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In order to clarify the actual operation effect of the comprehensive environmental performance of the existing residential buildings after the green retrofitting in the severe cold and cold zones, this paper selects the existing residential buildings of typical city in the severe cold zone as the research object, using the established evaluation method—EM-GRERB (Evaluation Method of Green Retrofitting for Existing Residential Buildings in severe cold and cold zones) and through field investigation and field measurement, the comprehensive environmental performance improvement of the project is confirmed. The results show that the degree of green retrofitting of the project is not obvious, need to further enhance the green retrofitting effect. This paper further analyzes the problems existing in the green retrofitting of the project, and puts forward the green retrofitting program, which provides a reference for the green retrofitting of the existing residential buildings in severe cold and cold zones. [ABSTRACT FROM AUTHOR]

The study starts with the analysis of the current situation of both the existing buildings and the energy sector in Egypt, analyzing the energy consumption patterns and the inefficiencies leading to these patterns, then defining the nZEB concept to familiarize the reader with its different aspects. The empirical part of the study utilizes simulation to validate the proposed guideline by applying it on an already existing residential building. The detailed steps of converting an already existing residential building to an nZEB is the final outcome of the research. [ABSTRACT FROM AUTHOR]

The surface finishes have an important role on the energy requirements of the buildings. This paper presents a new factor denominated “outside coating factor” (OCF) for an air-conditioned building and for a building without summer thermal control. It synthetically describes the climate of the location considered and can be useful for building planners for choosing the optimal outside surface finishes from thermal and energetic point of view. This factor depends on the cooling/heating degrees-day and solar radiation. For positive values of the OCF (0, +2.5), the optimal choice falls on the high solar reflectance and high infrared emissivity surface finishes, while the opposite occurs for negative values of the OCF. [ABSTRACT FROM AUTHOR]

Urban green reform of existing residential buildings is an important way to achieve totals, the control of energy consumption, the reduction target of carbon dioxide emissions per unit of GDP, and the target of green building construction. In this paper, study the existing residential buildings in cold region cities and towns, research the building basic information, household behavior, indoor thermal environment and family composition. To get the basic conditions of living buildings in the cold regions, and the factors that affects the energy consumption. Meanwhile, the paper also uses the way that simulates the annual energy consumption of existing residential buildings, get the factors of existing residential building that affects the energy consumption in cold regions, so as to provide the green transformation of the existing residential building. [ABSTRACT FROM AUTHOR]

Poor thermal comfort of indoor and low efficiency of heating system can always be found in the buildings with large energy consumption. This paper adopted a comparison method to carry on the energy consumption analysis of several control and operation regulation modes of heat metering heating system. A demonstration project in Tianjin was selected as an example to calculate the energy consumption of circulating water pumps of the secondary pipe network in different combinations of control and regulation, and carries on the comparative analysis. It is concluded that circulating water pumps will be the lowest energy consumption under the remote constant pressure control. And it points out the major problems existing in current, which is beneficial for scholars’ further study on heat metering system. [ABSTRACT FROM AUTHOR]

Abstract: This article analyzed several aspects of the present residential buildings in China''s northern heating region such as the indoor thermal environment, satisfaction degree of residents, willingness and motives for retrofit, retrofit content and retrofit effect based on a questionnaire survey. The results revealed poor indoor thermal quality and dissatisfaction of residents, and intensive willingness and obvious retrofit effects. By further clarifying the requirement and the key points of the retrofit, suggestions for promoting the retrofit of the present residential buildings in China''s northern heating region were put forward. [Copyright &y& Elsevier]