scholarly journals Development and Experimental Results of a Thermal Oil Based Roasting System for Decentralized Processing of Groundnuts

2019 ◽  
Vol 9 (20) ◽  
pp. 4342
Author(s):  
Ali Raza ◽  
Faizan Majeed ◽  
Anjum Munir ◽  
Oliver Hensel
Keyword(s):  
Working Hours ◽  
Maximum Energy ◽  
Payback Period ◽  
Heat Energy ◽  
Energy Utilization ◽  
Aluminum Surface ◽  
Direct Normal Irradiance ◽  
Oil Flow ◽  
Thermal Oil ◽  
Light Medium

The current research has been conducted to investigate the capacity of an indigenously developed thermal oil based continuous solar roaster (CSR) for groundnuts roasting. A 10 m2 standing Scheffler fixed focus concentrator is used to target the incoming direct normal irradiance at casted aluminum surface of a heat receiver which transfers this heat energy to the roasting unit by means of thermal oil circulation. The roasting unit comprises a cylindrical shell (2000 mm in length and 450 mm in diameter) attached beneath a semi-circular oil flow jacket and equipped with a ribbon type screw conveyer with 6 mm thick paddles. Optimizing for maximum energy utilization and feeding capacity using response surface methodology, roasting time for light, medium and dark quality was found to be 14 + 0.1, 20 + 0.1 and 29 + 0.1 min respectively. In terms of roasting quality, CSR has shown quite satisfactory results. The study revealed that continuous solar roaster has the capability to roast 140 to 288 kg groundnuts per day subjected to dark to light roasting quality with average direct normal irradiance ranging from 650–800 Wm−2. The overall thermal efficiency of the system was found to be 37.8%. The payback period of CSR was estimated to be 2450–5250 useful working hours.

Recovering waste energy of the combined gas turbine system using paraffin melting

2020 ◽  
Vol 14 (4) ◽  
pp. 7481-7497
Author(s):  
Yousef Najjar ◽  
Abdelrahman Irbai
Keyword(s):  
Melting Process ◽  
Payback Period ◽  
Energy Utilization ◽  
Raw Material ◽  
Heat Transfer Fluid ◽  
Layered System ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Power Cycle ◽  
Waste Energy

This work covers waste energy utilization of the combined power cycle by using it in the candle raw material (paraffin) melting process and an economic study for this process. After a partial utilization of the burned fuel energy in a real bottoming steam power generation, the exhaust gas contains 0.033 of the initially burned energy. This tail energy with about 128 ºC is partly driven in the heat exchanger of the paraffin melting system. Ansys-Fluent Software was used to study the paraffin wax melting process by using a layered system that utilizes an increased interface area between the heat transfer fluid (HTF) and the phase change material (PCM) to improve the paraffin melting process. The results indicate that using 47.35 kg/s, which is 5% of the entire exhaust gas (881.33 kg/s) from the exit of the combined power cycle, would be enough for producing 1100 tons per month, which corresponds to the production quantity by real candle's factories. Also, 63% of the LPG cost will be saved, and the payback period of the melting system is 2.4 years. Moreover, as the exhaust gas temperature increases, the consumed power and the payback period will decrease.

scholarly journals Waste heat energy utilization in refrigeration and air-conditioning

2018 ◽  
Vol 402 ◽  
pp. 012060
Author(s):  
Raman Kumar Singh ◽  
Saif Nawaz Ahmad ◽  
Neeraj Priyadarshi ◽  
Md Obaidur Rahman ◽  
A K Bhoi
Keyword(s):  
Air Conditioning ◽  
Waste Heat ◽  
Heat Energy ◽  
Energy Utilization

A Study on the Optimal Configuration Based on Heat Energy Utilization of Yellow Phosphorus Tail Gas in Fine Phosphorous Chemical Enterprises

2014 ◽  
Vol 955-959 ◽  
pp. 2721-2726 ◽  
Author(s):  
Xu Qing Liu ◽  
Shi Bin Xia ◽  
Zhong Li Cai ◽  
Da Yin Liu
Keyword(s):  
Heat Source ◽  
Chemical Plant ◽  
Heat Energy ◽  
Optimal Configuration ◽  
Energy Utilization ◽  
Comprehensive Utilization ◽  
Yellow Phosphorus ◽  
Chemical Products ◽  
Technical Measures

By analyzing the feasibility of comprehensive utilization method of yellow phosphorus tail gas after desulfurized, the author of this article found only the method of heat energy utilization is technically more mature, practical and feasible. Taking a chemical plant in some Chemical co., LTD in Hubei for example, this article demonstrates that the complete and comprehensive utilization of yellow phosphorus tail gas could be achieved once various technical measures are planned as a whole and their configuration are optimized. The technical measures include replacing coal-fired boiler, using as polymerization heat source in fine phosphate production, stoving the materials of yellow phosphorus and burning chemical products and so on. Finally, this article put forward principles and requirements of the optimal configuration based on heat energy utilization of yellow phosphorus tail gas in fine phosphorous chemical enterprises.

