FEASIBILITY ANALYSIS OF INTEGRATED SYSTEM OF HEAT RECOVERY COGENERATION LOOP AND ELECTRIC HEAT PUMP WITH DETAILED BUILDING ENERGY SIMULATION

2010 ◽  
Vol 18 (01) ◽  
pp. 31-41
Author(s):  
DONG-HYUN SEO ◽  
JAE-YOON KOH ◽  
YOOL PARK
Keyword(s):  
Life Cycle ◽  
Economic Analysis ◽  
Heat Pump ◽  
Life Cycle Cost ◽  
Building Energy ◽  
Energy Simulation ◽  
Building Energy Simulation ◽  
Pump System ◽  
Heat Pump System ◽  
Cogeneration System

Recent energy and economic analysis of a cogeneration system has been implemented by a manual calculation that is based on monthly thermal loads of buildings. In this study, a cogeneration system modeling validation with a detail building energy simulation, eQUEST, for a building energy and cost prediction has been implemented. By analyzing the hourly building electricity and thermal loads, it enables designers to decide proper cogeneration system capacity and to estimate more reliable building energy consumption. eQUEST also verified economical and environmental benefits when the heat pump system is integrated with the cogeneration system because the mechanical system configuration benefits from the high efficiency heat pump system while avoiding the building electricity demand increase. Economic analysis such as LCC (Life Cycle Cost) method is carried out to verify economical benefits of the system by applying actual utility rates of KEPCO (Korea Electricity Power COmpany) and KOGAS (KOrea GAS company). As results, the proposed system consumed approximately 40% less energy than the Alt-2 in terms of source energy. LCC analysis results also show that the proposed system could save about 10–14% of energy cost during the life cycle compared to the Alt-1 and Alt-2. It could save 6–7% of the total life cycle cost and it is equivalent to around 1–1.3 billion Won in cost.

scholarly journals Energy performance and life cycle cost assessments of a photovoltaic/thermal assisted heat pump system

Energy ◽  
2020 ◽  
Vol 206 ◽  
pp. 118108
Author(s):  
Yuanlong Cui ◽  
Jie Zhu ◽  
Stamatis Zoras ◽  
Yaning Qiao ◽  
Xin Zhang
Keyword(s):  
Life Cycle ◽  
Heat Pump ◽  
Life Cycle Cost ◽  
Energy Performance ◽  
Pump System ◽  
Heat Pump System

scholarly journals Integrated Building Energy Simulation–Life Cycle Assessment (BES–LCA) Approach for Environmental Assessment of Agricultural Building: A Review and Application to Greenhouse Heating Systems

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1230
Author(s):  
Cristina Decano-Valentin ◽  
In-Bok Lee ◽  
Uk-Hyeon Yeo ◽  
Sang-Yeon Lee ◽  
Jun-Gyu Kim ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impact ◽  
Greenhouse Gas ◽  
Heat Pump ◽  
Greenhouse Gas Emission ◽  
Building Energy ◽  
Energy Simulation ◽  
Building Energy Simulation ◽  
Heating Systems

A substantial reduction in the environmental impacts related to the construction and operation of agricultural buildings is needed to adapt to the continuing development of agriculture. The life cycle assessment (LCA) is a methodology used to quantify the environmental impact of different processes involved in the production and therefore has been increasingly applied to assess the environmental burden. However, most LCA-related research studies have focused on the overall environmental impact of the entire system without considering the energy load of the agricultural buildings. By integrating the LCA tool with other design tools such as the building energy simulation (BES), the identification of environmental hotspots and the mitigation options become possible during the design process. Thus, the objective of the paper was to identify the current integration approaches used to combine BES and LCA results to assess the environmental impact of different heating systems such as absorption heat pump (AHP) using energy from thermal effluent, electricity-powered heat pump and kerosene-powered boilers used in a conventional multi-span Korean greenhouse. The assessment result revealed that the environmental impact caused using a kerosene-powered boiler is largest in terms of the acidification potential (AP), global warming potential (GWP) and Eutrophication Potential (EP) of 1.15 × 100 kg SO2-eq, 1.13 × 102 kg CO2-eq and 1.62 × 10−1 kg PO4-eq, respectively. Detailed analysis of the result showed that the main contributor for greenhouse gas emission was caused by the type, amount and source of energy used to heat the greenhouse, which contributed to a maximum of 86.59% for case 1, 96.69% for case 2 and a maximum of 96.47% for case 3, depending on the type of greenhouse gas being considered.

