scholarly journals Is it reasonable for the same city to advocate a policy of reducing heating temperature by the same amount?

2021 ◽  
Vol 233 ◽  
pp. 01143
Author(s):  
Shiqian Wang ◽  
Enshen Long ◽  
Ning Mao
Keyword(s):  
Energy Saving ◽  
Heating Temperature ◽  
Thermal Characteristics ◽  
Relative Energy ◽  
Office Building ◽  
Saving Ratio ◽  
The Government ◽  
Saving Effect ◽  
Saving Measure ◽  
New Buildings

Reducing heating temperature is a universally recognized energy saving measure. However, the same city has buildings completed in different years and with different functional USES at the same time. It is an important issue worth discussing whether it is reasonable for the government to advocate reducing heating temperature by the same range. Based on DOE medium-sized office building as the object, using the Beijing meteorological database system, the thermal characteristics of four envelopment structures representing different completion years, the annual heating energy saving and relative energy saving ratio when the set indoor heating temperature is reduced by the same range are studied. The results show that the worse the thermal performance of the envelope is, the greater the annual heating energy is when the heating setting temperature drops by the same extent. It indicates that the older the building is, the better heating energy saving effect and more heating cost can be achieved by advocating lowering the heating setting temperature of the same range. For the annual relative energy saving ratio, the older buildings with worse envelope structure are slightly higher, while the new buildings with better envelope structure are slightly lower, but they are similar on the whole. It is proved that the policy of reducing heating temperature by the same range in the same city is reasonable for achieving similar energy saving ratio.

scholarly journals Is the heating energy saving effect by lowering the temperature setpoint similar in different functional buildings?

2020 ◽  
Vol 198 ◽  
pp. 03005
Author(s):  
Yuxin Huang ◽  
Shurui Guo ◽  
Zhu Cheng ◽  
Ning Mao ◽  
Enshen long
Keyword(s):  
Energy Saving ◽  
Air Temperature ◽  
Heating Temperature ◽  
Relative Energy ◽  
Comprehensive Analysis ◽  
Outdoor Air ◽  
Time Perspectives ◽  
Absolute Energy ◽  
Saving Effect ◽  
Saving Measure

It is known that reducing the temperature setpoint is an effective heating energy saving measure for all kinds of buildings. This study focuses on the heating demand saving effect of the same buildings for different functional uses based on the same climatic background (Beijing) and the same reduction in the heating setpoint. Through comprehensive analysis of the absolute energy saving amount (ESA) and the relative energy saving ratio (ESR) from different time perspectives, the heating energy saving mechanism in reducing the heating temperature is discussed. Two types of completely different heating saving mechanisms were found: (1) the behavioural energy saving (BES) was dominated by those heating hours in which the outdoor air temperature or indoor integrated temperature was in the reducing range of heating setpoint, and(2) the energy saving of the temperature difference (ESTD) is dominated the rest heating hours. When the buildings were used for different functions, the annual ESA was determined by the numbers of the above two types of heating hours, and the annual heating ESR was mainly determined by the heating hours when the heating demand was large.

Energy Consumption Analysis on Office Building Ventilation

2012 ◽  
Vol 516-517 ◽  
pp. 1139-1143
Author(s):  
Ke Chun Sun ◽  
Wei Jun Zhang
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Air Conditioning ◽  
Room Temperature ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Energy Simulation ◽  
Office Building ◽  
Saving Effect ◽  
Night Ventilation

Chongqing weather conditions as the representative, energy simulation software DesT-c Chongqing office building energy simulation analysis, simulated natural building under different ventilation conditions at room temperature, the energy consumption of building cooling load and air-conditioning system changes, with an emphasis on energy-saving effect of the night ventilation; The study showed that in Chongqing reasonable use of ventilation reduce building natural room temperature to a certain extent; Sensitive indicators of building air conditioning energy consumption than the heating energy consumption of ventilation was significantly; Night ventilation when the number of ventilators is less than 5 times / h, the energy saving effect is very significant.

Comparative Test Research on Different Type Energy-Saving Pumping Unit

2008 ◽  
Author(s):  
Zhao Guo ◽  
Gao Yu
Keyword(s):  
Energy Saving ◽  
Production Costs ◽  
System Efficiency ◽  
Saving Ratio ◽  
Pumping Unit ◽  
Comparative Results ◽  
Electricity Saving ◽  
Saving Effect ◽  
Pumping Units ◽  
Lifting Equipment

Beam pumping unit is the uppermost artificial lifting equipment in the oilfield exploitation. In order to reduce its energy consumption and to cut down the oil production costs, many manufacturers have developed a lot of types of the energy-saving pumping unit. With different energy-saving principle, the energy-saving effects are quite different. It is becoming very important how to justly and reasonably evaluate the energy-saving effect of a pumping unit. Hydrodynamic simulated experiment well is used to compare the energy-saving effects of four types of pumping units. In the process of the experiments, water is taken as the medium, offset pumping unit is as the reference body, system efficiency and electricity-saving ratio is as the evaluating goal and all the experiments are executed at the same condition. The relative curves of the lifting height with the system efficiency and the electricity-saving ratio are drawn for the four types of the pumping units. Testing results indicate that the double horse-head pumping unit has the best effect, and then the compound-balanced pumping unit with downward beam balance weight. According to the comparative results, it is put forward the pumping unit selecting suggestions.

