scholarly journals REQUIRED ADDITIONAL HEATING POWER OF BUILDING DURING INTERMITTED HEATING

2010 ◽  
Vol 16 (1) ◽  
pp. 141-148 ◽  
Author(s):  
Darius Pupeikis ◽  
Arūnas Burlingis ◽  
Vytautas Stankevičius
Keyword(s):  
Energy Consumption ◽  
Thermal Energy ◽  
Energy Savings ◽  
Thermal Inertia ◽  
Heating System ◽  
Heating Power ◽  
Effective Solution ◽  
Intermittent Heating ◽  
One Year ◽  
Reduced Temperature

By introduction of intermittent heating of building we can reduce the thermal energy consumption for heating. But it requires the additional power of heating system. It is determined that the most effective solution for energy savings is to enlarge the heating power approximately by 50% for most of buildings. The simulation has showed that for buildings with a medium thermal inertia (time constant τ = 144 h) the expenses by employing the intermittent heating (reduced temperature period: 12 h on working days and 48 h at weekends), pays back after one year. By designing the heating system we must pay attention to thermal inertia of building. Our research showed that for various thermal inertias of building, the adequate modes of intermittent heating must be chosen. Santrauka Šildant pastata, esant papildomai šiluminei galiai, galima sumažinti sunaudojamos šilumines energijos. Nustatyta, kad papildomos šilumines galios (+50 %) sanaudos, siekiant pagreitinti temperatūros padidinima vidutinio masyvumo (τ = 144 h) pastatu patalpose ir taikant protarpini šildyma (12 h darbo dienomis ir 48 h savaitgaliais), atsiperka po vieneriu metu. Projektuojant reikia atsižvelgti i pastato paskirti, masyvuma ir šildymo sistemos galia, siekiant sutaupyti šilumines energijos bei gauti ekonomine nauda, taikant protarpini šildyma. Tyrimai parode, kad ivairaus masyvumo pastatams turi būti taikomi atitinkami protarpinio šildymo periodai.

scholarly journals Overview of Energy Savings and Efficiency Strategies at the University of Jordan Hospital

2017 ◽  
Vol 14 (1) ◽  
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Heating System ◽  
Market Prices ◽  
Energy Auditing ◽  
Hospital Building ◽  
University Of Jordan ◽  
Solar Water Heating System ◽  
The University ◽  
Current Energy

The main objective of this study is to conduct an Energy Auditing of The University of Jordan Hospital. This hospital is quite known, as one of Jordan’s leading hospitals in human resources and equipment; however, the energy consumption of the hospital over the past few years has proven to be highly expensive. This makes the saving on costs of energy consumption a high priority that cannot be ignored. Energy audit covers the three main sections of the hospital: the Emergency Building, the Clinics Building and the Main Hospital Building. The consumption of energy, which costs the hospital a total of 2,778,426 JD/yr., can be categorized into three main parts, the lighting system, the diesel fuel consumption, and the consumption of water. After analyzing the energy invoices, and visiting the site for inspection, a list of recommended solutions that are applicable to cut down the total energy bill were derived. The implementation of renewable energy was suggested and studied of which a solar water heating system was proposed. A study on photovoltaic cells technology was performed for a sample of guest's rooms, the number of panels needed was found. After that, a feasibility study was conducted. The initial costs, annual savings and payback periods of the suggested system were estimated by the current market prices. It is found that the energy auditing and the solutions would be very beneficial as it will save a total annual value of 346,853 JDs (12.5% of the current energy bill).

Heating System Supervisory Control for Residential Energy Conservation

2009 ◽  
Author(s):  
D’Angelo R. Woods ◽  
James S. Hammonds
Keyword(s):  
Energy Consumption ◽  
Supervisory Control ◽  
Energy Savings ◽  
Heating System ◽  
Hot Water ◽  
System Control ◽  
Thermal Source ◽  
Storage Unit ◽  
Control Approach ◽  
Energy Storage Unit

For most households space heating and domestic hot water production constitute the largest portion of energy consumption, which for a typical home space and water heating can comprise over 60% of the total energy usage. Therefore significant energy savings can be accomplished by using energy sources and systems for heating more efficiently. An approach discussed in this work uses system controls to better manage available resources and balance user comfort with efficient use of energy systems. In this work the results of a supervisory control approach applied to residential heating system are presented. The control system is characterized by a supervisory unit that controls the subsystems. The subsystems of this analysis include a thermal source and an energy storage unit. Dynamic thermal system control is demonstrated using a real-time, pseudo-hardware-in-the-loop test bench. The results show the potential reduction of energy consumption through advanced control implementation.

