Impact of the Limited Heat Source Capacity on Indoor Temperature and Energy Consumption in Serial nZEB Residential Buildings across the Baltic Region

Abstract

This paper is dedicated to research of the impact of the limited heat source capacity on indoor temperature and energy consumption in serial nZEB residential buildings. This is an innovative aspect as it explores the potential design simplification for different locations, allowing for cost optimization and quicker construction timelines. The objective of this paper is to examine the impact of limited heat source capacity by utilizing thermal mass and optimizing the ventilation operation. Numerical results demonstrate that incorporating thermal mass increases heating energy consumption by up to 1%. The study addresses the impact of limited heating capacity on indoor temperatures and the need to manage ventilation’s impact during peak temperatures using simulation software IDA ICE. The study reveals that a limited heating capacity reduces energy consumption up to 2.6%, but may result in lower indoor temperatures. By optimizing ventilation strategies, energy consumption can be reduced from 2.4% to 4.4% compared to the suboptimal solution, and from 2.8% to 6.5% compared to the initial case. Parametric analysis reveals optimal ventilation operation change-over point at an outdoor temperature of −17 °C during winter. The research provides practical recommendations for adjusting heating schedules, selecting appropriate heating capacities and implementing optimal ventilation strategies.

A Simultaneous Usage Ratio Based on Occupant Behavior: A Case Study of Intermittent Heating in an Apartment Building in Japan

“…Based on the above, the heating load characteristics for each dwelling unit and each household composition were analyzed, and the actual situation of heating peak load was determined. In the future, it is important for the excessive design to be suppressed and the appropriate heat source equipment capacity to be selected [45]. For this purpose, it is necessary to accurately estimate the building load while considering the simultaneous usage ratio to some extent.…”

Ventilation and air conditioning design approach based on ASHRAE psychrometric chart and Mollier diagram

“…1) The intended use of the building, including the modes of use, technological processes within the premises, projected number of occupants, workplaces, and lighting. 2) Detailed insights on the thermal attributes of external boundaries and the thermal inertia of the premises' internal structures (Saleh Pascha et al, 2016;Millers et al, 2020;Borodinecs et al, 2022a;Borodinecs et al, 2022b;Metals et al, 2022;Prozuments et al, 2023;Staveckis and Zemitis, 2023).…”