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.

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

Experimental Study of Heating-Cooling Combined Ground Source Heat Pump System with Horizontal Ground Heat Exchanger

2011 ◽  
Vol 374-377 ◽  
pp. 398-404 ◽  
Author(s):  
Ying Ning Hu ◽  
Ban Jun Peng ◽  
Shan Shan Hu ◽  
Jun Lin
Keyword(s):  
Heat Exchanger ◽  
Heat Exchange ◽  
Heat Pump ◽  
Hot Water ◽  
Coefficient Of Performance ◽  
Ground Heat Exchanger ◽  
Pipe Length ◽  
Pump System ◽  
Heat Pump System ◽  
Heating And Cooling

A hot-water and air-conditioning (HWAC) combined ground sourse heat pump(GSHP) system with horizontal ground heat exchanger self-designed and actualized was presented in this paper. The heat transfer performance for the heat exchanger of two different pipe arrangements, three layers and four layers, respectively, was compared. It showed that the heat exchange quantity per pipe length for the pipe arrangement of three layers and four layers are 18.0 W/m and 15.0 W/m. The coefficient of performance (COP) of unit and system could remain 4.8 and 4.2 as GSHP system for heating water, and the COP of heating and cooling combination are up to 8.5 and 7.5, respectively. The power consumption of hot-water in a whole year is 9.0 kwh/t. The economy and feasibility analysis on vertical and horizontal ground heat exchanger were made, which showed that the investment cost per heat exchange quantity of horizontal ground heat exchanger is 51.4% lower than that of the vertical ground heat exchanger, but the occupied area of the former is 7 times larger than the latter's.

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.

Photovoltaic thermal collector assisted heat pumps using environment-friendly working fluids

2020 ◽  
pp. 095440892094736
Author(s):  
AA Ammar ◽  
K Sopian ◽  
M Mohanraj
Keyword(s):  
Heat Pump ◽  
Energy Performance ◽  
Heat Pumps ◽  
Payback Period ◽  
Photovoltaic System ◽  
Coefficient Of Performance ◽  
Photovoltaic Module ◽  
Pump System ◽  
Heat Pump System ◽  
Thermal Evaporator

In this research, a photovoltaic-thermal collector assisted heat pump has been developed and tested its performance under the tropical climatic conditions of Malaysia. The refrigerants such as, R134a and R1234yf were selected based on its thermodynamic and thermo-physical properties. The temperature of the photovoltaic module was theoretically predicted under the influence of tube diameter, tube spacing and refrigerant mass flow rate. Further, the energy performance of the photovoltaic-thermal evaporator and the heat pump system are investigated experimentally. Finally, the economical feasibility of the photovoltaic-thermal collector evaporator was assessed for the period of 20 years. The results showed that, the tube spacing and diameter of the copper tubes used in the photovoltaic-thermal evaporator/collector using R134a and R1234yf were optimized to 80 mm and 12.7 mm, respectively. It was observed that, during the clear sunny day, the average photovoltaic module temperature was reduced to 30.9 °C under the influence of panel cooling using refrigerant. The output of the panel was enhanced by 21%–44% with increase in solar radiation from 400 W/m2 to 1000 W/m2. The coefficient of performance of the heat pump was varied from 4.8 to 6.84 with an average coefficient of performance of 5.8 during clear sunny days. The life cycle economic analysis indicated that, the photovoltaic-thermal collector evaporator assisted heat pump has a payback period of 3 years, whereas the reference photovoltaic system has a payback period of 8 years.

Environmental Evaluation of Different Heating Systems

2013 ◽  
Vol 864-867 ◽  
pp. 2156-2160
Author(s):  
Cheng Min Chen ◽  
Min Xu ◽  
Rong Feng Sun ◽  
Xiao Xu Fan
Keyword(s):  
Waste Water ◽  
Life Cycle ◽  
Heat Pump ◽  
Life Cycle Analysis ◽  
Residential Buildings ◽  
Renewable Resource ◽  
Resource Consumption ◽  
Pump System ◽  
Heat Pump System ◽  
Heating Systems

