Department of Heating, Ventilation
and Dust Removal Technology
PL | EN
baner

Research area

Studies on heating systems and their diagnostic

The Department conducts research work on heating, heating systems, diagnostic and laboratory tests of radiators and heat cost allocators. These works include topics of:

  • diagnostic and evaluation of heat sources, heating and hot water systems in buildings,
  • heating process simulation in the heating system components for test facilities and working conditions, verification of simulation results in the research laboratory,
  • laboratory tests of radiators and heat cost allocators in normative environments, carried out in an open test chamber,
  • laboratory tests of heating system elements and heat cost allocators for whole heating season period, performed in a specialized climate chamber allowing for the external climate simulations,
  • evaluation and improvement of individual accounts systems for heating costs in buildings with locals,
  • internal heat gains in buildings,
  • efficient and passive building,
  • heating of large volume buildings (e.g. churches, etc.)

Studies on CFD numerical modelling

The Department conducts research in the field of numerical modelling of air distribution in ventilated spaces using computational fluid dynamics techniques. Researches are using ANSYS CFX and Ansys Fluent Airpack software. These works include topics of:

  • the distribution of air parameters in existing facilities,
  • studies on thermal comfort conditions in existing or planned facilities,
  • developing the concept of improving the thermal and humidity conditions in existing facilities,
  • verification of various air distribution concepts in the planned facilities,
  • studies on the various factors' impact on the conditions in ventilated building.

Research works are carried out for different ventilated or air-conditioned objects, e.g. auditorium halls, indoor ice rinks, swimming halls, closed garages, office and residential spaces.

Studies on integrated thermal simulation of the building

In research conducted at the Department, an integrated computer simulation (in dynamic conditions) is used for the thermal calculations of the building. Researchers use programs such as: TRNSYS, IDA ICE, ESP-r.

The research works include topics of:

  • calculation of the heat demand in existing or planned buildings,
  • calculation of energy consumption - taking into account heat sources and internal heating and ventilation systems in existing or planned buildings,
  • studies of thermal comfort conditions in existing or planned facilities,
  • studies on thermal and humidity conditions (including conditions for thermal comfort) in buildings,
  • studies on the impact of various internal factors (e.g. number of users, the ventilation intensity, type of control) and external factors (e.g. external climate, building location) on the conditions in the building.

Studies are carried out for different objects, e.g. residential or office buildings, schools, and museum buildings.

The calculations are carried out for the actual or standard climatic conditions with any time step (up to 1 min).

Studies on ventilation systems and their diagnostics

The Department conducts research in the field of the mechanical ventilation and air-conditioning diagnostics, including measurements in the real systems allowing to verify the correct operation of each installation component and its’ performance. In addition, laboratory tests are conducted in the field of thermal characteristics of heaters and air damper characteristics.

The research works include topics of:

  • performance of supply and exhaust diffusers,
  • momentary heating power of the heater,
  • measurements of the heat recovery efficiency,
  • chiller cooling capacity,
  • laboratory tests of air flow shaping through air dampers.

Studies on indoor environment and air exchange in residential buildings

Indoor environmental quality includes thermal conditions, air quality, noise and lighting. The Department carries out the study on the indoor environment quality, taking into account its’ impact on the occupants health and their productivity. Evaluations include both in situ in measurements in existing building, laboratory tests carried out in a climate chamber and numerical modelling.

The research include topics of:

  • measurements of indoor environmental conditions and their assessment (in public and residential buildings),
  • the impact of thermal conditions and air quality on health, comfort and productivity,
  • studies of air exchange in residential buildings,
  • the characteristics of indoor air conditions in rooms with window diffusers,
  • studies involving numerical modelling (using Fluent and Ansys software) on: the air distribution in residential buildings and contaminants distribution (mainly carbon dioxide exhaled by occupants),
  • numerical modelling of human respiration processes.

Studies on local HVAC systems

Current recommendations for the indoor environment refer to overall conditions which should be acceptable to the majority of users. Traditionally used HVAC solutions, like mixing ventilation, are designed to maintain uniform conditions throughout the room. Due to individual thermal sensations and preferences of occupants, such approach will always result in at least 5% of dissatisfied people - even with the best matched thermal parameters. The Department carries out the research on alternative local heating/cooling systems, e.g. at workplaces. This approach allows for individual adjustment of systems' operation, allowing control of the thermal conditions according to current users’ preferences and increase in the number of people who feel comfortable.

The works include topics of:

  • measurements of indoor environmental conditions and their evaluation,
  • the impact of thermal conditions and air quality on health, comfort and productivity,
  • the impact of the local HVAC systems on energy consumption reduction.

Studies on the smoke ventilation effectiveness

Impact of external parameters (such as wind speed and direction, as well as the outside temperature) on the effectiveness of natural ventilation in smoke exhaust is studied. The analysis consider also the internal factors such as the location of the outbreak, assumed fire curve, the size and especially the height of building, and supply diffusers’ location. Attempts are made to determine the impact of these factors on the smoke extraction.

The basic criterion for such considerations are conditions on evacuation routes during the development of a fire. A special analysis is subject to The temperature, visibility and supply air flow to the object are under special analysis.

The FDS (Fire Dynamics Simulator) software, using CFD methods, are used in studies.

Studies on measuring methodology and equipment

The Department conducts research on the methodology of measuring indoor environment conditions: temperature, humidity, pressure, air velocity, gasses concentration and heat flux.

Atypical and high-specialized measuring systems are constructed. Research on the measurement results' processing and the dynamic adjustment of recorded measurements are also performed.

 

Studies on the dust removal technology

The Department conducts research on the measurement methods of the dust emission in waste gases and dust markers. The works include topics of:

  • the suction accuracy characteristics of probes in dust collection,
  • the characteristics of the gas velocity measurement in the channel with pressure and ratational sensors,
  • assessing the measurement accuracy of mass flow and volume flow of dust/gas in the gravimetric measurement,
  • evaluation of the screening analysis accuracy,
  • structural analysis of the metrological impactors.

The Department performs also research on local exhausts (taking into account issues such as hermetisation of dust sources, suckers, covers, central vacuuming), as well as aerodynamic and process optimization of gas cleaning devices.