Comparison of the Performance of a Forced-Air and a Radiant Floor Residential Heating System Connected to Solar Collectors

2007 ◽  
Vol 129 (4) ◽  
pp. 465-472 ◽  
Author(s):  
Kamel Haddad ◽  
Julia Purdy ◽  
Aziz Laouadi
Keyword(s):  
Solar Energy ◽  
Simulation Models ◽  
Heating System ◽  
Energy Performance ◽  
Analysis Tool ◽  
Air System ◽  
Floor Systems ◽  
Heating Load ◽  
Forced Air ◽  
Building Energy Analysis

A detailed building energy analysis tool is used to model the performance of a forced-air system and a radiant floor system. These two systems use a low-temperature tank to store solar energy from a solar collector array. An electrically heated tank at a higher temperature is used to provide any additional heat needed to meet the space heating load. The simulation models developed are then used to compare the performance of the forced-air and radiant floor systems based on maintaining the same operative temperature inside the space. It is found that the portion of the heating load that comes from solar energy is higher in the case of the radiant system. This portion from solar energy increases even further when the operating temperature of the radiant floor is lowered. The results also show that the energy performance of the radiant floor relative to the forced-air system improves for houses with higher envelope R-values and infiltration rates. Given the many different interacting factors that influence the performance of the solar-assisted systems studied, it is very important to use detailed simulation models to help assess which system is more energy efficient for a particular application.

scholarly journals The impact of ETC/PCM solar energy storage on the energy performance of a building

2019 ◽  
Vol 116 ◽  
pp. 00073
Author(s):  
Robert Sekret ◽  
Piotr Feliński
Keyword(s):  
Solar Energy ◽  
Surface Area ◽  
Solar Collector ◽  
Heating Surface ◽  
Heating System ◽  
Energy Performance ◽  
Primary Energy ◽  
Heat Output ◽  
Solar Fraction ◽  
The Impact

The main goal of this investigation was to increase the solar fraction and reduce the demand for non-renewable primary energy in a building heating system. Thermal performance of the prototype evacuated tube solar collector/storage integrated with a PCM (ETC/PCM) was analyzed. Technical grade paraffin with onset melting point of 51.24°C was used as a PCM. It has been shown that the highest solar energy fraction in the building heating system was obtained with a thermal load of 40 W·m-2 and the highest the surface area of ETC/PCM aperture in relation to the heating surface area value of 0.2. Lowering the heating system parameters from 45/35°C to 35/25°C allowed for an increase in heat output from solar energy in the range from 2.71% to 5.44%. The largest increase in the solar fraction was in the range of the ratio of the surface area of the solar collector ETC/PCM aperture to the area of the heated building from 0.03 to 0.07. In summary, obtained results indicated that the proposed solution allowed reduction of non-renewable primary energy demand in conceptual heating system from 6% to 27% depending on the heat load of the building and the aperture area of the ETC/PCM.

The Design on Heating System for Experiment of Solar Energy and Geothermal-Source Heat Pump

2012 ◽  
Vol 512-515 ◽  
pp. 194-197
Author(s):  
Ying Ling Cai ◽  
Yin Long Wu ◽  
Hua Zhang ◽  
Ji Wei Li
Keyword(s):  
Mathematical Model ◽  
Steady State ◽  
Solar Energy ◽  
Heat Pump ◽  
Dynamic Load ◽  
Solar Collector ◽  
Heating System ◽  
Solar Collectors ◽  
Heating Load ◽  
The Mathematical Model

Through the study on the project, we can easily find that if we do not need heat the whole day, adopting the dynamic load method to calculate the heating load is more advisable compared to adopting a steady-state one, especially when we select the equipment. After establishing the mathematical model of the project, under the premise of meeting the heating load, considered the economy, the optimal solar collector area of this project is 11.1 square meters. In addition, through simulating the project, we can learn that the best azimuth of solar collectors in Shanghai is south by east 22.5 °.

Energy code compliant house design for lowest lifecycle cost based on market-available technologies

2019 ◽  
Vol 46 (4) ◽  
pp. 308-321 ◽  
Author(s):  
Behnaz Hesaraki ◽  
YuXiang Chen ◽  
Regina Dias Ferreira ◽  
Mohamed Al-Hussein
Keyword(s):  
Cost Effective ◽  
Heating System ◽  
Building Energy ◽  
Energy Performance ◽  
Building Envelope ◽  
Water Heater ◽  
Forced Air ◽  
House Design ◽  
Energy Codes ◽  
Code Compliance

Investigating code-compliant and market-available options for building envelope, domestic systems, and solar photovoltaic systems accounting for construction and operational cost, the near-lowest lifecycle cost (LCC) design compliant with building energy codes is identifiable following the methodology proposed in this study. A case study of a house design in Edmonton, Canada, is conducted to demonstrate the methodology; the 30-year LCC of options for code-compliance are calculated for three energy cost scenarios. The results indicate that the most cost-effective design may have a 16% to 30% lower LCC than other investigated designs. In terms of achieving a similar level of energy performance, a house that uses a heat recovery ventilator, forced-air gas-fired space heating system, tankless water heater, and features a less-insulated building envelope offers the lowest LCC. The results of this study suggest that LCC should be considered in the development of building energy regulations to include economic aspects while proposing energy standards.

