Enhancement in peak shifting and shaving potential of electrically heated floor residential buildings using heat extraction system

2018 ◽  
Vol 18 ◽  
pp. 435-446 ◽  
Author(s):  
Ying Sun ◽  
Karthik Panchabikesan ◽  
Mahmood Mastani Joybari ◽  
Dave Olsthoorn ◽  
Alain Moreau ◽  
...  
Keyword(s):  
Residential Buildings ◽  
Heat Extraction ◽  
Extraction System ◽  
Heated Floor

scholarly journals TECHNOLOGIES, SYSTEMS, AND EQUIPMENT FOR WASTEWATER HEAT UTILIZATION (REVIEW)

2020 ◽  
Vol 42 (3) ◽  
pp. 39-46
Author(s):  
B.І. Basok ◽  
M.P. Novitska ◽  
S.M. Goncharuk
Keyword(s):  
Heat Recovery ◽  
Scientific Literature ◽  
Residential Buildings ◽  
Heat Extraction ◽  
Utilization Review ◽  
Heat Utilization ◽  
Factors Influencing ◽  
Main Factors ◽  
Political Economic

The paper analyzes research, technologies, and equipment related to wastewater heat utilization systems. The main factors influencing the development of the industry and the implementation of such systems are given. Such factors include: social, political, economic, technological, legal and environmental. The classification of technologies and equipment for wastewater heat utilization according to the place of heat extraction is given. Namely, low potential wastewater heat can be collected at the treatment plants, in sewer collectors leading to treatment plants and directly in houses. The paper describes the available research in the scientific literature on these three categories The global scientific community is working to create efficient wastewater heat recovery systems. The environmental situation requires greater use of wastewater recovery systems. An important issue is to increase awareness and education of the population, as this approach will increase the degree of implementation of wastewater heat utilization systems in residential buildings.

Concept of Triple Heat Exchanger-Assisted Solar Pond Through an Improved Analytical Model

2019 ◽  
Vol 141 (5) ◽  
Author(s):  
Sunirmit Verma ◽  
Ranjan Das
Keyword(s):  
Analytical Model ◽  
Power Output ◽  
Heat Exchangers ◽  
Thermal Power ◽  
Convective Zone ◽  
Heat Extraction ◽  
Extraction System ◽  
Seepage Water ◽  
Solar Pond ◽  
Bottom Zone

A new three-zone heat extraction system and its analytical model for maximizing the thermal power output of salt gradient solar ponds against a given volume is proposed. The present study considers internal heat exchangers installed within the non-convective zone (NCZ), lower-convective zone (LCZ), and the ground below the pond. The work is validated against a simplified version of the model (eliminating ground and bottom-zone heat extractions) available in the existing literature. Contrary to the conventional practice of optimizing only the middle-zone pond thickness, here, the newly proposed expression is used to find ideal values of both the middle- and bottom-zone thicknesses of the pond along with its cross-sectional area. The present work acknowledges that although the three-zone heat extraction system is the best, yet if a choice for two-zone heat extraction is to be made between the NCZ–LCZ and ground–LCZ, then the former is a better alternative. The power output is observed to increase asymptotically with mass flow rates of the three heat exchangers. However, their values must lie much below their theoretical asymptotic limits and their selection is regulated by constructional and operational constraints. These involve a minimum pond depth to offset surface evaporation, ground seepage water loss, and constraints preventing turbulent flow in heat exchangers to reduce friction loss and pumping power. This work recommends using three heat exchangers instead of either one or two and provides cardinal guidelines to extract heat in an ideal manner for a fixed solar pond volume.