Potential and Economic Analysis of Office Building Energy Saving Reconstruction in Sunan Region

2013 ◽  
Vol 361-363 ◽  
pp. 422-426
Author(s):  
Xiao Ping Feng ◽  
Zhi Heng Jiang ◽  
Yu Han
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Building Energy ◽  
Economic Benefits ◽  
Office Building ◽  
Existing Buildings ◽  
Polyurethane Composite ◽  
Building Energy Saving ◽  
Indoor Comfort ◽  
New Buildings

with the vigorous development of construction in our country, the proportion of the building energy consumption in total is increasing step by step, especially the 1980s existing buildings, the vast majority of them failing to take any insulation measures, the energy consumption of them is several times or even ten times to new buildings, therefore, in recent years, energy saving reconstructions of existing buildings have paid more and more attention. This paper takes a typical office building which was built in sunan region as an example, using some external thermal insulation materials such as rigid polyurethane foam plastics, polyurethane composite board and energy saving design software BECS to imitate energy saving reconstruction. Besides, the economy of each scheme of energy saving reconstruction was also analyzed. The results show that, energy saving reconstruction can greatly reduce the energy consumption of existing buildings, and bring good economic benefits, at the same time, it also can improve indoor comfort and working conditions, and can generate significant social benefits.

scholarly journals Simulation and experimental verification of energy saving effect of passive preheating natural ventilation double skin façade

2020 ◽  
pp. 014459872095628 ◽  
Author(s):  
Keming Hou ◽  
Shanshan Li ◽  
Haining Wang
Keyword(s):  
Energy Saving ◽  
Natural Ventilation ◽  
Structural Parameters ◽  
Building Energy ◽  
Cold Season ◽  
Green Energy ◽  
Office Building ◽  
Double Skin ◽  
Building Energy Saving ◽  
Saving Effect

In recent years, energy efficiency and energy saving strategies have become priorities for energy policy in most countries, and green energy saving buildings has attracted more attention in the worldwide. The use of passive energy saving natural ventilation strategy can improve the effect of building energy saving and improve the internal microenvironment of the building. This paper introduces and analyzes the passive preheating natural ventilation double skin facade (DSF) comprehensively. The influence of the structural parameters of the double skin facade in cold season ventilation on the preheating ventilation effect is discussed on the basis of the discussion and experiment of an actual double skin facade office building. Further, the energy-saving effect of the passive preheating natural ventilation double skin facade is simulated and verified. The effect of structural parameters of DSF in cold season on the thermal performance is summarized. These corresponding results could provide some reference for the buildings in the similar climate regions.

scholarly journals The Influence on Daylight and Energy Consumption of Expanded Metal Mesh Applied on Building Façades

2019 ◽  
Vol 111 ◽  
pp. 03049
Author(s):  
TSAY Yaw-Shyan ◽  
YANG Chih-Hung
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Window Glass ◽  
Office Building ◽  
Design Solution ◽  
Perforation Rate ◽  
Metal Mesh ◽  
Expanded Metal ◽  
Saving Effect ◽  
The Impact

Expanded metal mesh has become widely used as a shading element in the façade of many buildings in recent years, and its energy saving performance has been evaluated in tropical/subtropical countries. However, expanded metal mesh reduces solar radiation while also reducing the natural daylight entering the building. This study’s objective is to assess the impact of expanded metal mesh on building energy consumption and natural daylighting. The daylight effects on visual comfort and energy consumption of an office building located in Tainan, Taiwan were studied via building simulation program DIVA. Parameters including window to wall ratios (WWR), perforation rate expanded metal mesh, and glazing of window glass were studied, and a daylight standard of LEED rating system was used for evaluation. The results showed that when the office building with large WWR and less glazing, the expanded metal mesh performed a better energy saving effect. For an office building with 50% WWR, the laminated clear glass and expanded metal mesh with 21% perforation rate were suggested to be the best design solution for meeting the LEED daylight standard and the lowest energy consumption.

Analysis on Energy Saving Effect of Inner Sunshade in Beijing Area

2011 ◽  
Vol 347-353 ◽  
pp. 3024-3028
Author(s):  
Wei Lun Wang ◽  
Jing Chao Xie ◽  
Wei Yang ◽  
Xiao Ming Ma
Keyword(s):  
Energy Saving ◽  
Simulation Analysis ◽  
Office Building ◽  
Cooling Load ◽  
Indoor Temperature ◽  
Beijing Area ◽  
Saving Effect

By means of researching an office building in Beijing area and making simulation analysis on the data concerning energy saving effect of building sunshade, the paper investigates the effects of different sunshade systems on indoor temperature and cooling load, and theologically selects the optimal sunshade system best suitable to Beijing area. The research shows that if a suitable inner sunshade system is applied, an energy saving effect of over 30% can reached.

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