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Dettagli Bibliografici
Autore principale:	Sergio Montelier Hernández
Natura:	Artículo científico
Lingua:	es
Pubblicazione:	Universidad Nacional de Colombia 2008
Soggetti:	Ingeniería inteligencia artificial ahorro de energía en hoteles Eficiencia energética en sistemas de climatización por agua helada
Accesso online:	https://www.redalyc.org/articulo.oa?id=147020257002
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INTELIGENCIA ARTIFICIAL APLICADA A LA REDUCCIÓN DEL CONSUMO ENERGÉTICO DE UN SISTEMA DE CLIMATIZACIÓN POR AGUA HELADA EN UN HOTEL TURÍSTICO Sergio Montelier Hernández Marcos A. de Armas Teyra Aníbal Borroto Nordelo Julio R. Gómez Sarduy Carlos Pérez Tello Ingeniería inteligencia artificial ahorro de energía en hoteles Eficiencia energética en sistemas de climatización por agua helada Este artículo presenta una modelación híbrida mediante técnicas de inteligencia artificial, que junto al desarrollo de una estrategia ocupacional en función de las variables climáticas, las cualidades constructivas y la ocupación, permite minimizar el consumo energético de un hotel turístico. Se toma como caso de estudio el Hotel Jagua de la Provincia de Cienfuegos, Cuba. Inicialmente se hace una estimación de la carga de enfriamiento mediante un simulador térmico, para distintos niveles de ocupación y diferentes condiciones climatológicas. Este requerimiento energético es modelado por una red neuronal artificial, con la intención de simplificar el modelo para la dirección técnica del hotel e incrementar la velocidad y la potencia de cálculo del software desarrollado en Matlab. Posteriormente un sistema ANFIS, modela el consumo de energía eléctrica del sistema en función de la carga térmica, el nivel de ocupación, las condiciones climáticas pronosticadas y el punto de ajuste del control de temperatura del sistema. Finalmente, este consumo es optimizado por un algoritmo genético que determina el valor final de ajuste del control de la temperatura del agua helada para que el consumo de electricidad sea mínimo en las condiciones dadas del sistema. 2008 artículo científico 0120-9833 https://www.redalyc.org/articulo.oa?id=147020257002 es http://www.redalyc.org/revista.oa?id=1470 Energética application/pdf Universidad Nacional de Colombia Energética (Colombia) Num.39

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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