了一种智能除霜方法。复合加热循环除霜采用时间—压差联合智能控制策略界定最佳除霜点,配备排管辅助制冷技术,基于欧姆龙PLC高精度控制系统使各设备协同完成除霜过程。对复合加热循环除霜系统进行试验研究,对比分析不同除霜方法的工作性能及能耗情况。结果显示:相比于传统电加热除霜,复合加热循环除霜过程冷库温度波动减小3.8℃,相对湿度波动降低21.1百分点,除霜时间缩短14 min,系统除霜节能率达34.5%。  相似文献   

Effect of heating treatments on nitrogen mineralization from sewage sludge     

Kaori MATSUOKA  Naoki MORITSUKA  Tsugiyuki MASUNAGA  Kensuke MATSUI  Toshiyuki WAKATSUKI 《Soil Science and Plant Nutrition》2006,52(4):519-527

  相似文献   

含颗粒液态食品通电加热研究动态   总被引：3，自引：0，他引：3       下载免费PDF全文

周亚军  殷涌光  刘微  姚婷 《农业工程学报》2004,20(1):26-29

通过对国内外含颗粒液态食品通电加热研究分析,介绍了含颗粒液态食品通电加热的原理和加工特性,总结出影响通电加热食品品质的因素,概述了通电加热技术在含颗粒食品中的研究动态,阐述了含颗粒食品通电加热中数学模型的应用现状,指出含颗粒液态食品通电加热研究中存在的问题,为今后研究及发展趋势提出了建议.对进一步深入研究含颗粒液态食品通电加热的加工特性、影响因子及其应用具有参考价值和指导意义.  相似文献   

Effects of charcoal production on maize yield,chemical properties and texture of soil   总被引：4，自引：0，他引：4  

Philip?G.?OguntundeEmail author  Matthias?Fosu  Ayodele?E.?Ajayi  Nick?van de?Giesen 《Biology and Fertility of Soils》2004,39(4):295-299

The effects of charcoal production on soil textural and chemical properties were investigated in Ejura, Ghana. The aim was to study the effects of heating and charcoal residue on maize yield, soil texture and soil chemical properties. Composite samples were taken from the 0–10 cm layer of soil at charcoal-making sites and from adjacent fields (control). Twelve sites were randomly selected for the study across the range of the Kotokosu watershed. Maize was planted in four selected locations on charcoal site soils (CSS) and adjacent field soils (AFS) to assess the impact of charcoal production on crop yield. There was a significant increase in soil pH, base saturation, electrical conductivity, exchangeable Ca, Mg, K, Na and available P in the soil at the kiln sites as compared to the adjacent soils. A relative change of up to 329% was observed in K while organic C and total N decreased by 9.8% and 12.8%, respectively. Organic C and total N were highly correlated ( P <0.01) and both parameters significantly ( P <0.05) depended on clay minerals in the soils. Soil texture was also modified with a significantly higher sand content and lower clay fraction in the CSS. The grain and biomass yield of maize increased by 91% and 44%, respectively, on CSS as compared to AFS. Further research to ascertain the long-term effects of charcoal production on the soil environment and the fertility of tropical soils is needed.  相似文献   

欧姆加热过程中苹果浆的电导率及VC降解规律研究     

郭芳  赵武奇  尹贻童  夏鑫淼 《农产品加工．学刊》2011,(6):26-30

研究了苹果浆的欧姆加热规律及VC的降解动力学,考察了温度和果浆含量对电导率的影响以及电场强度、果浆含量对加热速率的影响。结果表明,苹果浆的电导率随温度的升高而增大,且呈线性关系;随着果浆含量的增加,电导率和加热速率都在增加;随着电场强度的增大,加热速率增加。苹果浆中VC对热不稳定,苹果浆中VC降解符合动力学一级反应,得到的苹果浆中VC的预测模型,经验证与实测值拟合较好,表明该模型是合理的。  相似文献   

Heat Transfer Performance of Capillary Mats Using Wet Construction in Winter     

YANG Jie  ZHOU Hui xin  ZHANG Xu  LIU Yan  WANG Jun 《保鲜与加工》2011,(2):80-85

For the capillary mats using wet construction, a winter experiment designed to investigate the heat transfer performance was described, and the heat transfer performance analysis which contains the comparisons between different pipe space and different thickness of cement mortar surface was carried out. As a result, compared with that of the traditional radiant heating pipes, the capillary mats of wet construction require supply water with lower temperature, and it shows good heat transfer performance and system energy efficiency as well. According to the demand of indoor heat dissipation and human comfort as well as the coupling relationship between the temperature of supply water and surface construction thickness, it is suggested that the proper construction method should be comprehensively considered in practical applications.  相似文献   

Heating performance analysis of multi-nozzle water-jet steam ejector     

TONG Ming wei  CAI Qin  BAI Xiu juan 《保鲜与加工》2011,(6):60-63

Abstract:This paper developes a heating coefficient model to study the heating performance of multi-nozzle water-jet steam ejector. It analyzes the factors of heating performance, and explores the relationships between the heating performance and different operating parameters theoretically and experimentally. The results show that the heating performance of multi-nozzle water-jet steam ejector is very good. The heating coefficient decreases with the increase of the inlet water temperature, and increases with the increase of the steam pressure and ejecting coefficient. The relationships between heating performance of ejector and different operating parameters by calculation and experiment are in good agreement.  相似文献