Central Ventilation System with Heat Recovery as One of the Measures to Upgrade Energy Efficiency of Historic Buildings

2014 ◽  
Vol 633-634 ◽  
pp. 1077-1081 ◽  
Author(s):  
Viktor Pukhkal ◽  
Nikolay Vatin ◽  
Vera Murgul
Keyword(s):  
Heat Recovery ◽  
Natural Ventilation ◽  
Ventilation System ◽  
Heat Losses ◽  
Historic Buildings ◽  
Existing Buildings ◽  
Apartment Building ◽  
Thermal Shield ◽  
Saint Petersburg ◽  
Reducing Energy

Improving thermal shield in buildings and reducing energy consumption have become major problems to be solved for the recent decades. Natural ventilation accounts for nearly half of heat losses in existing buildings. A controlled heat recovery ventilation system makes it possible to reduce irrational heat losses and improve microclimatic comfort. A typical historic residential apartment building constructed before industrial times in Saint-Petersburg is subject of this article. Options of centralized controlled heat recovery ventilation systems for old historic apartment buildings in Saint-Petersburg are suggested in this article.

The Use of Decentralized Ventilation Systems with Heat Recovery in the Historical Buildings of St. Petersburg

2014 ◽  
Vol 635-637 ◽  
pp. 370-376 ◽  
Author(s):  
Vera Murgul ◽  
Dusan Vuksanovic ◽  
Nikolay Vatin ◽  
Viktor Pukhkal
Keyword(s):  
Heat Recovery ◽  
Ventilation System ◽  
Energy Performance ◽  
Saint Petersburg ◽  
Exhaust Ventilation ◽  
Different Types ◽  
Energy Efficiency Standards ◽  
Energy Efficient Building ◽  
Cultural Monuments ◽  
Ventilation Systems

Historic apartment buildings in Saint-Petersburg no longer meet today’s energy efficiency standards and need upgrading to achieve lower energy-consumption. The possibilities to upgrade old buildings – historic and cultural monuments – are initially limited. A controlled heat recovery ventilation system is considered to be an integral part of energy efficient building. Provided engineering facilities of a building are updated and reequipped energy performance increases without any impact on building exteriors. Different types of decentralized intake and exhaust ventilation systems with heat recovery based on various types of heat exchangers are considered in a detailed way.

scholarly journals Research on Best Solution for Improving Indoor Air Quality and Reducing Energy Consumption in a High-Risk Radon Dwelling from Romania

2021 ◽  
Vol 18 (23) ◽  
pp. 12482
Author(s):  
Ion-Costinel Mareș ◽  
Tiberiu Catalina ◽  
Marian-Andrei Istrate ◽  
Alexandra Cucoș ◽  
Tiberius Dicu ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Heat Recovery ◽  
Natural Ventilation ◽  
High Efficiency ◽  
Ventilation System ◽  
Radon Level

The purpose of this article is the assessment of energy efficiency and indoor air quality for a single-family house located in Cluj-Napoca County, Romania. The studied house is meant to be an energy-efficient building with thermal insulation, low U-value windows, and a high efficiency boiler. Increasing the energy efficiency of the house leads to lower indoor air quality, due to lack of natural ventilation. As the experimental campaign regarding indoor air quality revealed, there is a need to find a balance between energy consumption and the quality of the indoor air. To achieve superior indoor air quality, the proposed mitigation systems (decentralized mechanical ventilation with heat recovery combined with a minimally invasive active sub-slab depressurization) have been installed to reduce the high radon level in the dwelling, achieving an energy reduction loss of up to 86%, compared to the traditional natural ventilation of the house. The sub-slab depressurization system was installed in the room with the highest radon level, while the local ventilation system with heat recovery has been installed in the exterior walls of the house. The results have shown significant improvement in the level of radon decreasing the average concentration from 425 to 70 Bq/m 3, respectively the carbon dioxide average of the measurements being around 760 ppm. The thermal comfort improves significantly also, by stabilizing the indoor temperature at 21 °C, without any important fluctuations. The installation of this system has led to higher indoor air quality, with low energy costs and significant energy savings compared to conventional ventilation (by opening windows).

scholarly journals RESEARCH EFFICIENCY OF NATURAL VENTILATION SYSTEM OF APARTMENT BUILDING

