Cement Energy Environment

49 Working in a window-less office, even under adequate light conditions, and working in an office with a view, are totally different experiences. Abundant scientific studies show positive impacts of the latter on mood and job satisfaction. A well-designed lighting system must provide adequate illuminationto ensure safety and enable movement, contribute to visual comfort and facilitate visual performance and color perception. Monitored parameters include quantitative physical measures of the luminous environment (illuminance, luminance, daylight provision and glare) and qualitative aspects of vision(distribution, uniformity, color rendering, the spectral composition of radiation). Indoor Air Quality (IAQ) directly affect over occupant health, comfort, and productivity significantly. Serious health impacts resulting from poor IAQ include Legionnaires’ disease, lung cancer from radon exposure, and carbon monoxide poisoning. More widespread health impacts include increased allergy and asthma from exposure to indoor pollutants (particularly those as associated with building dampness and mold), colds and other infectious diseases that are transmitted through the air and “sick building syndrome” symptoms due to elevated indoor pollutant levels as well as other indoor environmental conditions. The two fundamental connections include the impact of ventilation on indoor pollutant levels and the impact on heating and cooling energy (sensible and latent). Given equation expresses the relationship between the outdoor air ventilation rate Q and the indoor pollutant concentration Cin for a single zone under steady-state conditions Thermal comfort, indoor air quality and visual comfort have to be taken into consideration while designing an energy efficient and healthy building environment, as the overall goal is not just the deployment of such environments but also their overall acceptance by their occupants. The objective of developing low energy consuming or low carbon buildings is to increase the sustainability of the built environment while ensuring the long-term well-being of occupants.However, for an existing it is challenging to modify and redesign a building to meet thermal comfort, visual comfort and indoor air quality for low energy consumption. The field case studyfindings for energy use implications and adaptive models are discussed to develop clear depiction. There have been a number of studies investigating the energy use implications in the built environment. In this paper, we are briefly discussing measures focusing on performance assessment and Air Quality Built environment and energy efficiency where Cout is the outdoor pollutant concentration, S is the indoor contaminant source strength, and Rfac is the rate at which the contaminant is removed by filtration or air cleaning. This relationship shows that as the ventilation rate increases, the indoor concentration decreases (assuming S>Rfac). The amount of energy E required to heat (or cool) and move the ventilation air is expressed as where p is the air density, Cp is the specific heat of air, Cl is the air latent heat factor, ∆T is the temperature difference between indoor and outdoor air, W is humidity ratio difference. Efan accounts for the energy associated with equipment used to move the ventilation air (e.g., fans), and Ehr is the energy recovered by heat recovery equipment. Equation shows that as the ventilation rate increases, the energy required to heat (cool) the outdoor air also increases, but it also implies flexibility in how the air is delivered and through the use of heat recovery. approaches to improveenergy efficiency of HVAC system in facility. a. Sustainability of the Built Environment Sustainable planning for a commercial building derived from thermal modeling of a particular site and the built environment. Several factors taken into account; sunlight path analysis, orientation of building, climatic conditions. The building shape and orientation are optimised reduce the heat tominimise the delta temperature outside and inside of the building thereby minimizing overall HVAC requirement. In a new building, planned and designed external cladding, insulation and glazing minimizes heat gain/ loss, increase natural ventilation and day light saving in and around the building.