نتایج جستجو برای: air compressor cooling system

تعداد نتایج: 2440005  

Journal: :ASHRAE winter conference papers. American Society of Heating, Refrigeration and Air-Conditioning Engineers 2016
W Vance Payne

A 2715 ft2 (252 m2), two story, residential home of the style typical of the Gaithersburg, Maryland area was constructed in 2012 to demonstrate technologies for net-zero energy (NZE) homes (or ZEH). The NIST Net-Zero Energy Residential Test Facility (NZERTF) functions as a laboratory to support the development and adoption of cost-effective NZE designs, technologies, construction methods, and b...

The present study investigates the effectiveness of thermostat control strategy in cooling energy consumption in residential buildings. To evaluate the energy consumption, two scenarios including a residential zone with and without the thermostat control system are assumed. The TRNSYS software provides an efficient numerical tool to model and evaluate a cooling system. Furthermore, since solar-...

Journal: : 2021

The vapor compression cooling devices operate on the same principle as heat pumps. In these types of machines thermal energy is transferred from cold environment to warmer side using provided power by compressor. this study, effect air flow rate performance has been investigated simulating a designed system in AVL CRUISE™ M program. simulated model air-to-air machine and refrigerant R134a was u...

2013
Mohsen Saadat Farzad A. Shirazi Perry Y. Li

To achieve both accumulator pressure regulation and generator power tracking for a Compressed Air Energy Storage (CAES) system, a nonlinear controller designed base on an energy based Lyapunov function. The control inputs for the storage system are the pump/motor displacements inside the hydraulic transformer and the liquid piston air compressor/expander. While the pump/motor inside the liquid ...

2014
Z. Liu

Compressor performance is ioiluenced by many factors. Besides the commonly considered factors such as suction gas heating, leakage, compressed gas re-expansion, gas pulsations, and back flow, supercharging effect on performance is also studied. Since the compressor used in this study operates in a wide speed range, from 1100 rpm up to 9000 rpm, how those factors affect the compressor performanc...

One of basic principles in designing treatment environments is to design air conditioning/ventilation system proportionate to environment. Essentially, appropriate air conditioner in treatment spaces must bear the following capabilities: providing healthy and clean air, reducing the concentration of pollutants produced in the atmosphere, emission of pollutants and impeding their spread in exter...

2014
I. Grace D. Datta S. A. Tassou Iain Grace

An experimental rig has been built to test a horizontal scroll compressor and a reciprocating compressor of similar size and capacity. The compressors were tested with refrigerant.R404A operating at varying evaporator and condenser temperatures. The paper provides much needed information regarding the efficiency of the compressors operating under the same conditions with the same system paramet...

2014
Stefan S. Bertsch Eckhard A. Groll David B. Bouffard William J. Hutzel Stefan S. BERTSCH Eckhard A. GROLL David B. BOUFFARD William J. HUTZEL

Air source heat pumps are widely used for residential heating because of their relatively low installation costs. Major disadvantages are that the heat output and COP decrease and the discharge temperature of the compressor increases as the outdoor temperature decreases. All of these factors usually lead to the need of combined heat pump and backup heating systems, which increases the cost and ...

2014
Inju Lee Jihoon Choi JeongIl Park Jeonghoon Kang Philsoo Chang Jeongbae Lee Ji-Hoon Choi JeongIL Park JeongHoon Kang

It is well known that the compressor with variable capacities has a higher efficiency than the typical single capacity compressors for the air-conditioner system. Therefore, many compressor makers are trying to develop variable types of capacity-controlling compressors, one of which is a vane locking controlled rotary compressor. This paper investigates the rotary compressor using a vane contro...

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