Pre-Heating Storage Design of Solar Heating System Based on SVM

2011 ◽  
Vol 320 ◽  
pp. 548-552
Author(s):  
Zhi Duan Cai ◽  
Wu Ming He ◽  
Pei Liang Wang ◽  
Shou Jiang Cai
Keyword(s):  
Large Scale ◽  
Heating System ◽  
Control Model ◽  
Solar Heating ◽  
Continuous Heating ◽  
Application Process ◽  
Start Time ◽  
Heating Systems ◽  
Storage Model ◽  
Heating Model

The heating model of pre-heating storage in advance during the valley period of electricity is proposed to solve the intermittent heating problem brought by large solar heating systems affected by change in climate and day and night or other factors. Aiming at best energy saving and the capability of continues heating of solar heating system, the SVM is applied to predict the start time, the highest temperature, the volume of water and other key parameters of the model. The solar heating system apply the pre-heating storage control model that has been trained to meet the practical requirements of different consumers and climate in the application process. Experimental results show that the pre-heating storage model can improve the energy efficiency of large solar heating system and the capacity of real-time continuous heating. The article provides a new control model with large-scale solar heating system.

Design of Solar Tracker Based on Square Structure and Camera Device

2014 ◽  
Vol 672-674 ◽  
pp. 105-108
Author(s):  
Yan Liu ◽  
Jian Liu ◽  
Ying Wei Song ◽  
De Wei Zhao ◽  
Lin Zhao ◽  
...  
Keyword(s):  
Heating System ◽  
Solar Heating ◽  
The Sun ◽  
Photovoltaic Generation ◽  
Heating Systems ◽  
Solar Tracker

Solar tracker is an important part of photovoltaic generation and solar heating system. By solar tracker, the efficiency of solar utility can be significantly improved. Considering the camera device is widely applied in the photovoltaic generation and solar heating systems, based on the visual motoring equipment, a kind of solar tracker is designed. Using the proposed solar tracker, the height and the angle of the sun can be detected and be applied in solar tracker controller. Experiments show this design has relatively high accurate rate during a week’s period while the weather are partly cloudy or clear. It shows good application future in photovoltaic generation and solar heating industries.

scholarly journals Appropriate Sizing of Solar Heating Systems

1983 ◽  
Vol 105 (1) ◽  
pp. 66-72
Author(s):  
P. Bendt
Keyword(s):  
Life Cycle Cost ◽  
Minimum Cost ◽  
Heating System ◽  
Limited Range ◽  
Solar Heating ◽  
Economic Optimization ◽  
Heating Systems ◽  
Solar Systems ◽  
Solar Fraction ◽  
Economic Trends

It is generally assumed that a solar heating system should be sized by minimizing its life-cycle cost. This study shows, however, that the uncertainty in future economic trends makes the results of such a procedure questionable. The design conditions for minimum cost are extremely broad and all practical systems have a solar fraction within the limited range of 30 to 90 percent. Thus, by choosing only three collector areas that give systems within this range, one is assured of selecting a nearly optimal system for any realistic economic scenario. Selecting one of these three systems is essentially equivalent to economic optimization, but simpler. Procedures are derived in this paper for determining the sizes of the three systems. The conclusion is that the collector areas should be about 1/8, 1/5, and 1/3 of the building floor area. This rule of thumb eliminates the need to design solar systems individually, allowing the possiblity of mass-produced homes with standardized solar heating systems.

Inexpensive Performance Monitoring of Solar Domestic Water Heating Systems

1988 ◽  
Vol 110 (3) ◽  
pp. 187-191 ◽  
Author(s):  
A. M. Clausing
Keyword(s):  
System Performance ◽  
Performance Monitoring ◽  
Heating System ◽  
Solar Heating ◽  
Performance Parameters ◽  
Water Heating ◽  
Domestic Water ◽  
Heating Systems ◽  
Solar Fraction ◽  
The Cost

Performance monitoring is essential in order to conclusively demonstrate the cost effectiveness of a solar heating system. Unfortunately, this “last step” is an aspect which has received little engineering consideration. The monitoring programs in progress typically use instrumentation which is much too expensive and complex for use by individual operators of domestic water heating systems. Hence, few systems are monitored, and the average owner knows little about the performance characteristics of his system. Even malfunctions go undetected. An inexpensive performance monitoring system is described in this paper. It could probably be mass-produced for under 15 dollars or built by the typical homeowner for under 30 dollars. The monitor indicates the instantaneous solar fraction. Overall system performance can be improved with this monitor, since it enables the user to correlate load with the availability of solar heated water. Methodology, performance parameters, and some performance data are presented.

scholarly journals Comparing the economics of electric and water underfloor heating

2021 ◽  
Vol 11 (1) ◽  
pp. 15-23
Author(s):  
Egor P. Bazunov ◽  
◽  
Valery Yu. Kravchuk
Keyword(s):  
Positive Impact ◽  
Heating System ◽  
Heat Emission ◽  
Continuous Heating ◽  
Heating Systems ◽  
Floor Area ◽  
Heated Floor ◽  
Research Findings ◽  
Domestic Design ◽  
Pipeline Design

