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Heat Pumps In Cold Climates
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Book Synopsis Cold Climates Heat Pump Design Optimization by :
Download or read book Cold Climates Heat Pump Design Optimization written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat pumps provide an efficient heating method; however they suffer from sever capacity and performance degradation at low ambient conditions. This has deterred market penetration in cold climates. There is a continuing effort to find an efficient air source cold climate heat pump that maintains acceptable capacity and performance at low ambient conditions. Systematic optimization techniques provide a reliable approach for the design of such systems. This paper presents a step-by-step approach for the design optimization of cold climate heat pumps. We first start by describing the optimization problem: objective function, constraints, and design space. Then we illustrate how to perform this design optimization using an open source publically available optimization toolbox. The response of the heat pump design was evaluated using a validated component based vapor compression model. This model was treated as a black box model within the optimization framework. Optimum designs for different system configurations are presented. These optimum results were further analyzed to understand the performance tradeoff and selection criteria. The paper ends with a discussion on the use of systematic optimization for the cold climate heat pump design.
Book Synopsis Field Validation of Air-Source Heat Pumps for Cold Climates by :
Download or read book Field Validation of Air-Source Heat Pumps for Cold Climates written by and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heating energy is the largest end-use for U.S. residential buildings accounting for approximately one-third of residential building energy consumption (EIA 2021). Historically, air-source heat pumps have been limited to temperate climates because of subpar performance at extremely cold outdoor air temperatures. However, recent advances to cold-climate air-source heat pump technology, which typically rely on inverter-driven, variable-speed compressors and variable-speed fans, have significantly improved low-temperature heat pump performance enabling the technology to save energy for many homes in cold climates. The primary objective of this project was to measure in-field performance of centrally ducted, variable-capacity air-source heat pumps in cold climates to validate performance and develop field-based performance maps. The project focused on quantifying heat pump performance at cold temperatures. The sites identified for the study were primarily located in the Northwest United States since homes in the region tend to have all-electric space heating systems and high-efficiency heat pumps have been incentivized in the region for several years. NREL partnered with Ecotope, Inc., a small energy consulting firm located in Seattle, WA, for site recruitment, monitoring equipment installation, data quality management. All the sites included in the study had previously installed a high-efficiency, central heat pump system. One site was in a Denver, CO suburb, which was the only dual fuel heat pump in the study. We used airside and power measurements, collected at 5-second intervals, to quantify heat pump capacity, coefficient of performance (COP), and auxiliary heater energy consumption. We developed algorithms to automatically determine the heat pump operating mode including defrost and auxiliary heating operation. A whole-house thermal and duct audit was completed during the initial site visit to estimate winter heating loads and assess heat pump sizing. Whole-home heating design loads were calculated at ASHRAE 99% design temperatures and compared to manufacturer-reported maximum capacities to assess the heat pump sizing at each site.
Book Synopsis Heating and Cooling with Ground-Source Heat Pumps in Cold and Moderate Climates by : Vasile Minea
Download or read book Heating and Cooling with Ground-Source Heat Pumps in Cold and Moderate Climates written by Vasile Minea and published by CRC Press. This book was released on 2022-04-19 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heating and Cooling with Ground-Source Heat Pumps in Cold and Moderate Climates: Fundamentals and Basic Concepts covers fundamentals and design principles of vertical and horizontal indirect and direct expansion closed-loop, as well as ground and surface-water ground-source heat pump systems. It explains the thermodynamic aspects of mechanical and thermochemical compression cycles of geothermal heat pumps, and describes the energetic, economic, and environmental aspects associated with the use of ground-source heat pump systems for heating and cooling residential and commercial/institutional buildings in moderate and cold climates. Based on the author's more than 30 years of technical experience Focuses on ground-source heat pump technologies that can be successfully applied in moderate and cold climates Discusses technical aspects as well as the most common and uncommon application fields of basic system configurations This work is aimed at designers of HVAC systems, as well as geological, mechanical, and chemical engineers implementing environmentally-friendly heating and cooling technologies for buildings.
Book Synopsis Heating and Cooling with Ground-Source Heat Pumps in Cold and Moderate Climates by : Vasile Minea
Download or read book Heating and Cooling with Ground-Source Heat Pumps in Cold and Moderate Climates written by Vasile Minea and published by CRC Press. This book was released on 2022-04-19 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heating and Cooling with Ground-Source Heat Pumps in Cold and Moderate Climates: Design Principles, Potential Applications and Case Studies focuses on applications and cases studies of ground-source heat pumps in moderate and cold climates. It details technical aspects (such as materials, thermal fluid carriers and pumping, and drilling/trenching technologies), as well as the most common and uncommon application fields for basic system configurations. The principles of system integrations and applications in moderate and cold climates (such as hybrid, solar-assisted, thermo-syphon, foundation, mines, snow melting, district heating and cooling ground-source heat pump systems, etc.) are also presented, each followed by case studies. Based on the author's more than 30 years of technical experience Discusses ground-source heat pump technologies that can be successfully applied in moderate and cold climates Presents several case studies, including successful energy results, as well as the main lessons learned This work is aimed at designers of HVAC systems, as well as geological, mechanical, and chemical engineers implementing environmentally-friendly heating and cooling technologies for buildings.
