Heating, Ventilation and Air Conditioning in Smart Energy
... The status in Norway today is a discussion about direct electrical heating vs. central heating systems with water as energy carrier. The main point is the low heat load vs. the higher cost for the central heating system. For local and central heating systems a numerous of components and solutions ar ...
... The status in Norway today is a discussion about direct electrical heating vs. central heating systems with water as energy carrier. The main point is the low heat load vs. the higher cost for the central heating system. For local and central heating systems a numerous of components and solutions ar ...
The building concept - BRE projects website
... global presentation of the buildings (4p./building) contents: building description - ventilation strategy and technology winter and summer monitoring results - conclusions \Reports \Monitoring Reports \Detailed Reports\be2det.pdf detailed reports of all 19 monitoring campaigns (20p./campaign ...
... global presentation of the buildings (4p./building) contents: building description - ventilation strategy and technology winter and summer monitoring results - conclusions \Reports \Monitoring Reports \Detailed Reports\be2det.pdf detailed reports of all 19 monitoring campaigns (20p./campaign ...
Controlling Condensation in Steep Slope Metal Roofing Systems
... building insulation. The practice is applicable for both wall and roofing applications. For most roofing applications, the proper location would be above the building’s drywall ceiling. The building owner is advised to contact a design professional to determine the proper design for and placement of ...
... building insulation. The practice is applicable for both wall and roofing applications. For most roofing applications, the proper location would be above the building’s drywall ceiling. The building owner is advised to contact a design professional to determine the proper design for and placement of ...
25 7. PASSIVE CLIMATE CONTROL FOR CULTURAL
... and overnight temperatures may well be below comfort levels. When the average temperature for the whole day is in an acceptable range, and if the building achieves a small enough ‘temperature swing’, little other climate modification may be necessary. Clearly, in the under-heated climates, interiors ...
... and overnight temperatures may well be below comfort levels. When the average temperature for the whole day is in an acceptable range, and if the building achieves a small enough ‘temperature swing’, little other climate modification may be necessary. Clearly, in the under-heated climates, interiors ...
Experience on Commissioning of Heating/Cooling System and
... The walls and the ceiling are finished with non-form-aldehyde finishing materials. During heating and cooling seasons, the minimum volume of outdoor air is introduced, and the windows are planned to be closed in principle. However, either natural ventilation by opening the window or forced ventilati ...
... The walls and the ceiling are finished with non-form-aldehyde finishing materials. During heating and cooling seasons, the minimum volume of outdoor air is introduced, and the windows are planned to be closed in principle. However, either natural ventilation by opening the window or forced ventilati ...
Integration of the natural cross ventilation in the CFD
... Nowadays, a lot of energy is spent for air-conditioning in the cities for offices and privatehousing. A good knowledge of the urban climatology around the buildings could allow using the wind for natural ventilation. UrbaWind is an automatic computational fluid dynamics (CFD) code developed in 2008 ...
... Nowadays, a lot of energy is spent for air-conditioning in the cities for offices and privatehousing. A good knowledge of the urban climatology around the buildings could allow using the wind for natural ventilation. UrbaWind is an automatic computational fluid dynamics (CFD) code developed in 2008 ...
Ventilation: The System Stabilizer
... In warm weather, ventilation helps cool the attic by minimizing transfer of heat from the roof to the attic. This protects against premature failure of roof materials and high cooling costs. Tests show that proper ventilation can effectively reduce shingle temperatures. Over time, it can help yield ...
... In warm weather, ventilation helps cool the attic by minimizing transfer of heat from the roof to the attic. This protects against premature failure of roof materials and high cooling costs. Tests show that proper ventilation can effectively reduce shingle temperatures. Over time, it can help yield ...
EPA`s Indoor Air Quality Tools for Schools Program
... • Controlling pollutants by identifying and eliminating the source. The TFS walkthrough checklist helps you identify them. • Gauge pressures in your building with a tissue. Or an IAQ professional can use a simple smoke tube. The TFS ventilation checklist shows you how. •Identify and eliminate pathwa ...
... • Controlling pollutants by identifying and eliminating the source. The TFS walkthrough checklist helps you identify them. • Gauge pressures in your building with a tissue. Or an IAQ professional can use a simple smoke tube. The TFS ventilation checklist shows you how. •Identify and eliminate pathwa ...
Passive House Standard Video Tutorial
... The Passive House standard is a specific construction standard for buildings with good comfort conditions during winter and summer irrespective of the climate in which they are located. Typically this includes optimised insulation levels, high performance triple glazed windows (typically the weakest ...
... The Passive House standard is a specific construction standard for buildings with good comfort conditions during winter and summer irrespective of the climate in which they are located. Typically this includes optimised insulation levels, high performance triple glazed windows (typically the weakest ...