Introduction. Using underfloor heating to maintain warm temperature inside manned rooms is a widely spread international practice. Domestic design organizations also take advantage of this solution, as it makes a positive impact on the indoor microclimate and thermal comfort. Underfloor heating outperforms traditional heating systems in terms of particular operational characteristics. The application of underfloor heating is a relevant issue, addressed by numerous publications, however, researchers tend to focus on the heat emission capacity of floors that have different constructions. The goal of this research is to analyze the economics of electric and water underfloor heating systems. Materials and methods. The aggregate cost method is employed to perform the economic analysis of underfloor heating systems. The co-authors have calculated capital and operating expenses, broken down by the years. The co-authors compare electric and water underfloor heating systems installed in the rooms having the floor area of 5, 10, and 20 sq. meters. The rooms are located in Moscow. Indoor heat losses are considered to be linearly dependent on the heated floor area. Results. The co-authors have calculated capital and operating expenses incurred in the above rooms. They have also drawn an aggregate heating cost graph for three rooms having two types of heating systems installed. The costs are broken down by the years. Conclusions. Although the research findings describe individual cases, they can serve as the basis for a general conclusion that the payback period of an underfloor heating system depends on the heated floor area and that electric underfloor heating systems are better for small rooms. Further studies can focus on alternative pipeline design systems, different power consumption modes of the pump depending on the circuit length, and non-continuous heating systems.

scholarly journals Towards the Valorization of Biomass to 5-Hydroxymethylfurfural: A Promising Biochemical and Biofuel Feedstock

KIMIKA ◽  
2019 ◽  
Vol 30 (1) ◽  
pp. 4-12
Author(s):  
Rey Joseph J. Ganado ◽  
Francisco, Jr. C. Franco
Keyword(s):  
Lignocellulosic Biomass ◽  
Large Scale ◽  
Heating System ◽  
Building Blocks ◽  
Scale Production ◽  
Catalytic Systems ◽  
Biomass Valorization ◽  
Heating Systems ◽  
Large Scale Production ◽  
Renewable Feedstock

The increasing oil demand and exhaustion of reserves have initiated stimulus to search for new and sustainable sources of fuels and fine chemicals. Lignocellulosic biomass turned out to be a promising and renewable feedstock for these applications. 5-hydroxymethylfurfural (HMF) is one of the most promising building blocks for bio-based chemicals that can be derived from lignocellulosic biomass which can be potentially applied for large scale production. However, one of the main factors holding its transition is the need for sustainable, green and financially feasible processes. This review provides the studies made towards catalytic systems used for HMF production, as well as the various solvents and heating system applied. Research efforts to unravel the interactions among catalysts, solvents, and heating systems are encouraged, thereby engineering a synergistic conversion system for biomass valorization.

A REVIEW OF LARGE-SCALE SOLAR HEATING SYSTEMS IN EUROPE

Solar Energy ◽  
1998 ◽  
Vol 63 (6) ◽  
pp. 355-366 ◽  
Author(s):  
M.N Fisch ◽  
M Guigas ◽  
J.O Dalenbäck
Keyword(s):  
Large Scale ◽  
Solar Heating ◽  
Heating Systems

Exergy Analysis of a Solar Heating System

1995 ◽  
Vol 117 (3) ◽  
pp. 249-251 ◽  
Author(s):  
Geng Liu ◽  
Y. A. Cengel ◽  
R. H. Turner
Keyword(s):  
Exergy Analysis ◽  
Energy Analysis ◽  
Second Law Of Thermodynamics ◽  
Heating System ◽  
Solar Heating ◽  
Second Law ◽  
Exergy Destruction ◽  
Thermal Systems ◽  
Heating Systems ◽  
Second Law Analysis

Exergy destruction associated with the operation of a solar heating system is evaluated numerically via an exergy cascade. As expected, exergy destruction is dominated by heat transfer across temperature differences. An energy analysis is also given for comparison of exergy cascade to energy cascade. Efficiencies based on both the first law and second law of thermodynamics are calculated for a number of components and for the system. The results show that high first-law efficiency does not mean high second-law efficiency. Therefore, the second-law analysis has been proven to be a more powerful tool in identifying the site losses. The procedure used to determine total exergy destruction and second law efficiency can be used in a conceptual design and parametric study to evaluate the performance of other solar heating systems and other thermal systems.

An Optimal Standard for Solar Heating Systems

1979 ◽  
Vol 101 (2) ◽  
pp. 138-149 ◽  
Author(s):  
D. M. Auslander ◽  
M. Tomizuka ◽  
H. Lee
Keyword(s):  
Optimal Control ◽  
Lower Bound ◽  
Optimal Control Problem ◽  
Control Problem ◽  
Temperature Regulation ◽  
Minimum Temperature ◽  
Heating System ◽  
Solar Heating ◽  
Control Problems ◽  
Heating Systems

Control problems in solar heating systems are studied. Using a load temperature regulation specification based on minimum temperature, an optimal control problem is formulated to compute a lower bound on the amount of auxiliary energy needed, over a given cycle, for a fixed solar heating system. In order to estimate the sophistication of control necessary for achieving higher performance, a comparative study is made among several simple controllers with both proportional and on-off actuation.

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