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The article presents an assessment of the suitability of the standards adopted by the European Committee for the calculation of the energy characteristics of domestic hot water supply systems (DHW) and the search for optimal solutions (methods and default values) for the Latvian conditions. The estimation of thermal energy consumption in apartment buildings for heating and hot water supply systems, including: estimation of the volume of hot water and the required amount of energy; estimation of heat losses in the hot water distribution system during heating and non-heating; evaluation of auxiliary energy of hot water system. A method that meets the standards of the European Committee, suitable for Latvian conditions, is proposed.
Представлена оценка пригодности стандартов, принятых Европейским комитетом, для расчета энергетических характеристик бытовых систем горячего водоснабжения (ГВС) и поиск оптимальных решений (методов и значений по умолчанию) для латвийских условий. Исследована оценка потребления тепловой энергии в многоквартирных домах для систем отопления и горячего водоснабжения, в том числе: оценка объема ГВС и необходимого количества энергии; оценка потерь тепла в системе распределения горячей воды во время нагрева и ненагрева; оценка вспомогательной энергии системы ГВС. Предложен метод, соответствующий стандартам Европейского комитета, подходящий для латвийских условий.
Table of Contents
- Energy performance of domestic hot water systems
- Энергетические характеристики систем бытовой горячей воды
- Introduction
- Materials and Methods
- Results and discussion
- Assessment of energy performance of the DHW systems of the apartment buildings
- Characteristics of the domestic water consumption
- Assessment of energy consumption for DHW subsystems
- Calculation of the heat energy losses based on DHW pipes actual physical characteristics
- The breakdown of heat loss by DHW circulation loop sections
- The assessment of the auxiliary energy for DHW system
- Assessment of energy performance of the DHW systems of the apartment buildings
- Discussion
- Recommendations for energy performance calculation model for the DHW system
- Economic impact of DHW system heat loss
- Conclusions
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