Book Synopsis Single-room Heat Pumps for Cold Climates by :
Download or read book Single-room Heat Pumps for Cold Climates written by and published by . This book was released on 2002 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heat Pumps in Cold Climates by : Caneta Research Inc
Download or read book Heat Pumps in Cold Climates written by Caneta Research Inc and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cold climates have always presented a challenge to heat pump equipment. In spite of this challenge, the heat pump industry is growing. Consumer interest and acceptance is on the rise, and increasing numbers of businesses, industries and institutions are realizing the financial and environmental benefits of heat pumps. This was the third International Conference on Heat Pumps in Cold Climates. The first two were hosted and sponsored by the University of Moncton and New Brunswick Power in 1990 and 1993.A total of 44 papers were presented at this meeting in two concurrent sessions and two poster sessions over the two days. Papers included in these proceedings were presented in the technical topic areas of design tools, alternative refrigerants to R22, gas -fired heat pumps and heat pump performance assessment. Market and application topic areas included measuring success of heat pump initiatives, lessons-learned from utility heat pump programs, the new electric industry environment, heat pump reliability, heat pumps in commercial buildings and trends in heat pump efficiency.
Book Synopsis Performance Considerations for Ground Source Heat Pumps in Cold Climates by : Robbin Garber-Slaght
Download or read book Performance Considerations for Ground Source Heat Pumps in Cold Climates written by Robbin Garber-Slaght and published by . This book was released on 2021 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cold Climate HVAC 2018 by : Dennis Johansson
Download or read book Cold Climate HVAC 2018 written by Dennis Johansson and published by Springer. This book was released on 2018-12-12 with total page 1095 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the proceedings of the 9th Cold Climate HVAC conference, which was held in Kiruna, Sweden in 2018. The conference highlighted key technologies and processes that allow scientists, designers, engineers, manufacturers and other decision makers in cold climate regions to achieve good indoor environmental quality (IEQ) with a minimum use of energy and other resources. The conference addressed various technical, economic and social aspects of buildings and HVAC systems in new and renovated buildings. This proceedings volume gathers peer-reviewed papers by a diverse and international range of authors and showcases perspectives and practices in cold climate building design from around the globe. The following major aspects, which include both fundamental and theoretical research as well as applications and case studies, are covered: (1) Energy and power efficiency and low-energy buildings; (2) Renovating buildings; (3) Efficient HVAC components; (4) Heat pumps and geothermal systems; (5) Municipal and city energy systems; (6) Construction management; (7) Buildings in operation; (8) Building simulation; (9) Reference data; (10) Transdisciplinary connections and social aspects; (11) Indoor environments and health; (12) Moisture safety and water damage; (13) Codes, regulations, standards and policies; and (14) Other aspects of buildings in cold climates.
Book Synopsis Field Performance of Inverter-Driven Heat Pumps in Cold Climates by :
Download or read book Field Performance of Inverter-Driven Heat Pumps in Cold Climates written by and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: New inverter-driven ASHPs are gaining ground in colder climates. These systems operate at sub-zero temperatures without the use of electric resistance backup. There are still uncertainties, however, about cold-climate capacity and efficiency in cold weather and questions such as coil. CARB observed a wide range of operating efficiencies and outputs from site to site. Maximum capacities were found to be generally in line with manufacturer's claims as outdoor temperatures fell to -10 degrees F. The reasons for the wide range in heating performance likely include: low indoor air flow rates, poor placement of outdoor units, relatively high return air temperatures, thermostat set back, integration with existing heating systems, and occupants limiting indoor fan speed. Even with lower efficiencies than published in other studies, most of the heat pumps here still provide heat at lower cost than oil, propane, or certainly electric resistance systems.
Book Synopsis Heat Pumps for Cold Climate Heating by : Hui Huang
Download or read book Heat Pumps for Cold Climate Heating written by Hui Huang and published by CRC Press. This book was released on 2020-05-01 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air source heat pumps are mainly used for space heating, and have the advantages of environmental protection, energy saving, and comfort. Written by leading heat pump technology expert Hui Huang, this book summarizes the research and applications of variable volume ratio two-stage vapor compression air source heat pump technology, and its use in cold climate regions. This book can be used for reference by scientific researchers and engineers engaged in research on air source heat pump technology, product development and popularization; and by energy management and policy researchers. It will also be of value to undergraduate and graduate students studying these areas of technology.