Comprehensive Method of Energy Efficiency of Residential House

2014 ◽  
Vol 953-954 ◽  
pp. 1570-1577 ◽  
Author(s):  
Taisia Olegovna Zadvinskaya ◽  
Alexandr Sergeevich Gorshkov
Keyword(s):  
Energy Efficiency ◽  
Residential Building ◽  
Payback Period ◽  
Heat Energy ◽  
Domestic Heating ◽  
Comprehensive Method ◽  
Extra Charge ◽  
Heat Metering ◽  
Residential House ◽  
Heating Plant

The article describes a method of increasing the efficiency of heat energy. The method is based on installation of heat metering system and automatic controlled domestic heating plant in residential building. An example of comparative calculation of the heat input and estimation for heat energy in a typical residential building, according to different methods which are used for the calculation of extra charge by the energy supplier, in the presence of the heat metering system and automatic controlled domestic heating plant and without. Calculated payback period of the proposed activities.

scholarly journals The solar systems payback effect of the price decrease of communal electric prices and of the interest rate decrease of the Central Bank

2014 ◽  
Vol 3 (2) ◽  
pp. 467-473
Author(s):  
Henrik Zsiborács ◽  
Gábor Pintér ◽  
Béla Pályi
Keyword(s):  
Interest Rate ◽  
Solar Energy ◽  
Central Bank ◽  
Power Plants ◽  
Payback Period ◽  
Electricity Price ◽  
Energy Utilization ◽  
Solar Pv ◽  
Pv System ◽  
Solar Systems

The energy is one of the most important needs of the humanity. One of its biggest challenge or danger is that the world's demand for energy continues to grow. The aim of present study is to review the introduction of solar energy utilization, the economic determination of the return of crystalline solar photovoltaic systems in Hungary, the electricity price reductions for individuals and the change in the payback period. The effect of the changing investment cost to the payback period based on the changes in electricity price reductions and in central bank interest rate is written in this study. An important question is for a household: decide by or against a solar (PV) system. The main direction of our recent research is the utilization of photovoltaic (PV) solar energy with crystalline solar systems. The research was carried out in solar-electric power plants extended from 1.5 kWp to 10 kWp. The calculation of payback time was performed by dynamic indices.

Research on heat energy utilization parameters of city reclaimed water

2014 ◽  
Author(s):  
Yuan Yu ◽  
Jia Zheng ◽  
Yuanlin Zou ◽  
Hailiang Lin ◽  
Hao Yu
Keyword(s):  
Reclaimed Water ◽  
Heat Energy ◽  
Energy Utilization

scholarly journals An Energy Conserving and Transmission Radius Adaptive Scheme to Optimize Performance of Energy Harvesting Sensor Networks

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2885 ◽  
Author(s):  
Xin Ju ◽  
Wei Liu ◽  
Chengyuan Zhang ◽  
Anfeng Liu ◽  
Tian Wang ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Sensor Networks ◽  
Energy Harvesting ◽  
Network Performance ◽  
Maximum Energy ◽  
Energy Utilization ◽  
Utilization Rate ◽  
Cost Of Energy ◽  
Energy Conserving ◽  
The Cost

In energy harvesting wireless sensor networks (EHWSNs), the energy tension of the network can be relieved by obtaining the energy from the surrounding environment, but the cost on hardware cannot be ignored. Therefore, how to minimize the cost of energy harvesting hardware to reduce the network deployment cost, and further optimize the network performance, is still a challenging issue in EHWSNs. In this paper, an energy conserving and transmission radius adaptive (ECTRA) scheme is proposed to reduce the cost and optimize the performance of solar-based EHWSNs. There are two main innovations of the ECTRA scheme. Firstly, an energy conserving approach is proposed to conserve energy and avoid outage for the nodes in hotspots, which are the bottleneck of the whole network. The novelty of this scheme is adaptively rotating the transmission radius. In this way, the nodes with maximum energy consumption are rotated, balancing energy consumption between nodes and reducing the maximum energy consumption in the network. Therefore, the battery storage capacity of nodes and the cost on hardware. Secondly, the ECTRA scheme selects a larger transmission radius for rotation when the node can absorb enough energy from the surroundings. The advantages of using this method are: (a) reducing the energy consumption of nodes in near-sink areas, thereby reducing the maximum energy consumption and allowing the node of the hotspot area to conserve energy, in order to prevent the node from outage. Hence, the network deployment costs can be further reduced; (b) reducing the network delay. When a larger transmission radius is used to transmit data in the network, fewer hops are needed by data packet to the sink. After the theoretical analyses, the results show the following advantages compared with traditional method. Firstly, the ECTRA scheme can effectively reduce deployment costs by 29.58% without effecting the network performance as shown in experiment analysis; Secondly, the ECTRA scheme can effectively reduce network data transmission delay by 44–71%; Thirdly, the ECTRA scheme shows a better balance in energy consumption and the maximum energy consumption is reduced by 27.89%; And lastly, the energy utilization rate is effectively improved by 30.09–55.48%.

Use of Engine Waste Heat Energy Utilization Rate of Engine is Improved

2013 ◽  
Vol 273 ◽  
pp. 129-132
Author(s):  
Feng Liang Jun ◽  
Feng Guo Bin
Keyword(s):  
Energy Saving ◽  
Waste Heat ◽  
Heat Energy ◽  
Energy Utilization ◽  
Utilization Rate ◽  
Fuel Price ◽  
Energy Saving Technology ◽  
Utilization Ratio ◽  
Save Energy

Based on the fuel price rises ceaselessly, energy-saving technology has been paid more and more attention by people. In order to improve engine energy utilization ratio and save energy, this article research how to use the engine waste heat to generate electricity and warm oneself.

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