Cooling guidelines PL
... A typical feture that differs passive buildings from the traditional ones is the way of heating or cooling. This is because passive buildings are not equipped with heating or cooling installations that can usually be found in typical buildings. Cooling and heating is usually carried out along with m ...
... A typical feture that differs passive buildings from the traditional ones is the way of heating or cooling. This is because passive buildings are not equipped with heating or cooling installations that can usually be found in typical buildings. Cooling and heating is usually carried out along with m ...
Investigating Performance of Windscop Installed on Towers in Arid
... analyzed. In this plan, the pop-up doors and solar chimneys are applied for speed up the wind flow, and some especial canals are also applied for directing local cool air downwards and hot air outwards. The Commerzbank plan was applied in Frankfort, Germany, which was designed by Norman Foster (Figu ...
... analyzed. In this plan, the pop-up doors and solar chimneys are applied for speed up the wind flow, and some especial canals are also applied for directing local cool air downwards and hot air outwards. The Commerzbank plan was applied in Frankfort, Germany, which was designed by Norman Foster (Figu ...
The fundamental principles of radiant heat barrier
... radiant heat barrier / reflective foil Reflective insulation materials work on a different concept than conventional bulk insulation like rigid foam boards or fibrous blankets. Unlike conventional bulk insulation, reflective insulation has very low emittance values “e-values” (typically 0.03, compar ...
... radiant heat barrier / reflective foil Reflective insulation materials work on a different concept than conventional bulk insulation like rigid foam boards or fibrous blankets. Unlike conventional bulk insulation, reflective insulation has very low emittance values “e-values” (typically 0.03, compar ...
the effect of glazed fenestration area and natural ventilation on
... saving implications for its users, but also because it helps preserve valuable resources in our planet (La Roche, P., Liggett, R, 2001). Unfortunately, new building envelope designs are developed to meet the client's requirements without much concern to the local climate and with no objective to con ...
... saving implications for its users, but also because it helps preserve valuable resources in our planet (La Roche, P., Liggett, R, 2001). Unfortunately, new building envelope designs are developed to meet the client's requirements without much concern to the local climate and with no objective to con ...
Natural Ventilation of Tall Buildings – Options and Limitations
... impose limits on the width to height ratio of the building. It is commonly assumed that crossflow ventilation of a space is only effective for W/h < 5, where W and h are respectively the width and height of the space. If W/h is too large, some areas of the space may be poorly ventilated, by virtue o ...
... impose limits on the width to height ratio of the building. It is commonly assumed that crossflow ventilation of a space is only effective for W/h < 5, where W and h are respectively the width and height of the space. If W/h is too large, some areas of the space may be poorly ventilated, by virtue o ...
18205 - Inland Diamond
... all windows and doors. Use only with a cross ventilation of moving fresh air across the work area. If strong odor is noticed or you experience slight dizziness, headache nausea, or eyewatering – Stop – ventilation is inadequate. Leave area immediately. Respiratory Protection: For OSHA controlled wor ...
... all windows and doors. Use only with a cross ventilation of moving fresh air across the work area. If strong odor is noticed or you experience slight dizziness, headache nausea, or eyewatering – Stop – ventilation is inadequate. Leave area immediately. Respiratory Protection: For OSHA controlled wor ...
View PDF
... what was unusual about these heat exchangers is how they worked. These units, called Reverse Flow Heat Recovery Ventilators, push the warm exhaust air over a series of thin plates that have a high mass, which warms the plates. Simultaneously, they draw in cold ventilation air across a similar series ...
... what was unusual about these heat exchangers is how they worked. These units, called Reverse Flow Heat Recovery Ventilators, push the warm exhaust air over a series of thin plates that have a high mass, which warms the plates. Simultaneously, they draw in cold ventilation air across a similar series ...
Aalborg Universitet Heiselberg, Per Kvols
... not feel uncomfortable in the indoor environment. In Montreal, Canada, the outdoor air temperature is expected to show a diurnal temperature difference of at least 10 °C during the months of April to October [3]. These months include the shoulder seasons and summer season, and are when natural venti ...
... not feel uncomfortable in the indoor environment. In Montreal, Canada, the outdoor air temperature is expected to show a diurnal temperature difference of at least 10 °C during the months of April to October [3]. These months include the shoulder seasons and summer season, and are when natural venti ...
Airflow in High-rise Multi-unit Residential Buildings with Respect to
... Airflow in to, out of, and within buildings is a fundamental factor of indoor air quality, comfort, durability, and energy consumption. Multi-unit residential buildings are uniquely complex in this respect due to a number of design factors which differentiate them from other building types including ...
... Airflow in to, out of, and within buildings is a fundamental factor of indoor air quality, comfort, durability, and energy consumption. Multi-unit residential buildings are uniquely complex in this respect due to a number of design factors which differentiate them from other building types including ...