Book Synopsis Heat Pumps in Cold Climates by : Caneta Research Inc
Download or read book Heat Pumps in Cold Climates written by Caneta Research Inc and published by . This book was released on 1990 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heat Pumps in Cold Climates by : Caneta Research Inc
Download or read book Heat Pumps in Cold Climates written by Caneta Research Inc and published by . This book was released on 1994 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Efficiency Heat Pumps Can Pave the Path for Building Decarbonization in Cold Climates: Preprint by :
Download or read book High Efficiency Heat Pumps Can Pave the Path for Building Decarbonization in Cold Climates: Preprint written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat pumps play an instrumental role in buildings decarbonization strategies. Recent advances in heat pump systems employ variable-speed compressor technology and electronically commutated fan motors. Inherently, the heating capacity and efficiency of heat pumps decrease with falling outdoor temperatures. Compared to single-speed heat pumps, variable speed systems can maintain higher heating and cooling efficiencies over a wider range of outdoor temperatures. The goal of this multi-phase project was to determine the energy savings of a high efficiency, variable-speed, air-source, split system heat pump designed for cold climate applications. The first project phase was to evaluate the performance of the heat pump in the laboratory under varying outdoor conditions in heating and cooling modes. The second phase was to translate the laboratory-measured performance into lookup tables for EnergyPlus hourly building simulation engine. Then, two sets of annual building simulations were performed using typical meteorological year weather from the Chicago-O'Hare airport for three different building types (a single-family residence, a strip mall, and a low-rise office building). The first set simulated a standard efficiency heat pump while the second set utilized the phase two performance tables to model a high efficiency heat pump. The high efficiency heat pump produced significant annual heating energy savings in all three buildings. The variable speed compressor and fan control also contributed to cooling energy savings. The simulated annual energy savings ranged from 22% to 35% over their respective baseline. The project's findings helped a Midwest electric utility, Commonwealth Edison (ComEd), design new incentives around high efficiency heat pumps.
Book Synopsis Heating and Cooling with Ground-Source Heat Pumps in Moderate and Cold Climates, Two-Volume Set by : Vasile Minea
Download or read book Heating and Cooling with Ground-Source Heat Pumps in Moderate and Cold Climates, Two-Volume Set written by Vasile Minea and published by CRC Press. This book was released on 2022-07-30 with total page 841 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heating and Cooling with Ground-Source Heat Pumps in Moderate and Cold Climates, Two-Volume Set focuses on the use of very low-temperature geothermal energy for heating and cooling residential, institutional, and industrial buildings, and aims to increase the design community’s awareness and knowledge of the benefits, design, and installation requirements of commercial/institutional building ground-source heat pumps (GSHP). This set helps readers assess applicability, select a GSHP system type, and estimate building thermal load to ensure proper size for ground-source subsystems, appropriate brine and groundwater flow rates, and apt design of building closed-loops with distributed or central geothermal heat pumps. The first volume addresses fundamentals and design principles of vertical and horizontal indirect and direct expansion closed-loop, as well as ground- and surface-water ground-source heat pump systems. It explains the thermodynamic aspects of mechanical and thermochemical compression cycles of geothermal heat pumps, as well as the energetic, economic, and environmental aspects associated with the use of ground-source heat pump systems for heating and cooling residential and commercial/institutional buildings in moderate and cold climates. The second volume focuses on applications and cases studies of ground-source heat pumps in moderate and cold climates. It details technical aspects, as well as the most common and uncommon application fields of basic system configurations. The principles of system integrations and applications in moderate and cold climates are also presented, each followed by case studies. This comprehensive work is aimed at designers of HVAC systems, as well as geological, mechanical, and chemical engineers implementing environmentally-friendly heating and cooling technologies for buildings.
Book Synopsis Learning from Experiences with Commercial/institutional Heat Pump Systems in Cold Climates by : Doug Cane
Download or read book Learning from Experiences with Commercial/institutional Heat Pump Systems in Cold Climates written by Doug Cane and published by . This book was released on 2000 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nordsyn study on air-to-water heat pumps in humid Nordic climate by : Stignor, Caroline Haglund
Download or read book Nordsyn study on air-to-water heat pumps in humid Nordic climate written by Stignor, Caroline Haglund and published by Nordic Council of Ministers. This book was released on 2019-05-03 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study presented in this report has been performed for Nordsyn sponsored by the Nordic Council of Ministers. The aim of this study was to analyse if the information given on the energy labels of air-to-water heat pumps give consumers in Nordic countries sufficient information on energy performance. When comparing results from field measurements to declared values, it shows the declared values are usually better than the field data, especially in countries with humid climate. There could be several reasons for this deviation as non-optimal installations, bypass of control systems, old field data etc. The suspicion that the deviation is due to that the standard tests do not take humidity sufficiently into account could not be proved nor fully dismissed. Recommendations are given on how this could be further investigated, including field measurements in Nordic countries.
Book Synopsis Cold Climate Air Source Heat Pumps (ccASHPs) Technology by :
Download or read book Cold Climate Air Source Heat Pumps (ccASHPs) Technology written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes cold climate air source heat pump technology. Cold climate air source heat pumps (ccASHPs) are a variation of an existing air conditioning technology - heat pumps - that are designed to heat homes adequately in very cold weather (usually at or below 5 degrees F) and, as a secondary function, cool these homes during warm weather.