2019 ◽  
Vol 4 (7) ◽  
pp. 49-56
Author(s):  
Ф. Абдразаков ◽  
Fyarid Abdrazakov ◽  
А. Поваров ◽  
Andrey Povarov
Keyword(s):  
Natural Ventilation ◽  
Ventilation System ◽  
Exhaust System ◽  
Field Studies ◽  
Apartment Building ◽  
Apartment House ◽  
Ventilation Ducts ◽  
Controlled Flow ◽  
Research Efficiency ◽  
Ventilation Systems

The analysis of existing research in the field of ventilation systems is performed and the current shortcomings of the ventilation systems of secondary apartment houses of series 114–85 are identified. The instability of the natural ventilation system of an apartment building characterized by variable air exchange and overturning ventilation in the ventilation ducts is demonstrated. Field studies of the natural ventilation system efficiency of an apartment house series 114–85 located in Saratov are carried out. According to the research results, the absence of traction and the presence of reverse traction in the exhaust ducts of the ventilation system are revealed. The initial reason for the lack of normal traction in the ventilation system associated with its calculation in the project of building a house series 114-85 for open mode operation is stablished. The increased tightness of windows and doors of apartments is determined, resulting in a reversed traction and the impossibility of uniform distribution of air vertically of the house, therefore installing only the exhaust system of the natural ventilation of an apartment building is inefficient. It is established that the ventilation channel in the kitchen is constantly working to extract air from the premises of the apartments, since the bathroom door is tightly closed that does not correspond to the normative indicators. The analysis of ventilation system on the example of three-bedroom apartments shows the need for additional supply devices for controlled flow of outside air into the premises of apartments. The use of supply wall valves of KIV-125 brand and window ventilation valves of Air Box Comfort brand is provided. A methodology of selection the modern, highly efficient energy saving models of turbo ventilators is presented, increasing traction in exhaust ventilation ducts at 40 % and independent of direction and wind gusts.

Climate control systems and equipment — heating, energy conservation and system failure

1987 ◽  
Vol 11 ◽  
pp. 75-86
Author(s):  
M. Jamieson
Keyword(s):  
Control Systems ◽  
Heat Recovery ◽  
Fossil Fuels ◽  
Natural Ventilation ◽  
Biogas Production ◽  
Ventilation System ◽  
Live Weight ◽  
Good Control ◽  
Production Costs ◽  
Climate Control

AbstractConventionally heat consumption forms a small proportion (about 002) of the total cost of producing finishing pigs. Heating costs are incurred from farrowing to about 20 kg live weight and generally represent about 0–05 of production costs to this stage.Apart from the incorporation of adequate insulation in the building structure, the main means of restricting heating costs is by good control of minimum ventilation rate. Efficient control systems are available but operators do not always fully understand how they are intended to work, so effective training is as important as clear operating instructions.Techniques exist for the reduction of fossil fuel consumption but all involve the expenditure of additional capital and have running costs of their own. In relation to the current low costs of fossil fuels, oil and propane, even the simplest of these methods are difficult to justify in commercial practice. They include: heat recovery by static recuperator from ventilation exhaust air; and heat recovery by heat pump from low temperature sources such as aerobically treated slurry, ground water and exhaust air.Alternative non-fossil fuels include biogas and straw. Biogas production by anaerobic digestion of slurry is expensive in capital and is only feasible where the slurry must be treated for other reasons, such as odour control. Heat production from straw may be economical where the straw is available at low cost and simple stoking aids (e.g. existing tractor fore-loaders) are used.Fail-safe equipment to protect stock in the event of forced ventilation system breakdown must be carefully designed and installed to be reliable. Methods are available to suit the range of ventilation and housing systems. Failure of natural ventilation systems is less likely to cause problems, and indications to the stockman of abnormal temperature conditions should be sufficient to prevent loss of stock.

Development of the Ventilation System in Historical Buildings of St. Petersburg

2014 ◽  
Vol 633-634 ◽  
pp. 977-981 ◽  
Author(s):  
Vera Murgul ◽  
Dusan Vuksanovic ◽  
Viktor Pukhkal ◽  
Nikolay Vatin
Keyword(s):  
Residential Buildings ◽  
Ventilation System ◽  
Heating System ◽  
Historic Buildings ◽  
Engineering Systems ◽  
Historical Buildings ◽  
Saint Petersburg ◽  
Air Ventilation ◽  
Ventilation Systems

The article presents an analysis of the primary technologies used to arrange air ventilation systems in residential buildings in Saint-Petersburg during the late 18th and early 20th centuries. The historic buildings construction and engineering systems is indisputable interest and can be subject to conservation of historic buildings in addition to conservation of architectural facades. The article analyzed historical techniques ventilation device in conjunction with the heating system.