ENERGY CONSERVATION STRATEGIES FOR HVAC SYSTEMS
... The performance of the VVVFD systems is dependent on the location and accuracy of the sensors which have to give feedback signals to the VVVFD systems on variations in the load demand. Besides energy saving, the VVVFD system will result in reduction in mechanical wear and tear as the motors will be ...
... The performance of the VVVFD systems is dependent on the location and accuracy of the sensors which have to give feedback signals to the VVVFD systems on variations in the load demand. Besides energy saving, the VVVFD system will result in reduction in mechanical wear and tear as the motors will be ...
Understanding and Applying ASHRAE Standards - HVAC-Talk
... classification.1” These are the safest ratings given in the Standard to any refrigerant and are the same ratings are given to refrigerants R-22, R-134a, and R-407c. Of primary concern is the displacement of all oxygen in a room that could lead to occupant asphyxiation in the event of a catastrophic ...
... classification.1” These are the safest ratings given in the Standard to any refrigerant and are the same ratings are given to refrigerants R-22, R-134a, and R-407c. Of primary concern is the displacement of all oxygen in a room that could lead to occupant asphyxiation in the event of a catastrophic ...
Central Atrium - NSW Department of Education
... design at concept stage and be part of the overall design philosophy. When designing it is important to consider natural lighting in conjunction with natural ventilation, landscaping and air flow. To simply consider natural ventilation without considering solar heat gain and daylighting is not suffi ...
... design at concept stage and be part of the overall design philosophy. When designing it is important to consider natural lighting in conjunction with natural ventilation, landscaping and air flow. To simply consider natural ventilation without considering solar heat gain and daylighting is not suffi ...
Why Houses Need Mechanical Ventilation Systems
... A less-than-ideal demand-controlled ventilation system would have at least one sensor. For example, many ventilation systems are controlled by dehumidistats: the system operates until the dehumidistat has determined that the humidity in the house is at a safe level. Excess humidity is one of the mai ...
... A less-than-ideal demand-controlled ventilation system would have at least one sensor. For example, many ventilation systems are controlled by dehumidistats: the system operates until the dehumidistat has determined that the humidity in the house is at a safe level. Excess humidity is one of the mai ...
University of Hertfordshire Law Court Building
... welcomed the detailed analysis we provided. I ...
... welcomed the detailed analysis we provided. I ...
Ventilation (architecture)
Ventilating (the V in HVAC) is the process of ""processing"" or replacing air in any space to provide high indoor air quality (i.e. to control temperature, replenish oxygen, or remove moisture, odors, smoke, heat, dust, airborne bacteria and carbon dioxide). Ventilation is used to remove unpleasant smells and excessive moisture, introduce outside air, to keep interior building air circulating, and to prevent stagnation of the interior air.Ventilation includes both the exchange of an air to the outside as well as circulation of air within the building. It is one of the most important factors for maintaining acceptable indoor air quality in buildings. Methods for ventilating a building may be divided into mechanical/forced and natural types.""Mechanical"" or ""forced"" ventilation is used to control indoor air quality. Excess humidity, odors, and contaminants can often be controlled via dilution or replacement with outside air. However, in humid climates much energy is required to remove excess moisture from ventilation air.Ventilation increases the energy needed for heating or cooling, however heat recovery ventilation can be used to mitigate the energy consumption. This involves heat exchange between incoming and outgoing air. Energy recovery ventilation additionally includes exchange of humidity.Kitchens and bathrooms typically have mechanical exhaust to control odors and sometimes humidity. Kitchens have additional problems to deal with such as smoke and grease (see kitchen ventilation). Factors in the design of such systems include the flow rate (which is a function of the fan speed and exhaust vent size) and noise level. If ducting for the fans traverse unheated space (e.g., an attic), the ducting should be insulated as well to prevent condensation on the ducting. Direct drive fans are available for many applications, and can reduce maintenance needs.Ceiling fans and table/floor fans circulate air within a room for the purpose of reducing the perceived temperature because of evaporation of perspiration on the skin of the occupants. Because hot air rises, ceiling fans may be used to keep a room warmer in the winter by circulating the warm stratified air from the ceiling to the floor. Ceiling fans do not provide ventilation as defined as the introduction of outside air.Natural ventilation is the ventilation of a building with outside air without the use of a fan or other mechanical system. It can be achieved with openable windows or trickle vents when the spaces to ventilate are small and the architecture permits. In more complex systems warm air in the building can be allowed to rise and flow out upper openings to the outside (stack effect) thus forcing cool outside air to be drawn into the building naturally through openings in the lower areas. These systems use very little energy but care must be taken to ensure the occupants' comfort. In warm or humid months, in many climates, maintaining thermal comfort solely via natural ventilation may not be possible so conventional air conditioning systems are used as backups. Air-side economizers perform the same function as natural ventilation, but use mechanical systems' fans, ducts, dampers, and control systems to introduce and distribute cool outdoor air when appropriate.