Heat and mass transfer in spacer-filled direct contact membrane distillation were experimentally investigated explained more detail based on the combination of thin film theory boundary layer theory.Experimental results used to calculate coefficient through instead existing Sherwood number correlations or modeling results.Consequently, change (DCMD) performance terms fluxes, temperature polarization (TPC), concentration (CPC) could be analyzed clearly fluctuation layer, thickness.Moreover,...

This study investigates the comparison of mechanical properties wheat and rice straw such as shear strength, specific shearing energy cutting forces. The experiments were conducted at three loading rate 15, 20 25 mm min -1 internode positions 70 (N1), 130 (N2) 190 (N3) down from ear. Results show that by increasing rate, strength changed 8.12 to 22.94 6.06 14.33 MPa was varied 12.10 18.64 10.40 16.17 mJ -2 , respectively. Moreover, values forces within ranges 13.23 19.50 9.40 16.70 N....

Energy aspects and cost analysis in DCMD using different commercial PTFE membranes are experimentally examined under the impact of operating conditions membrane pore sizes.Regarding energy efficiency (EE), gain output ratio (GOR), specific consumption (SEC), feed inlet temperature is most influential factor comparison to concentration volume flow rate.Regarding size, system a larger had lower per cubic meter freshwater production than smaller membrane.

Abstract This paper presents an experimental investigation of heat transfer in direct contact membrane distillation (DCMD) flow channels with and without the spacer. In this experiment, usual hydrophobic DCMD is replaced by a copper plate to eliminate mass transfer. The study shows most appropriate correlations for empty channel cases different heights rates. For case spacer channels, two materials are investigated: nonwoven plastic woven stainless steel. correlation both these materials....

A knowledge-based fuzzy logic model was developed on experimental data and used to predict the draft, side vertical forces soil disturbance area by disc tillage tool operation. The laboratory research work conducted evaluate performance of at three working speeds (1.25 m/s, 1.98 m/s 2.47 respectively) depths (0-5 cm, 5-10 cm 10-15 paddy under soil-bin environment. Further, draft (Fx), (Fz) (Fy) were assessed predicted towards depths. prediction with two input variables (speed depth) four...

An experiment was conducted to determine the vertical stiffness and damping characteristics of tractor tires for aim simulation design suspension system. Three kinds were selected measure coefficient by using Free-Vibration Logarithm Decay Method at five levels tire inflation pressures two loads. The results show that, all tire, linearly increased increasing pressure whereas decreased when increased. also depend on size, structure as front or rear tire. Additionally, shows trend while...

The mass transfer mechanism within commercial PTFE membrane with various nominal pore sizes in spacer-filled direct contact distillation (DCMD) was determined. Mass fluxes and permeability (MP) values for each were experimentally measured. MP increased insignificantly 2.3% 4% when the inlet temperature at feed side rose from 400C to 500C different sizes. All investigated models except Dusty Gas model good enough simulate inside smaller (0.22 µm, 0.45 µm). Compared combined diffusion model,...

Wheat (Triticum aestivum) is the most important staple crop with a demand-based need to ensure food security but faces challenges of timely harvesting at maturity. Harvesting operation wheat one major activities during production and for sustainability. The study's main purpose investigate impact vehicle speed on grain losses operation. Varied speeds combine harvester were observed field tests measured by using designed sampling method. observation recorded that normal working in range 7.54...

Plant health and biomass relies on nutrient availability the efficiency with which nutrients are taking in by plants.Vesicular Arbuscular Mycorrhiza (VAM) is a symbiotic association between plant roots fungus.VAM improve growth modifying its rhizosphere soil helps uptake plants.Our aim was to evaluate of maize (Zea mays) quantify mycorrhizae under different textures phosphorous deficient soils.Treatments include types texture (pure soil, pure sand 1:1 soil+sand) along recommended rate...

Extreme hydrological events such as tsunamis, high tides, or storm surges seriously threaten coastal communities. These result in flooding, property damage, loss of life, and long-term economic social impacts. Therefore, monitoring detecting extreme significantly affect areas disaster response efforts. However, the cost installing maintaining these stations can be a significant challenge for developing countries. The objective this study is to use low-cost GNSS receiver monitor tides detect...

This study aims to clarify the salinization degree of irrigation water in Quang Dien and Phu Vang districts Winter-Spring crop season propose a potential technology treat saline on lab-scale. The majority was brackish (70%) at Phuoc, Loi, villages with concentration up nearly 7.1‰. For Thai An villages, is much lower when percentage from 30% 40%. Direct contact membrane distillation (DCMD) implemented 20‰ - 40‰ concentrations water. experimental results revealed that freshwater production by...

A knowledge-based fuzzy logic model was developed on experimental data and used to predict the draft, side vertical forces soil disturbance area by disc tillage tool operation. The laboratory research work conducted evaluate performance of at three working speeds (1.25 m/s, 1.98 m/s 2.47 respectively) depths (0-5 cm, 5-10 cm 10-15 paddy under soil-bin environment. Further, draft (Fx), (Fz) (Fy) were assessed predicted towards depths. prediction with two input variables (speed depth) four...

This paper presents the results of study vertically natural frequency tractor tires are effected by changing different ground contacts and inflation pressures using Free Decay Method. The show that the natural frequencies tire not affected while vertical acceleration increased strongly due to increase pressure when performs free decay vibration on rigid ground. In addition, number peaks also increases with increasing pressure. On other hand, decreases slightly as soft soil. Further,...

Tóm tắt: Một máy kéo nhỏ (CF200) của Trung quốc được chọn là đối tượng mô phỏng. Hệ phương trình vi phân dao động hình ½ xe thiết lập. Sử dụng các thông số hệ độ cứng, cản giảm chấn thống lốp - đất, hàm mấp mặt đồng và cấu tạo đã xác định từ trước. Ứng phần mềm Matlab/Simulink để tích đặc tính thay đổi tần tự nhiên thăm dò làm việc trên ruộng lúa với sự 3 mức tốc tiến 5 áp suất kéo. Kết quả phỏng cho thấy rằng dãi 2.47-2.83 Hz chuyển theo Z 2.77-3.18 quay quanh trục Y tại vị trí trọng tâm...

Determination of accurate paddy field surface profile has great importance to designing the tractor suspension system. With this aim, a new test rig been designed and developed measure profiles using static level method (sampled interval 200mm). The data were analyzed through Matlab/Simulink software obtain power spectral densities (0.05-3.5c/m) measured on log-log scale it was found that amplitude variation density (PSD) at low spatial frequency higher than high whereas undulation PSD curve...

Thiết bị sấy năng lượng mặt trời kiểu đối lưu tự nhiên dùng để thóc có kết cấu đơn giản, dễ sử dụng và giá thành thấp, phù hợp với quy mô hộ nông dân, thể vật liệu sẵn ở địa phương chế tạo. Khi thiết này, thời gian rút ngắn nhiều so phơi nắng khi trong cùng một điều kiện như nhau, đảm bảo số chất của sấy, không các côn trùng chim chuột thâm nhập phá hoại, phòng ngừa được mưa ẩm. này cũng sản phẩm nghiệp khác.