Hourly simulations of an hospital building for assessing the thermal demand and the best retrofit strategies for consumption reduction

Silenzi, Federico; Priarone, Antonella; Fossa, Marco

doi:10.1016/j.tsep.2018.01.015

Cited by 19 publications

(7 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the analysis, the most cost-effective solution was to increase exterior wall insulation. A similar approach was used in a paper by Silenzi et al [23]. The authors evaluated the energy requirements for both heating and cooling systems.…”

Section: Energy Simulationmentioning

confidence: 99%

Hotel Adapted to the Requirements of an nZEB Building—Thermal Energy Performance and Assessment of Energy Retrofit Plan

Borowski

2022

Energies

View full text Add to dashboard Cite

Recently, emissions and the energy use of the building and construction sector globally increased. Therefore, energy retrofit processes and reducing the energy consumption of buildings are increasingly often discussed by the academic community, industry, and end-users. The application of high-performance technologies and highly insulating materials results in a low energy demand in newly constructed buildings. A crucial challenge is to reduce energy consumption in existing buildings. The article presents an energy analysis of the reconstruction of a historic building adapted to hotel functionality. Based on the available information on the design of the facility, and the annual demand for cooling and heating energy, simulations of the energy performance were carried out. The proposals to exchange the heat source and replace the existing systems were simulated and assessed. Three different retrofit options were analyzed, including the replacement of the air handling unit (variant 1—v1), bathroom fixtures (v2), and, in the last scenario analyzed (v3), the above-mentioned activities and the usage of tri-generation units. As the results show, such solutions allow for the reduction in final energy consumption of 20%, to 73% regarding the baseline variant.

show abstract

Section: Energy Simulationmentioning

confidence: 99%

Hotel Adapted to the Requirements of an nZEB Building—Thermal Energy Performance and Assessment of Energy Retrofit Plan

Borowski

2022

Energies

View full text Add to dashboard Cite

show abstract

“…No general efficiency relationship was available in the boiler datasheet provided by the manufacturer, which listed no more than a few efficiency values at its maximum load and specified supply and return water temperatures. For that reason, the efficiency curve was defined according to a model that includes both return temperature (T) and load (y) as independent variables [35]: ( 2 ) • T^2 + a ( 3 ) • T 3 + a ( 4 ) • T^4 + a ( 5 ) • y + a ( 6 ) • T • y + a ( 7 ) • y • T^2 + a ( 8 )…”

Section: Apr14 May14 Jun14 Jul14 Aug14 Sep14 Oct14 Nov14 Dec14 Jan15 mentioning

confidence: 99%

“…In this process, the selection of the most suitable simulation tool is of utmost importance. Indeed, dynamic simulation tools should be developed, so that potential energy and money savings under real conditions of use can be estimated [5]. These outcomes will then be used to support cost-benefit analyses, where several prospective retrofit scenarios are compared to select the best one.…”

Section: Introductionmentioning

confidence: 99%

HVAC System

2018

View full text Add to dashboard Cite

This chapter focuses on advanced tools for transient energy simulation of existing buildings. Budget constraints often hinder the possibility of implementing large-scale retrofit projects. As a consequence, designers must work out low-cost renovation, which asks for a deep knowledge of the current state of the buildings. Furthermore, the performances of heating plants in existing buildings can be enhanced through the improvement of the control of the system. These types of retrofit actions can be carried out with a limited budget, but asks for the availability of very accurate transient energy simulation tools, which can compare the current and the renovated scenarios. On top of them, cost-benefit analyses can be developed. In this chapter, a model of a small hospital is developed in the Dymola/Modelica environment. The high flexibility of the transient simulation model and the very good agreement between numerical estimations and measurements are shown. Then, one scenario regarding enhanced regulation of the heating system by means of a customized ambient temperature control system is developed, and the expected energy savings are estimated.

show abstract

“…One of the main responsible sectors is the buildings one, with approximately 40% of energy consumption and 36% of CO 2 emissions in the EU [1]. In this framework, it is easy to understand why energy dynamic simulations of buildings are of great importance and can be used to either develop innovative solutions for new buildings or to evaluate different retrofit interventions to enhance the energy performance of existing ones [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Modelling Heat Pumps with Variable EER and COP in EnergyPlus: A Case Study Applied to Ground Source and Heat Recovery Heat Pump Systems

2020

Self Cite

View full text Add to dashboard Cite

Dynamic energy modelling of buildings is a key factor for developing new strategies for energy management and consumption reduction. For this reason, the EnergyPlus software was used to model a near-zero energy building (Smart Energy Buildings, SEB) located in Savona, Italy. In particular, the focus of the present paper concerns the modeling of the ground source water-to-water heat pump (WHP) and the air-to-air heat pump (AHP) installed in the SEB building. To model the WHP in EnergyPlus, the Curve Fit Method was selected. Starting from manufacturer data, this model allows to estimate the COP of the HP for different temperature working conditions. The procedure was extended to the AHP. This unit is a part of the air-handling unit and it is working as a heat recovery system. The results obtained show that the HP performance in EnergyPlus can closely follow manufacturer data if proper input recasting is performed for EnergyPlus simulations. The present paper clarifies a long series of missed information on EnergyPlus reference sources and allows the huge amount of EnergyPlus users to properly and consciously run simulations, especially when unconventional heat pumps are present.

show abstract

Hourly simulations of an hospital building for assessing the thermal demand and the best retrofit strategies for consumption reduction

Cited by 19 publications

References 14 publications

Hotel Adapted to the Requirements of an nZEB Building—Thermal Energy Performance and Assessment of Energy Retrofit Plan

Hotel Adapted to the Requirements of an nZEB Building—Thermal Energy Performance and Assessment of Energy Retrofit Plan

HVAC System

Modelling Heat Pumps with Variable EER and COP in EnergyPlus: A Case Study Applied to Ground Source and Heat Recovery Heat Pump Systems

Contact Info

Product

Resources

About