An internal heat extraction system for solar ponds

Solar Energy ◽  
1985 ◽  
Vol 34 (4-5) ◽  
pp. 297-302 ◽  
Author(s):  
F. Sabetta ◽  
M. Pacetti ◽  
P. Principi
Keyword(s):  
Internal Heat ◽  
Heat Extraction ◽  
Extraction System ◽  
Solar Ponds

An Autonomous Controller for Ductless Mini-Split Heat Pumps, Residential Solar Thermal Collection, and Hydronic Floor Heating

2014 ◽  
Author(s):  
Andrew Cross ◽  
Kimberly Hammer ◽  
Rick Hurt ◽  
Robert F. Boehm
Keyword(s):  
Low Voltage ◽  
Residential Buildings ◽  
Storage System ◽  
Heat Pumps ◽  
Hot Water ◽  
Solar Thermal ◽  
Power Line Communications ◽  
Ip Network ◽  
Heated Floor ◽  
And Storage

A unique autonomous control system was developed to manage the HVAC components of a residence built specifically for an ultra-efficient home competition. Some of the home’s HVAC components that contribute to its ultra-efficiency (and necessitate such an autonomous controller) include multiple ductless mini-split heat pumps, multiple hydronic heated floor loops, multiple circulating ceiling fans, and a closed-loop solar thermal collection and storage system that not only provides hot water to the hydronic heated floors, but also supplies the home with domestic hot water. The autonomous controller integrates all this equipment with a mixture of technology that includes power-line communications, both wired and wireless TCP/IP network signals, low-voltage wiring, and infrared signals. By utilizing these many different methods to communicate with equipment around the home, the controller is able to simultaneously regulate components and systems that are often considered “stand alone” or impractical to implement in residential buildings due to their need for constant manual operation. The result is an HVAC system that consumes very little energy while still providing an expected level of comfort.

scholarly journals Nitrogen source recovery from mature leachate via heat extraction technology: An engineering project application

2022 ◽  
Author(s):  
Jianying Xiong ◽  
Chen Zhang ◽  
Pinjing He ◽  
Jun He ◽  
Xiaodong Dai ◽  
...  
Keyword(s):  
Cost Effective ◽  
Heat Extraction ◽  
Extraction System ◽  
Extraction Technology ◽  
Leachate Treatment ◽  
Engineering Project ◽  
Treated Effluent ◽  
Ammonia Recovery ◽  
Municipal Solid Waste Landfills ◽  
Operation Results

Abstract Large pool of ammonia in mature leachate is challenging to treat with a membrane bioreactor system to meet the discharge standard for pollution control of municipal solid waste landfills in China (GB 16889-2008) without external carbon source addition. In this study, an engineering leachate treatment project with a scale of 2,000 m3/d was operated to evaluate the ammonia heat extraction system (AHES), which contains preheat, decomposition, steam-stripping, ammonia recovery, and centrifuge dewatering. The operation results showed that NH3-N concentrations of raw leachate and treated effluent from an ammonia heat extraction system (AHES) were 1,305–2,485 mg/L and 207–541 mg/L, respectively. The ratio of COD/NH3-N increased from 1.40–1.84 to 7.69–28.00. Nitrogen was recovered in the form of NH4HCO3 by the ammonia recovery tower with the introduction of CO2, wherein, the mature leachate can offer 37% CO2 consumption. The unit consumptions of steam and power were 8.0% and 2.66 kWh/m3 respectively, and the total operation cost of AHES was 2.06 USD per cubic leachate. These results confirm that the heat extraction is an efficient and cost-effective technology for the recovery of nitrogen resource from mature leachate.

Building Energy Performance Using Sheap

1992 ◽  
pp. 43-56
Author(s):  
Mat Nawi Wan Hassan ◽  
Mohd Yusoff Senawi
Keyword(s):  
Energy Analysis ◽  
Residential Buildings ◽  
Building Energy ◽  
Energy Performance ◽  
Weighting Factor ◽  
Climatic Conditions ◽  
Heat Extraction ◽  
Weather Data ◽  
Commercial Building ◽  
Analysis Package

This paper describes a Simplified Hourly Energy Analysis Package (SHEAP) for the computation of annual energy consumption in non-residential buildings. The package, developed at the Mechanical Engineering Faculty, uses the transmission matrix method in calculating conduction heat gains through opaque building sections, and adopts the weighting factor method for the calculations of cooling loads, heat extraction rates and actual space air dry bulb temperatures. Typical daily profiles of measured hourly weather data are used to approximate the external climatic conditions over a one-year period. A preliminary validation study indicates that SHEAP produces, reasonably good estimates when compared to the predictions by BUNYIP, a commercial building energy analysis package.

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