scholarly journals Performance of a natural ventilation system with heat recovery in UK classrooms: An experimental study

2018 ◽  
Vol 179 ◽  
pp. 278-291 ◽  
Author(s):  
Paraskevi Vivian Dorizas ◽  
Stamp Samuel ◽  
Mumovic Dejan ◽  
Yan Keqin ◽  
Makris-Makridis Dimitris ◽  
...  
Keyword(s):  
Experimental Study ◽  
Heat Recovery ◽  
Natural Ventilation ◽  
Ventilation System

Passive Technology Resurrects Existing Buildings — Case Study on Design Contest of Renovation of Qingdao Hiser Hospital

2014 ◽  
Vol 584-586 ◽  
pp. 1858-1862
Author(s):  
Wei Dong Ji ◽  
Yan Wie Wang ◽  
Zhe Tang
Keyword(s):  
Natural Ventilation ◽  
Existing Buildings ◽  
Natural Lighting

This paper is based on the contest of renovation of Qingdao Hiser Hospital. It first analyzes the current problems existing in Qingdao Hiser Hospital, then, pinpointing to the problems, applies the concept of priority of passive technology to the design of renovation scheme, and finally, adopts passive technology to do the renovation design, to resolve problems like noises, natural lighting and natural ventilation, etc.

scholarly journals Heat recovery by means of a ventilation unit

2021 ◽  
Vol 263 ◽  
pp. 04025
Author(s):  
Dmitrii Khlopitsyn ◽  
Andrey Rymarov
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Heat Recovery ◽  
New Technologies ◽  
Ventilation System ◽  
New Developments ◽  
Before And After ◽  
Save Energy ◽  
Recuperative Heat Exchanger ◽  
Air Removal

Energy consumption all over the world is constantly growing. To save energy, new technologies are being developed for the efficient use of energy resources. The goal of all new developments is to use less energy to provide the same level of energy supply for technological processes or buildings. The problem of energy saving is relevant for the ventilation system. Together with the removed air, a large amount of heat is lost, which is not advisable. In order to avoid these losses, heat recuperators began to be used, heating the cold supply air due to the warm air removed from the room. This development belongs to the field of energy saving. The goal is to increase efficiency by reheating the air after the heater with the help of a recuperator for a given temperature difference in the supply air before and after the recuperative heat exchanger. The development is a design of a ventilation unit with air removal and supply air ducts, combined into one housing with a separate, according to the “screw” principle, heat transfer wall, for use in the ventilation system in order to ensure an optimal microclimate in the room. Thus, as a result of using the presented device, the efficiency of the room ventilation unit is increased by reducing the energy consumption for heating the supply air with a heater.

scholarly journals Three-Dimensional Simulation of Wind-Driven Ventilation Through a Windcatcher With Different Inlet Designs

2019 ◽  
Vol 12 (4) ◽  
Author(s):  
Peter Abdo ◽  
Rahil Taghipour ◽  
B. Phuoc Huynh
Keyword(s):  
Wind Speed ◽  
Average Velocity ◽  
Natural Ventilation ◽  
Ventilation System ◽  
Three Dimensional ◽  
Cfd Modeling ◽  
Ansys Fluent ◽  
Wind Velocities ◽  
Dimensional Simulation ◽  
Convergent Inlet

Abstract Windcatcher is an effective natural ventilation system, and its performance depends on several factors including wind speed and wind direction. It provides a comfortable and healthy indoor environment since the introduced fresh air decreases the moisture content and reduces the pollutant concentration. Since the wind speed and its direction are generally unpredictable, it is important to use special inlet forms and exits to increase the efficiency of a windcatcher. In this study, computational fluid dynamics (CFD) modeling is implemented using ansys fluent to investigate the airflow entering a three-dimensional room through a windcatcher with different inlet designs. Three designs are studied which are a uniform inlet, a divergent inlet, and a bulging-convergent inlet. The airflow pattern with all inlets provided adequate ventilation through the room. With all the applied wind velocities (1, 2, 3, and 6 m/s) at the domain's inlet, the divergent inlet shape has captured the highest airflow through the room and provided higher average velocity at 1.2 m high enhancing the thermal comfort where most of the human occupancy occurs. With 6 m/s wind velocity, the divergent inlet has captured 2.55% more flow rate compared to the uniform inlet and 4.70% compared to the bulging-convergent inlet, and it has also provided an average velocity at 1.2 m high in the room of 7.16% higher than the uniform inlet and 8.44% higher than the bulging-convergent inlet.

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