This study compares environmental impact of different heating systems with life cycle analysis, and get out if heat pump system has advantage in replacing boiler heating systems. Systems energy use are compared in one-year operation phase for residential buildings located in Tianjin city, including waste water heat pump system, coal boiler system and gas boiler system. In order to analyzed the environment performance of heat pump system in different conditions. The power structure impact to heat pump systems is analyzed using life cycle analysis method. The results indicate that with COP=4, even if 100% coal power is used, heat pump has advantage in the most impact factors, and if more clean power is used, the environment impact in heat pump system will be reduced obviously. The result also shows that waste water use in heat pump system impact the result little for its small quantity. Nomenclature GW, Global Warming; NRC: Non-renewable Resource Consumption; OD: Ozone Depletion; ACI, Acidification; EUT, Eutrophication; SPO, Synthesis of photochemical ozone; SW, Solid Waste; HW, Hazardous Waste; SD, Smoke and Dust. RC: Renewable Resource Consumption

The Performance Improvements of a Ground-Coupled Heat Pump System for both Building Heating and Cooling Modes

2011 ◽  
Vol 354-355 ◽  
pp. 807-810 ◽  
Author(s):  
Zi Shu Qi ◽  
Qing Gao ◽  
Yan Liu ◽  
Y.Y. Yan ◽  
Jeffrey D. Spitler
Keyword(s):  
Heat Pump ◽  
Temperature Response ◽  
Energy Performance ◽  
Coefficient Of Performance ◽  
Fluid Temperature ◽  
Time Step ◽  
Pump System ◽  
Heating And Cooling ◽  
Ground Coupled Heat Pump ◽  
Cooling Loads

The objective of the paper is to describe the performance of ground-coupled heat pump (GCHP) system in 20 years. A mathematical model for simulation of GCHP system is built based on long time-step Eskilson’s theory. The design methodology is based on a simulation that predicts the temperature response of the ground heat exchanger (GHE) to monthly heating and cooling loads and monthly peak heating and cooling demands over a number of years. The temperature response also has a secondary impact on the predicted energy consumption of the system, as the coefficient of performance (COP) of the heat pump varies with entering fluid temperature. This paper presents GCHP system can achieve better energy performance in building that heating and cooling loads are balanced all the year round. It is illustrated by performing a GHE for a 300 m2 building located in Changchun, China.

Energy Analysis and Optimization of a Water-Loop Heat Pump System

2010 ◽  
Vol 2 (2) ◽  
Author(s):  
Shui Yuan ◽  
Michel Grabon
Keyword(s):  
Water Temperature ◽  
Heat Pump ◽  
Energy Savings ◽  
Water Source ◽  
Energy Performance ◽  
Heat Pumps ◽  
Pump System ◽  
Heat Pump System ◽  
Heating And Cooling ◽  
The Impact

A water-loop heat pump system consists of a set of water-source heat pumps that are connected with a closed-loop water network, which allows heat to be injected into or extracted out of the loop water. Such a configuration is able to meet simultaneous heating and cooling demands with a heat recovery capability. This paper analyzes the impact of loop water temperature on energy performance of individual heat pumps and the whole system, demonstrates that there exists a unique loop water temperature that minimizes overall power consumption of the configuration under discussion, and proposes a strategy to find the optimal temperature, which can be implemented in a real-time application. Simulations have been conducted to verify that a significant energy savings can be achieved over conventional practice.

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.

Thermoeconomic Optimization of a Seawater Source Heat Pump System for Residential Buildings

2011 ◽  
Vol 354-355 ◽  
pp. 794-797 ◽  
Author(s):  
Zhi Gang Shi ◽  
Zhuo Li
Keyword(s):  
Heat Pump ◽  
Residential Buildings ◽  
Residential Building ◽  
Weather Conditions ◽  
Production Costs ◽  
Pump System ◽  
Heat Pump System ◽  
Optimum Result ◽  
Heating And Cooling ◽  
Attractive Option

A seawater source heat pump (SWHP) system offer an attractive option for heating and cooling residential and commercial buildings owing to their higher energy efficiency compared with conventional systems. A thermoeconomic model was developed for analysis and optimization of SWHP with residential building. The thermodynamic and thermoeconomic optimum result for SWHP in the Qingdao, china, weather conditions were obtained using MATLAB optimization toolbox. The thermoeconomic optimization results show exergy loss and EER increasing by 22.7% and 13.9% respectively, but annual production costs reduce by 29.1%.

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