Long-Term Assessment Methodology of Building Stock Thermal Energy Consumption

2021 ◽  
Author(s):  
◽  
Aleksejs Prozuments
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Thermal Energy ◽  
Energy Use ◽  
Energy Savings ◽  
Building Code ◽  
Space Heating ◽  
Industrial Building ◽  
Building Stock

Energy efficiency in the building stock is a substantial contributor to infrastructure sustainability. In Latvia, buildings’ thermal energy use for space heating accounts for 80 % of total building energy use in the cold season. Therefore, reducing thermal energy consumption for space heating needs through the implementation of energy efficiency measures, enforcement of local building codes and regulations can ultimately lead to cost savings for building owners and stakeholders. The present PhD Thesis introduces a methodology for evaluation of thermal energy saving potential in the long run across residential, public, and industrial building stock under various thermal energy consumption compliance scenarios. These scenarios were developed based on three different building code protocols with a 10-year forecast analysis. Evaluation of the proposed building code implementation practices and their feasibility in Latvian building stock is discussed for these buildings with regards to their long-term thermal energy savings potential.

The Way Households Use the Central Heating System: Observed by a Daily Charge Heat-Energy Consumption Measuring Test

2011 ◽  
Vol 361-363 ◽  
pp. 1047-1050
Author(s):  
Bin Liao
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Average Energy ◽  
Weather Conditions ◽  
Heating System ◽  
Developed Countries ◽  
Heat Energy ◽  
Central Heating ◽  
Average Energy Consumption ◽  
The Way

The pattern of using the household billing to promote heating energy savings has become a focus discussion in the current national energy conservation. Nowadays the average energy consumption in China is 2 to 3 times than the developed countries with the same weather conditions, equivalent to the level of developed countries in 60 to 70 years. We report a daily heat-energy consumption measuring test in Beijing since 2009, the result shows that 90% of the total households we tested never change their valves to regulate the heat exchange systems in two winters, the one at least change their valves once are about 5%. So that the way households use the central heating is not fit for the need to save heat-energy.

Theoretical Solutions for Key Technological Issues on Energy Savings Measurement and Verification

2013 ◽  
Vol 448-453 ◽  
pp. 4394-4398
Author(s):  
Jian Wei Tian ◽  
Hai Hong Chen ◽  
Zhi Zhong Li
Keyword(s):  
Energy Consumption ◽  
Uncertainty Analysis ◽  
Performance Measurement ◽  
Energy Saving ◽  
Energy Savings ◽  
Model Development ◽  
Heating System ◽  
National Standard ◽  
Baseline Model ◽  
Measurement And Verification

Two key technological issues i.e. significant energy consumption factors identification and baseline model development, energy savings uncertainty analysis are analyzed based on international performance measurement & verification protocol (IPMVP) and national standard GB/T 28750. Besides, two theoretical solutions are proposed correspondingly. Finally, energy savings calculation on an energy-saving retrofit project of a building heating system verifies the validity of the theoretical solutions proposed.

A Detached House Simulation Using the International Building Physics Toolbox in Matlab\Simulink

2012 ◽  
Vol 162 ◽  
pp. 567-574
Author(s):  
Vlad Muresan ◽  
Balan Radu ◽  
Donca Radu ◽  
Laura Pacurar
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Heating System ◽  
Building Energy ◽  
Matlab Toolbox ◽  
Energy Behavior ◽  
Detached House ◽  
Building Physics ◽  
Radiant Floor Heating ◽  
The Impact

Energy savings are an important issue in the context of climate change. The main goal of researchers is to study and develop new methods of improving energy efficiency in household heating. In this paper a Matlab toolbox is presented and explained. The toolbox is developed for researchers and students interested in simulating building energy behavior. A test room is developed and simulated and a radiator model is implemented. Two types of heating are used during the simulation: a radiant floor heating and a panel radiator. A simple on-off control is used for each heating system. The goal of the paper is to study the impact on energy consumption of each heating system used and their impact on energy consumption when the two heating systems are used in different configurations.

Building Energy Management: Co-Generation Coupling With Thermal Energy Storage

2002 ◽  
Author(s):  
K. H. Khan ◽  
M. G. Rasul ◽  
M. M. K. Khan
Keyword(s):  
Energy Consumption ◽  
Energy Storage ◽  
Energy Management ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Energy Savings ◽  
Peak Demand ◽  
Building Energy Management ◽  
Demand Reduction ◽  
Chilled Water

