Greenhouse heating

In this work, a UV absorber compound (E)-2-(((4-(benzyloxy)phenyl)imino)methyl)phenol was synthesized by microwave method using a two steps protocol. In the first step, α-(4-hydroxyphenylimino)-o-cresol (1) was synthesized from 4-aminophenol and salicylaldehyde by circulating under microwave heating at 60 oC for 8 minutes, the reaction yield reached 82.91 %.

9p vijaychest 24-04-2024 5 2   Download

Continued part 1, part 2 of ebook "Commercial energy auditing reference handbook (3rd edition)" provides readers with contents including: general information; mechanical systems; motors and electrical information; combustion equipment and systems; compressed air; fan and pump drives; lighting; envelope information; domestic water heating; weather data; pollution and greenhouse gases; formulas and conversions; water efficiency; using feedback for energy management;...

725p mocthanhdao0210 20-11-2023 7 4   Download

Continued part 1, part 2 of ebook "How to build your own greenhouse: Designs and plans to meet your growing needs" provides readers with contents including: Chapter 8 - The foundation; Chapter 9 - Building techniques; Chapter 10 - Wiring, plumbing, and heating, systems design and installation; Chapter 11 - Greenhouse accessories; Chapter 12 - Greenhouse maintenance; Chapter 13 - Greenhouse plans;...

147p dangsovu 20-10-2023 5 5   Download

This study aims to design the optimum heat pipe heat exchanger (HPHE) to recover heat from flue gas of boiler for increasing the temperature of feed water. The optimum thermosyphon heat exchanger sizing was simulated on the basis of thermo-economical method and simulation program was construct by using the MATLAB 2021b.

8p viisac 15-09-2023 3 2   Download

In this study, 4E (energy, exergy, exergoeconomic, and exergoenvironmental) analysis of an underfloor heating system integrated with the geothermal heat pump of a greenhouse with a usage area of 90 m2 has been made. When the results of the 4E analysis applied to the system and its elements were examined, the energy efficiency of the heating system in the winter months has been determined to be 77.85% and the exergy efficiency 30.61%.

19p lyhuyenthu 31-01-2023 7 2   Download

This study found out the patterns of urban heat islands in Hanoi: the heat islands are concentrated as large zones in the high construction density urbans, which are also developed of economy and urbanization; Line forms in suburban areas with medium construction density - where planning is in progress and scatters in the low construction density areas - the slower economic development and urbanization.

12p viwmotors 13-12-2022 8 2   Download

This research explores whether Environmental Management Accounting can be applied to assist an Australian cogeneration company in improving both its financial performance as well as its environmental performance. Cogeneration or ‘combined heat and power’, in this particular case, involves the simultaneous production of heat and electricity using a single fuel, that is, natural gas. The heat generated is then used to produce steam to meet the customers’ requirements as well as boost the production of electricity.

247p runordie3 06-07-2022 7 3   Download

Geothermal energy constitutes an important renewable resource in Turkey that has been extensively utilized for heating buildings, power generation, greenhouse farming and various other industries. One of the most remarkable geothermal locations in Turkey is the low-enthalpy area of Afyon, where five main low-temperature (30–110℃) geothermal fields are exploited. However, further exploration drilling sites have proven inconclusive, casting doubts on the effective presence of high-temperature geothermal systems in the region.

15p tanmocphong 29-01-2022 8 1   Download

This study has been prepared in accordance with the objectives of evaluating and developing geothermal resources in order to bring the geothermal resources in the Konya Plain Project (KOP) Region, which includes Aksaray, Kırşehir, Konya, Nevşehir, Niğde and Yozgat provinces, to the country’s economy with maximum capacity, and to develop proposals for investments to be made. The number of overnight stays and the number of tourists outside the region should be increased by utilizing alternative tourism opportunities in the region.

24p tanmocphong 29-01-2022 10 1   Download

Low-cost activated carbon (AC) samples obtained from waste coffee grounds were used for CO2 and CH4 adsorption. ACs were prepared by chemical activation and carbonized at three different temperatures. AC carbonized at 800◦C showed a relatively high surface area (582.92 m2 g−1) and high adsorption capacities of 2.6 mmol g−1 and 1.1 mmol g−1 at 25◦C for CO2 and CH4, respectively. Adsorbent samples were prepared by loading of Fe3+ metal ions onto ACs and their adsorption capacities were compared with those of nonloaded ACs.