Life-Cycle Assessment and Life-Cycle Cost as Collaborative Tools in Residential Heating System Selection

2010 ◽  
Vol 5 (3) ◽  
pp. 107-115 ◽  
Author(s):  
Scott Glick ◽  
Angela A Guggemos
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Hybrid System ◽  
Life Cycle Cost ◽  
High Efficiency ◽  
Heating System ◽  
Comparative Case Study ◽  
Residential Heating ◽  
Air System ◽  
Forced Air

Typically the selection of a residential heating system focuses on first costs rather than the economic or environmental life cycle consequences. The use of life cycle assessment and life cycle cost methodologies in the design phase provide additional criteria for consideration when selecting a residential heating system. A comparative case study of a gas forced air and radiant solar heating system was conducted for a 3,000 square foot house located in Fort Collins, Colorado, U.S.A. The initial results of an analysis of the life cycle assessment and the life cycle cost data indicated the gas forced air system was superior, both environmentally and economically. Further data analysis pinpointed solar radiant system components for replacement in an effort to reduce both life cycle environmental emissions and costs. This analysis resulted in a hybrid radiant system using a high-efficiency gas-fired boiler, a choice that lowered both the solar radiant system's costs and emissions. This new system had slightly lower environmental impacts than both the gas forced air system and solar radiant system. Unfortunately the hybrid system had less impact on the life cycle cost with the hybrid system substantially more expensive then the gas-forced air alternative.

scholarly journals Potential solar energy use in a residential district in Nis

Spatium ◽  
2009 ◽  
pp. 9-18 ◽  
Author(s):  
Sanja Stevanovic ◽  
Mila Pucar ◽  
Vesna Kosoric
Keyword(s):  
Solar Energy ◽  
Energy Use ◽  
Renewable Energy Sources ◽  
Heating System ◽  
Energy Performance ◽  
Electricity Production ◽  
Design Solution ◽  
Photovoltaic Modules ◽  
Residential District ◽  
Solar Water Heating System

Serbia is a suitable place for solar energy exploitation with more than 2000 sunny hours per year over 80% of its territory. In the paper, the existing state is analyzed and the possibilities of solar energy use are examined by employing a combined approach. This relies on the following elements: an attached conservatory with remote heat storage for space heating in the period October-April; a canopy covered by flexible organic photovoltaic modules for electricity production in the period May- September, and a solar water heating system throughout the year. In addition to an analysis of energy performance of the proposed design solution, its economic aspect is also discussed, which suggests that investing in energy efficiency projects should be encouraged provided the state adopts an appropriate system of subsidies for the use of renewable energy sources.

scholarly journals An empirical analysis on the operational profile of liquefied natural gas carriers with steam propulsion plants

2020 ◽  
pp. 1-20
Author(s):  
Carlos González Gutiérrez ◽  
Santiago Suárez de la Fuente ◽  
Jean-Marc Bonello ◽  
Richard Bucknall
Keyword(s):  
Natural Gas ◽  
Greenhouse Gases ◽  
Empirical Analysis ◽  
Continuous Monitoring ◽  
Simulation Models ◽  
Energy Performance ◽  
Liquefied Natural Gas ◽  
Liquid Hydrocarbons ◽  
Operational Profile ◽  
Emission Studies

Abstract Liquefied natural gas (LNG) offers negligible NOx and SOx emissions as well as reductions in CO2 compared with other liquid hydrocarbons. LNG is a significant player in the global energy mix, with a projection of 40% increase in demand for the next two decades. It is anticipated that the expected rise in demand will cause the fleet of LNG carriers (LNGC) to expand. This work concentrates on steam-powered LNGC, which accounted for 47% of the LNGC fleet in 2018. It performs an empirical analysis of continuous monitoring data that provide high levels of accuracy and transparency. The analysis is done on data collected from 40 LNGCs for over a year to estimate the fleet's operational profile, fuel mix and energy performance. The findings of this work are relevant for bottom-up analysis and simulation models that depend on technical assumptions, but also for emission studies such as the upcoming Fourth International Maritime Organization Greenhouse Gases study.

Predicting Hourly Heating Load in a District Heating System Based on a Hybrid CNN-LSTM Model

2021 ◽  
pp. 110998
Author(s):  
Jiancai Song ◽  
Liyi Zhang ◽  
Guixiang Xue ◽  
YunPeng Ma ◽  
Shan Gao ◽  
...  
Keyword(s):  
District Heating ◽  
Heating System ◽  
District Heating System ◽  
Heating Load

scholarly journals Performance of Hybrid Single Well Enhanced Geothermal System and Solar Energy for Buildings Heating

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2473
Author(s):  
Yujiang He ◽  
Xianbiao Bu
Keyword(s):  
Solar Energy ◽  
Service Life ◽  
Heating System ◽  
Hydrothermal Systems ◽  
Geothermal System ◽  
Heat Output ◽  
Enhanced Geothermal System ◽  
Geothermal Heat ◽  
Hybrid Heating ◽  
Single Well

The energy reserves in hot dry rock and hydrothermal systems are abundant in China, however, the developed resources are far below the potential estimates due to immature technology of enhanced geothermal system (EGS) and scattered resources of hydrothermal systems. To circumvent these problems and reduce the thermal resistance of rocks, here a shallow depth enhanced geothermal system (SDEGS) is proposed, which can be implemented by fracturing the hydrothermal system. We find that, the service life for SDEGS is 14 years with heat output of 4521.1 kW. To extend service life, the hybrid SDEGS and solar energy heating system is proposed with 10,000 m2 solar collectors installed to store heat into geothermal reservoir. The service life of the hybrid heating system is 35 years with geothermal heat output of 4653.78 kW. The novelty of the present work is that the hybrid heating system can solve the unstable and discontinuous problems of solar energy without building additional back-up sources or seasonal storage equipment, and the geothermal thermal output can be adjusted easily to meet the demand of building thermal loads varying with outside temperature.

Sign in / Sign up

Export Citation Format

Share Document