Topic
Automatic balancing valves
About: Automatic balancing valves is a research topic. Over the lifetime, 266 publications have been published within this topic receiving 1269 citations.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: In this article, the results of a set of measurements that were carried out from March to November 2006 on the operation of eight direct expansion air conditioners having a total cooling capacity of 120 kW installed at a telephone control room near Bologna (North Italy).
Abstract: Adopting electronic expansion valves in air conditioners enables an appreciable energy saving with respect to the same installations equipped with traditional thermostatic expansion valves. This is due to the fact that electronic valves allow a lower condensation pressure in systems equipped with air cooled condensers, which is adjusted to variations in outside air temperature. Furthermore, PID (Proportional–Integral–Derivative) control over the superheating leads to the best use of evaporator under every condition (lower superheating level of the vapour refrigerant), thus increasing the refrigerating capacity. This paper reports on the results of a set of measurements that were carried out from March to November 2006 on the operation of eight direct expansion air conditioners having a total cooling capacity of 120 kW installed at a telephone control room near Bologna (North Italy). Air conditioners are equipped with both thermostatic and electronic expansion valves, alternatively activated by solenoid valves on a daily basis, in order to compare the two systems in the same environment and at similar load conditions. The annual analysis is supplemented by a transient simulation program to simulate the behaviour of the system in the two different operating modes in different European climates, in order to evaluate the energetic and economic advantages of electronic valve.
56 citations
TL;DR: In this paper, the authors proposed an integrated approach that aims to reduce the excess heat loss by introducing pre-set thermostatic radiator valves combined with automatic balancing valves, which established hydraulic balance, and stabilize indoor temperatures.
52 citations
Book•
1 Jan 1970
TL;DR: The scope and uses of air conditioning physical principles heating loads furnaces and boilers hydronic piping systems and terminal units cooling load calculations psychrometrics fluid flow in piping and ducts piping, valves, ducts and insulation fans and air distribution devices centrifugal pumps, expansion tanks and venting air conditioning system and equipment refrigeration systems and equipment automatic controls energy utilization and conservation instrumentation, testing and balancing planning and designing of the HVAC system solar heating and cooling systems Appendixes: building materials and methods, thermal resistance and heat transfer coefficients new load calculation forms illustrations of roof and
Abstract: The scope and uses of air conditioning physical principles heating loads furnaces and boilers hydronic piping systems and terminal units cooling load calculations psychrometrics fluid flow in piping and ducts piping, valves, ducts and insulation fans and air distribution devices centrifugal pumps, expansion tanks and venting air conditioning systems and equipment refrigeration systems and equipment automatic controls energy utilization and conservation instrumentation, testing and balancing planning and designing of the HVAC system solar heating and cooling systems Appendixes: building materials and methods, thermal resistance and heat transfer coefficients new load calculation forms illustrations of roof and wall construction styles
49 citations
TL;DR: In this paper, three separate systems of equations that are in common use in solving steady flow problems in pipe networks are described and the method for including pressure reducing valves in each of these systems is given The emphasis is on use of efficient computer oriented methods.
Abstract: The three separate systems of equations that are in common use in solving steady flow problems in pipe networks are described and the method for including pressure reducing valves in each of these systems is given The emphasis is on use of efficient computer oriented methods In the method presented the pressure reducing valves are permitted to operate normally in maintaining a constant downstream pressure, or are permitted to act as check valves, preventing reverse flow should downstream pressures exceed valve settings The inclusion of pressure reducing valves as an integral part of the network of pipes, pumps, reservoirs, and minor loss devices causes no appreciable reduction in the performance of computer programs that have been specifically written to carry out the computations for solutions
44 citations
Patent•
3M1
TL;DR: In this paper, an air flow device for use in recording, analyzing, replicating, and generating breathing patterns is presented, where a piping structure has a source connection for receiving a single constant source of pressurized gas.
Abstract: An air flow device for use in recording, analyzing, replicating, and generating breathing patterns. A piping structure provides receipt and transfer of pressurized gas through the device. The piping structure has a source connection for receiving a single constant source of pressurized gas. Aspirators are connected to the piping structure for receiving pressurized gas from the source connection and for selectively creating an output pressurization comprising a positive pressure gas flow and a negative pressure gas flow at a proportional solenoid valve. A balancing valve is connected to the piping structure for controlling and calibrating the output pressurization of the aspirators. A control system provides control of the aspirators, the balancing valve, and a solenoid valve. A solenoid valve is mechanically connected to the piping structure with pneumatic input and output connections and electronically connected to the control system with data input and output connections. The solenoid valve provides patterned pneumatic flow between the aspirators and a system model according to air flow commands received by the solenoid from the control system. The system model, in one embodiment, is a breath actuated inhaler device.
41 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 4 |
| 2019 | 7 |
| 2018 | 6 |
| 2017 | 8 |
| 2016 | 13 |
| 2015 | 16 |