Indoor temperatures for calculating room heat loss and heating capacity of radiant heating systems combined with mechanical ventilation systems

2016 ◽  
Vol 112 ◽  
pp. 141-148 ◽  
Author(s):  
Xiaozhou Wu ◽  
Bjarne W. Olesen ◽  
Lei Fang ◽  
Jianing Zhao ◽  
Fenghao Wang
Keyword(s):  
Mechanical Ventilation ◽  
Heat Loss ◽  
Radiant Heating ◽  
Heating Systems ◽  
Heating Capacity ◽  
Ventilation Systems

scholarly journals Assessment of Reducing Pollutant Emissions in Selected Heating and Ventilation Systems in Single-Family Houses

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1224 ◽  
Author(s):  
Joanna Hałacz ◽  
Aldona Skotnicka-Siepsiak ◽  
Maciej Neugebauer
Keyword(s):  
Mechanical Ventilation ◽  
Heat Pump ◽  
Carbon Dioxide Emissions ◽  
Natural Ventilation ◽  
Pollutant Emissions ◽  
Single Family ◽  
Heating Systems ◽  
Biomass Boiler ◽  
Final Energy ◽  
Ventilation Systems

The article presents the results of a study aiming to select the optimal source of heat for a newly designed single-family home. Commercial software was used to compare heating and ventilation systems involving a bituminous coal boiler, a condensing gas boiler, a biomass boiler, a heat pump with water and glycol as heat transfer media. The effectiveness of natural ventilation, mechanical ventilation with a ground-coupled heat exchanger, and solar heater panels for water heating were evaluated. The analysis was based on the annual demand for useful energy, final energy, and non-renewable primary energy in view of the pollution output of the evaluated heating systems. The analysis revealed that the heat pump with water and glycol was the optimal solution. However, the performance of the heat pump in real-life conditions was below its maximum theoretical efficiency. The biomass boiler contributed to the highest reduction in pollutant emissions (according to Intergovernmental Panel on Climate Change Change guidelines, carbon dioxide emissions have zero value), but it was characterized by the highest demand for final energy. Mechanical ventilation with heat recovery was required in all analyzed systems to achieve optimal results. The introduction of mechanical ventilation decreased the demand for final energy by 10% to around 40% relative to the corresponding heating systems with natural ventilation.

Study on heating capacity and heat loss of capillary radiant floor heating systems

2020 ◽  
Vol 165 ◽  
pp. 114618 ◽  
Author(s):  
Pei Ding ◽  
Yanru Li ◽  
Enshen Long ◽  
Yin Zhang ◽  
Qinjian Liu
Keyword(s):  
Heat Loss ◽  
Heating Systems ◽  
Heating Capacity ◽  
Radiant Floor Heating ◽  
Floor Heating

scholarly journals Energy Saving Potential of Radiant Floor Heating Assisted by an Air Source Heat Pump in Residential Buildings

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1321
Author(s):  
Yu-Jin Hwang ◽  
Jae-Weon Jeong
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Residential Buildings ◽  
Heating Systems ◽  
Air Source Heat Pump ◽  
Heating Capacity ◽  
Heating Loads ◽  
Radiant Floor Heating ◽  
Floor Heating ◽  
Floor Temperature

The objective of this research is to establish an appropriate operating strategy for a radiant floor heating system that additionally has an air source heat pump for providing convective air heating separately, leading to heating energy saving and thermal comfort in residential buildings. To determine the appropriate optimal operating ratio of each system taking charge of combined heating systems, the energy consumption of the entire system was drawn, and the adaptive floor surface temperature was reviewed based on international standards and literature on thermal comfort. For processing heating loads with radiant floor heating and air source heating systems, the heating capacity of radiant floor heating by 1 °C variation in floor temperature was calculated, and the remaining heating load was handled by the heating capacity of the convective air heating heat pump. Consequently, when the floor temperature was 25 °C, all heating loads were removed by radiant floor heating only. When handling all heating loads with the heat pump, 59.2% less energy was used compared with radiant floor heating only. Considering the local discomfort of the soles of the feet, the floor temperature is expected to be suitable at 22–23 °C, and 31.5–37.6% energy saving compared with those of radiant floor heating alone were confirmed.

Ozonolysis of monoterpenes in mechanical ventilation systems

2005 ◽  
Vol 39 (34) ◽  
pp. 6315-6325 ◽  
Author(s):  
Jerker Fick ◽  
Linda Pommer ◽  
Anders Åstrand ◽  
Ronny Östin ◽  
Calle Nilsson ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Ventilation Systems

scholarly journals Calculation Of Heat Loss Through The Pipes Of The Interior Central Heating System

2015 ◽  
Vol 5 (2) ◽  
pp. 29-36 ◽  
Author(s):  
I. Giurca
Keyword(s):  
Heat Loss ◽  
Heating System ◽  
Building Energy ◽  
Local Heat ◽  
Heat Losses ◽  
Energy Audit ◽  
Heating Systems ◽  
Central Heating ◽  
Calculation Methodology

Abstract The article presents aspects related to the calculation of heat loss through the pipes of the interior central heating system. The purpose of the article is to detail the local heat losses in case of central heating systems. Based on the conclusions of the article, we propose the modification of the calculation methodology related to the building energy audit.

scholarly journals Self-contained ventilation system of civil buildings built into window structures

2018 ◽  
Vol 196 ◽  
pp. 02007
Author(s):  
Arman Kostuganov ◽  
Yuri Vytchikov ◽  
Andrey Prilepskiy
Keyword(s):  
Mechanical Ventilation ◽  
Thermal Protection ◽  
Ventilation System ◽  
Field Tests ◽  
Building Construction ◽  
Labor Input ◽  
Building Envelopes ◽  
Extra Space ◽  
Research Stage ◽  
Ventilation Systems

The article describes development and application of self-contained ventilation systems in civil buildings. It suggests several models of air exchange within the building, compares these models and points out the variant of ventilating with self-contained mechanical systems with utilization of heat. The researchers conclude that structurally self-contained systems of mechanical ventilation with utilization of heat are most efficiently built into window constructions. This installation variant makes it possible to keep the interior, avoid building construction strengthening, shorten time and labor input of construction-assembling works, allow rational use of the vertical building envelopes area without extra space using. The paper key issue is the development of constructive solutions of self-contained ventilation systems main elements to ensure the possibility of their use in window structures. This research stage was developed with account of previous results of field tests and of such ventilation systems theoretical descriptions. The authors assess limit dimensions of the systems suitable for installment into window constructions of civil buildings in the view of modern Russian requirements to thermal protection. The research suggests a general constructive solution of such a ventilation system and a heat exchanger model which can be used as an air heat utilizer in these systems.

Heat Loss in Lactating Sows under Different Ventilation Systems and Diets during Summer

2012 ◽  
Author(s):  
Eliene Justino ◽  
Irenilza A Nääs ◽  
Diego P Neves ◽  
Douglas D Salgado
Keyword(s):  
Heat Loss ◽  
Lactating Sows ◽  
Ventilation Systems
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