scholarly journals Analysis of Thermal Energy Collection From Precast Concrete Roof Assemblies

2007 ◽  
Author(s):  
Ashley B. Abbott ◽  
Michael W. Ellis
Keyword(s):  
Life Cycle ◽  
Solar Energy ◽  
Heat Pump ◽  
Life Cycle Cost ◽  
Precast Concrete ◽  
Economic Feasibility ◽  
Water Heating ◽  
Domestic Water ◽  
Pump System ◽  
Heat Pump System

The development of precast concrete housing systems provides an opportunity to easily and inexpensively incorporate solar energy collection by casting collector tubes into the roof structure. A design is presented for a precast solar water heating system used to aid in meeting the space and domestic water heating loads of a single-family residence. A three-dimensional transient collector model is developed to characterize the precast solar collector’s performance throughout the day. The model describes the collector as a series of segments in the axial direction connected by a fluid flowing through an embedded tube. Each segment is represented by a two-dimensional solid model with top boundary conditions determined using a traditional flat plate solar collector model. The precast collector is coupled to a series solar assisted heat pump system and used to meet the heating needs of the residence. The performance of the proposed system is compared to the performance of a typical air-to-air heat pump. Using the system model, various designs and operating parameters were analyzed to determine a set of near optimal design values. The annual performance of the near optimal system was evaluated to determine the energy and cost savings for applications in Atlanta, GA and Chicago, IL. In addition, a life cycle cost was completed to determine the economic feasibility of the proposed system. The results of the annual study show that capturing solar energy using the precast collector and applying the energy through a solar assisted heat pump can reduce the electricity required for heating by more than 50 percent in regions with long heating seasons such as Chicago. The life cycle cost analysis shows that the energy savings justifies the increase in initial cost in locations with long heating seasons but that the system is not economically attractive in locations with shorter heating seasons.

scholarly journals Life cycle cost analysis of different residential heat pump systems

2020 ◽  
Vol 207 ◽  
pp. 01014
Author(s):  
Nadezhda Doseva ◽  
Daniela Chakyrova
Keyword(s):  
Energy Efficiency ◽  
Life Cycle ◽  
Heat Pump ◽  
Life Cycle Cost ◽  
Residential Buildings ◽  
Energy Performance ◽  
Coefficient Of Performance ◽  
Pump System ◽  
Heat Pump System ◽  
Heating And Cooling

Nowadays, the application of air-source heat pumps for heating and cooling in residential buildings has been increased significantly. The main occasion for this is the accessibility of a heat source for these devices - the external air. Nevertheless, the increase of the energy efficiency of the air source heat pump systems is a difficult design problem because their capacity and performance are a function of the dynamically changing parameters of the outdoor air. Because of that, the main aim of this study is to develop an approach for choosing a structural scheme of an air-to-water heat pump system under specific climatic conditions. The considered systems are monovalent, bivalent-parallel and bivalent-alternative heat pump systems. In the current paper is conducted a dynamic energy modeling of heating and cooling demand of a typical residential building situated in Varna, Bulgaria and applying the bin temperature data. It is assessed the effect of the heat pump capacity over the annual and seasonal energy performance of the heat pump systems. It is established the effect of the bivalent temperature, cut-off temperature and on-off cycles duration on rates of the criteria for techno-economic assessment. The seasonal coefficient of performance (SCOP), seasonal energy efficiency rate (SEER) and life cycle costs (LCC) of the analyzed heat pump systems are adopted as assessment parameters.

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