This paper is concerned with the feasibility study and evaluation of an energy savings opportunity in buildings energy management using co-generation coupling with thermal energy storage. Both the technical and economical feasibility is presented first for the co-generation and then compared with the co-generation using thermal energy storage. On-site co-generation with double effect absorption chiller provides a potential of at least 13% peak demand reduction and about 16% savings in energy consumption. It provides an internal rate of return (IRR) greater than 21% but saving potential is limited by the low demand of co-generated chilled water within the community of the institution. Thermal energy storage coupling with co-generation offers a simple and economically more attractive approach for maximizing the utilization of co-generated chilled water and shows 23% reduction in peak demand and 21% savings in energy consumption. It provides higher IRR, greater than 25%.

scholarly journals Daylighting Performance of Light Shelf Photovoltaics (LSPV) for Office Buildings in Hot Desert-Like Regions

2020 ◽  
Vol 10 (22) ◽  
pp. 7959 ◽  
Author(s):  
Abdelhakim Mesloub ◽  
Aritra Ghosh
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Simulation Analysis ◽  
Winter Season ◽  
Office Buildings ◽  
Control Technique ◽  
Visual Comfort ◽  
Effective Solution ◽  
Sustainable Buildings ◽  
Ongoing Research

Visual comfort and energy consumption for lighting in large office buildings is an area of ongoing research, specifically focusing on the development of a daylight control technique (light shelf) combined with solar energy. This study aims to investigate the optimum performance of light shelf photovoltaics (LSPV) to improve daylight distribution and maximize energy savings for the hot desert-like climate of Saudi Arabia. A radiance simulation analysis was conducted in four phases to evaluate: appropriate height, reflector, internal curved light shelf (LS) angle, and the integrated photovoltaic (PV) with various coverages (25%, 50%, 75%, and entirely external LS). The results revealed that the optimum is achieved at a height of 1.3 m, the addition of a 30 cm reflector on the top of a window with an internal LS curved angle of 10° with 100% coverage (LSPV1, LSPV2). Such an arrangement reduces the energy consumption by more than 85%, eliminates uncomfortable glare, and provides uniform daylight except for during the winter season. Hence, the optimization of the LSPV system is considered to be an effective solution for sustainable buildings.

MEASURED ENERGY CONSUMPTION ANALYSIS OF A DISTRICT HEATING SYSTEM UNDER DIFFERENT TEMPERATURE CONTROL STRATEGIES

2014 ◽  
Vol 22 (02) ◽  
pp. 1450008 ◽  
Author(s):  
SUNG-HWAN CHO ◽  
SEONG-KI HONG ◽  
SANG-HO CHOI ◽  
M. ZAHEERUDDIN
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
District Heating ◽  
Heating System ◽  
Hot Water ◽  
Control Methods ◽  
Outdoor Temperature ◽  
District Heating System ◽  
Partial Load ◽  
Hot Water Supply

In this study, the secondary side measured energy consumption of a district heating system (DHS) with different hot water supply temperature control methods was compared. Two control methods were evaluated: an outdoor temperature reset control (OTRC) and an outdoor temperature predictive control (OTPC). While the OTRC strategy has been widely used for energy savings in DHS, the results show that the OTPC strategy resulted in higher energy savings. In general, the OTPC strategy maintained lower supply water temperature, and thereby reduced standby losses and increased overall heat transfer rate to the heated spaces due to higher water mass flow rate to the spaces. During the actual energy consumption monitoring, the OTPC strategy saved about 6.6% more energy compared to that of OTRC strategy. Also, it was found that under partial load conditions, such as during the daytime, the fluctuations in hot water supply temperature with OTRC were more severe than OTPC strategy. Overall, the results showed that the OTPC strategy gave better control and was more stable under full load and partial load conditions.

scholarly journals Reducing The Energy Consumption By Using Floor Heating With Phase Change Materials In The Toronto Climate

2021 ◽  
Author(s):  
Lindsay Fialkov
Keyword(s):  
Energy Consumption ◽  
Phase Change ◽  
Phase Change Materials ◽  
Energy Savings ◽  
Cost Savings ◽  
Heating System ◽  
Radiant Floor Heating System ◽  
The Cost ◽  
The Impact ◽  
Floor Heating

This major research project focuses on reducing the energy consumption, by modelling a radiant floor heating system with phase change materials, in the Toronto climate. Computer generated simulations were performed using DesignBuilder software, using an example of a typical condominium in Toronto .Two south facing suites and two north facing suites were investigated. Of those suites, one north facing suite had PCM below the finished floor, as well as one south facing suite. The objective of these simulations was to determine the impact of using PCM in the condo suites. Three different types of PCM were used, in order to determine which type had the biggest energy savings. The PCMs were M91/Q21, M51/Q21 and M27/Q21. The final results showed that the suites with the M27/Q21 PCM had the lowest energy usage. A cost savings comparison was performed based on the rate of energy used and the cost of the energy, provided by the Ontario Energy Board.

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