15p tudichquannguyet 29-11-2021 7 1   Download

Microclimate of green houses is important for better plant growth and greater yield. The dynamic behavior of the greenhouse microclimate is a combination of physical processes involving energy transfer and mass balance. The greenhouse microclimate can be manipulated by control actions, such as heating, ventilation, carbon dioxide enrichment to provide appropriate environmental conditions for crops. These modifications imply the additional use of energy in the production process.

13p kethamoi6 29-06-2020 22 1   Download

Preservation of fruits, vegetables, and food are essential for keeping them for a long time without further deterioration in the quality of the product. Solar drying has been used since time immemorial to dry plants, seeds, fruits, meat, fish, wood, and other agricultural, forest products. The aim of the dryer is mainly for the welfare of the marginalized and poor farmers those who can’t afford hi-tech facilities and equipment’s to preserve their agricultural products. Drying of Safed Musli (Chlorophypum boribilianum) in open sun drying require more time and affected its quality.

15p nguaconbaynhay6 24-06-2020 16 1   Download

Thermoelectrics (TE) is well-known as a non-smoke technology for electricity production from waste heat and for greenhouse effect reduction. Enhancing power factor (PF = S 2 , where S is Seebeck coefficient and  is electrical conductivity) and figure of merit of TE materials to achieve high-performance TE devices has attracted much scientific attention. Doping foreign elements into host bulk structure is a basic and traditional solution to modify the thermoelectric properties of materials. In this work, we use small amount of 0.5 at.

6p nguyenminhlong19 22-04-2020 18 0   Download

The objective of the present study was to evaluate the effects of thermal screens made of clear polyethylene (PE) and polyester material on the microclimate and overall heat loss coefficient in plastic tunnel greenhouses. The dimensions of the plastic tunnels were: width 6 m, length 20 m and height 3 m.

12p masterbarista 14-01-2019 19 1   Download

In Mediterranean countries generally greenhouses are not regularly heated at optimal levels. Fruity vegetables in winter have a problem of insufficient pollination due to low temperatures and isolated atmosphere.

10p masterbarista 14-01-2019 10 1   Download

This study investigated emissions of CH4, N2O and NH3 from nine anaerobic digestion plants that treat biowaste. The treatment is in form of mechanical pre-treatment, anaerobic digestion followed by a composting with or without intensive aeration. The exhaust gases from the mechanical and anaerobic steps are treated by biofilters.

8p cumeo3000 01-08-2018 21 0   Download

The atmosphere of Earth is a layer of gases surrounding the planet Earth that is retained by Earth's gravity. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night (the diurnal temperature variation).

81p lumia_12 28-05-2013 58 11   Download

Almost all motorized transportation today involves the combustion of fossil fuels, which produces energy to be transformed into motion. This combustion is the reaction of the hydrogen and carbon present in the fuels with oxygen in the air to produce–in the ideal world–water vapour (H2O) and carbon dioxide (CO2). Neither of these products is damaging to human health.

44p saimatkhauroi 01-02-2013 41 3   Download

Historical analyses also reveal wide- spread disasters, social disruption and disease outbreaks in response to the more acute, inter-annual, quasi-periodic ENSO (El Niño Southern Oscillation) cycle (1). The depletion of soil fertility and freshwater supplies, and the mismanage- ment of water catchment basins via excessive deforestation, also have con- tributed to the decline of various regional populations over the millennia (2). Today, climate scientists predict that humankind’s increasing emission of greenhouse gases will induce a long-term change in the world’s climate.

52p quygia123 01-11-2012 57 0   Download

Information about climate1 is used to make decisions every day. From farmers deciding which crops to plant next season to mayors in large cities deciding how to prepare for future heat waves, and from an insurance company assessing future flood risks to a national security planner assessing future conflict risks from the impacts of drought, users of climate information span a vast array of sectors in both the public and private spheres. Each of these communities has different needs for climate data, with different time horizons (see Box 1) and different tolerances for uncertainty...

253p taurus23 27-09-2012 68 11   Download